Test Bank for Microsoft Visual C# An Introduction to Object-Oriented Programming, 7th Edition

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Test Bank for All chapters Chapter 01: A First Program Using C# 1. Machine language is expressed as a series of 1s and 0s. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. Machine language is expressed as a series of 1s and 0s. The 1s represent switches that are on, and the 0s represent switches that are off.

Incorrect Incorrect. Machine language is expressed as a series of 1s and 0s. The 1s represent switches that are on, and the 0s represent switches that are off.

POINTS: 1 REFERENCES: The Programming Process QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.01 - Describe the programming process DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

2. C# programmers must use Pascal casing when creating method names to produce an executable program. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. Capitalizing the first letter of all new words in an identifier, even the first one, as in CalculateWithholdingTax(), is a style called Pascal casing or upper camel casing. It is legal to start a method name with a lowercase letter, but the convention used in C# is for methods to be named using Pascal casing.

Incorrect Incorrect. Capitalizing the first letter of all new words in an identifier, even the first one, as in CalculateWithholdingTax(), is a style called Pascal casing or upper camel casing. It is legal to start a method name with a lowercase letter, but the convention used in C# is for methods to be named using Pascal casing.

POINTS: 1 REFERENCES: The Programming Process QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.02 - Differentiate between procedural and object-oriented programming DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

3. The C# programming language was developed as an object-oriented and component-oriented language. a. True b. False ANSWER:

True

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Correct

Correct. The C# programming language was developed as an object-oriented and component-oriented language. It is part of Microsoft Visual Studio, a package designed for developing applications that run on Windows computers. Unlike other programming languages, C# allows every piece of data to be treated as an object and to consistently employ the principles of object-oriented programming. C# provides constructs for creating components with properties, methods, and events, making it an ideal language for modern programming, where building small, reusable components is more important than building huge, stand-alone applications.

Incorrect Incorrect. The C# programming language was developed as an object-oriented and component-oriented language. It is part of Microsoft Visual Studio, a package designed for developing applications that run on Windows computers. Unlike other programming languages, C# allows every piece of data to be treated as an object and to consistently employ the principles of object-oriented programming. C# provides constructs for creating components with properties, methods, and events, making it an ideal language for modern programming, where building small, reusable components is more important than building huge, stand-alone applications.

POINTS: 1 REFERENCES: The C# Programming Language QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.04 - Describe the C# programming language DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

4. When the keyword void is used in the Main() method header, it indicates that the Main() method is empty. a. True b. False ANSWER: FEEDBACK:

False Correct. When the keyword void is used in the Main() method header, it does not indicate that the Main() method is empty or that it has no effect, but rather that the method does not return any value when called.

Incorrect Incorrect. When the keyword void is used in the Main() method header, it does not indicate that the Main() method is empty or that it has no effect, but rather that the method does not return any value when called.

Correct

POINTS: 1 REFERENCES: Writing a C# Program that Produces Output QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.05 - Write a C# program that produces output DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

5. The Visual Studio IDE gives you advanced features such as syntax coloring and automatic statement completion.

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a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. The code is displayed in color so that you can more easily identify parts of your program. Reserved words appear in blue, comments in green, and identifiers in black. Automatic code completion is also possible in the Visual Studio IDE. Incorrect Incorrect. The code is displayed in color so that you can more easily identify parts of your program. Reserved words appear in blue, comments in green, and identifiers in black. Automatic code completion is also possible in the Visual Studio IDE.

POINTS: 1 REFERENCES: Compiling and Executing a C# Program QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.08 - Compile and execute a C# program using the command prompt and using Visual Studio DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

6. Internally, computers are constructed from circuitry that consists of small on/off switches. What is the most basic circuitry-level language that computers use to control the operation of those switches called? a. syntax b. machine language c. compiler d. program ANSWER: FEEDBACK:

b

a. Incorrect. Syntax is the rules of a high-level language. Each high-level language has its own syntax. b. Correct. Machine language is expressed as a series of 1s and 0s. The 1s represent switches that are on, and the 0s represent switches that are off. c. Incorrect. A compiler translates high-level language statements into machine code. d. Incorrect. A computer program is a set of instructions that tells a computer what to do. Programs are also called software.

POINTS: 1 REFERENCES: The Programming Process QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.01 - Describe the programming process DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

7. What kind of programming language allows you to use a vocabulary of reasonable terms such as "read," "write," or "add" instead of the sequence of on/off switches that perform these tasks? a. high-level Copyright Cengage Learning. Powered by Cognero.

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b. machine-level c. low-level d. switch-level ANSWER: FEEDBACK:

a

a. Correct. A high-level programming language allows you to use a limited vocabulary of reasonable keywords. Keywords are predefined and reserved identifiers that have special meaning in a language. High-level language programs contain keywords, such as read, write, and add, that you use instead of the sequence of on/off switches that perform these tasks.

b. Incorrect. Machine language is expressed as a series of 1s and 0s. The 1s represent switches that are on, and the 0s represent switches that are off. c. Incorrect. A low-level programming language, such as assembly language, is only a small step above the representation of computer instructions as a series of 1s and 0s. d. Incorrect. "A switch-level programming language" is an undefined term but it describes a low-level programming language that where toggle switches can be used as part of configuration.

POINTS: 1 REFERENCES: The Programming Process QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.01 - Describe the programming process DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

8. Programmers make use of what type of program in order to translate higher-level language statements into machine code? a. a command prompt b. an IDE c. a compiler d. a JIT ANSWER: FEEDBACK:

c

a. Incorrect. The command line is the line on which you type a command in a system that uses a text interface. The command prompt is a request for input that appears at the beginning of the command line. b. Incorrect. The Integrated Development Environment (IDE) is a programming environment that allows you to issue commands by selecting choices from menus and clicking buttons. The IDE operates more like other software you may have used, such as a word-processing program or spreadsheet. Many programmers prefer using the IDE because it provides features such as color-coded keywords and automatic statement completion. c. Correct. A compiler translates high-level language statements into machine code.

d. Incorrect. The C# just in time (JIT) compiler must translate the intermediate code into executable code.

POINTS:

1

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REFERENCES: The Programming Process QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.01 - Describe the programming process DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

9. A program's execution of various statements and procedures in a correct order to produce desired results is referred to as what defining characteristic? a. the program's GUI b. the attributes utilized by the program c. the methods of the program d. the program's logic ANSWER: FEEDBACK:

d

a. Incorrect. The acronym GUI stands for graphical user interface. b. Incorrect. The attributes of an object represent its characteristics. c. Incorrect. Methods are compartmentalized, named program units containing instructions that accomplish tasks. d. Correct. The logic behind any program involves executing the various statements and methods in the correct order to produce the desired results.

POINTS: 1 REFERENCES: The Programming Process QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.01 - Describe the programming process DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

10. What is the process of removing all syntax and logical errors from a program in order to create a working program that accomplishes all intended tasks known as? a. debugging b. compiling c. commenting out d. executing ANSWER: FEEDBACK:

a

a. Correct. A bug is an error in a computer program. Debugging a program is the process of removing all syntax and logical errors from the program. b. Incorrect. A compiler is a computer program that translates high-level language statements into machine code. c. Incorrect. Commenting out a statement in a program causes that statement not to run. d. Incorrect. Executing a program is the same as running a program.

POINTS: REFERENCES:

1 The Programming Process

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QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.01 - Describe the programming process DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

11. What type of program is created by the use of named memory locations and a series of steps or operations to manipulate the values of those memory locations? a. object-oriented b. component-oriented c. variable-oriented d. procedural ANSWER: FEEDBACK:

d

a. Incorrect. Object-oriented programming (OOP) is a programming technique that features objects, classes, encapsulation, interfaces, polymorphism, and inheritance. b. Incorrect. Component-oriented programming creates programs by building and connecting components that are reusable pieces of software with properties, methods, and events. c. Incorrect. "Variable-oriented programming" is an undefined term. It is likely a confusion of the use of variables, which are named memory locations, in programs. d. Correct. A procedural program is a program created by writing a series of steps or operations to manipulate values.

POINTS: 1 REFERENCES: Procedural and Object-Oriented Programming QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.02 - Differentiate between procedural and object-oriented programming DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

12. What term describes a one-word name with no embedded spaces that references a variable in a program? a. behavior b. bug c. identifier d. attribute ANSWER: FEEDBACK:

c

a. Incorrect. The behaviors of an object are the methods associated with it. b. Incorrect. Bugs are program errors. c. Correct. Identifiers are the names of program components such as variables, classes, and methods. d. Incorrect. The attributes of an object are the characteristics of it.

POINTS:

1

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REFERENCES: Procedural and Object-Oriented Programming QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.02 - Differentiate between procedural and object-oriented programming DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

13. A series of four or five comparisons and calculations that together determine an employee's withholding tax value might be grouped using what sort of logical unit? a. an attribute b. a method c. a class d. a structure ANSWER: FEEDBACK:

b

a. Incorrect. The attributes of an object are the characteristics of an object. b. Correct. A method is an encapsulated series of statements that carry out a task. c. Incorrect. A class is a category of objects or a type of object. d. Incorrect. "Structure" describes a physical arrangement or sequence. Structure may refer to ways to sort data, or a logical flow of instructions

POINTS: 1 REFERENCES: Procedural and Object-Oriented Programming QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.02 - Differentiate between procedural and object-oriented programming DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

14. What programming style capitalizes the first letter of all new words in an identifier, including the first one? a. camel casing b. upper casing c. OOP casing d. Pascal casing ANSWER: FEEDBACK:

d

a. Incorrect. Camel casing capitalizes the first letter of every word except the first. b. Incorrect. Upper casing capitalizes every letter. c. Incorrect. There is no strict and agreed upon object-oriented programming casing. d. Correct. Pascal casing, also called upper camel casing, capitalizes the first letter of each word, including the first.

POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Procedural and Object-Oriented Programming Multiple Choice False

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LEARNING OBJECTIVES: MVC#.FARR.18.01.02 - Differentiate between procedural and object-oriented programming DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

15. What is an object in relation to a defined class in a programming language? a. It is a property of the class. b. It is an interface to the class. c. It is an instance of the class. d. It defines the class state.

ANSWER: FEEDBACK:

c

a. Incorrect. A property of a class is a member of a class that provides access to a field of a class. Properties define how fields are set and retrieved. b. Incorrect. An interface is a collection of abstract methods (and perhaps other members) that can be used by any class as long as the class provides a definition to override the interface’s abstract definitions. c. Correct. An object is an instance of a class; it is one tangible example of a class.

d. Incorrect. The state of a class or an object is the value of all of its attributes.

POINTS: 1 REFERENCES: Features of Object-Oriented Programming Languages QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.03 - Describe the features of object-oriented programming languages DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

16. What technique involves the packaging of an object's attributes and methods into a cohesive unit that can be used as an undivided entity? a. encapsulation b. polymorphism c. inheritance d. interface ANSWER: FEEDBACK:

a

a. Correct. Encapsulation is the technique of packaging an object’s attributes and methods into a cohesive unit that can be used as an undivided entity.

Programmers sometimes refer to encapsulation as using a black box, a device you use without regard for its internal mechanisms. b. Incorrect. Polymorphism is the ability to create methods that act appropriately depending on the context. c. Incorrect. Inheritance provides the ability to extend a class so as to create a more specific class. d. Incorrect. The interface of an object is the interaction between the method and object. For example, if you can fill your vehicle with gasoline, it is because you understand the interface between the gas pump nozzle and the vehicle’s gas tank opening.

POINTS:

1

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REFERENCES: Features of Object-Oriented Programming Languages QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.03 - Describe the features of object-oriented programming languages DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

17. Encapsulation is similar to using a device without regard for the internal mechanisms. What is the common term for this type of device? a. interface b. black box c. object d. blue box ANSWER: FEEDBACK:

b

a. Incorrect. The interface is the interaction between a method and an object. While it is true that when an object is encapsulated the user must understand only the interface, the word "interface" is not a common term that describes a device that hides internal mechanisms. b. Correct. Programmers sometimes refer to encapsulation as using a black box, a device you use without regard for its internal mechanisms. c. Incorrect. An object is an instance of class; it is a tangible example of a class.

d. Incorrect. A blue box is a device for generating the tones that older telephone computers used.

POINTS: 1 REFERENCES: Features of Object-Oriented Programming Languages QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.03 - Describe the features of object-oriented programming languages DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

18. What can be used to extend an existing class so as to create a more specific class? a. inheritance b. encapsulation c. polymorphism d. abstraction ANSWER: FEEDBACK:

a

a. Correct. Inheritance provides the ability to extend a class so as to create more specific classes. The more specific classes contain all the attributes and methods of the more general class and usually contain new attributes or methods as well. b. Incorrect. Encapsulation is the technique of packaging an object’s attributes and methods into a cohesive unit that can be used as an undivided entity.

Programmers sometimes refer to encapsulation as using a black box, a device you use without regard for its internal mechanisms. c. Incorrect. Polymorphism is the ability to create methods that act appropriately

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depending on the context. d. Incorrect. Abstraction is the process of removing the details of a thing in order to model it with a simpler set of principles or ideas that represent the thing to be modeled well.

POINTS: 1 REFERENCES: Features of Object-Oriented Programming Languages QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.03 - Describe the features of object-oriented programming languages DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

19. What information must be supplied when utilizing a method that requires additional information in order to operate? a. literal strings b. primitive data c. arguments d. namespace ANSWER: FEEDBACK:

c

a. Incorrect. A literal string is a series of characters that is used exactly as entered, such as "Hello World!" b. Incorrect. Primitive data describes simple data items, such as integers or characters, from which more complex data can be built. c. Correct. Arguments represent information that a method needs to perform its task. d. Incorrect. A namespace is a constructor that acts like a container to provide a way to group similar classes.

POINTS: 1 REFERENCES: Writing a C# Program that Produces Output QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.05 - Write a C# program that produces output DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

20. The program you are creating must output information onto the screen, and then position the cursor on the next line in preparation for additional output. What method should you use? a. Write() b. Println() c. Main() d. WriteLine() ANSWER: FEEDBACK:

d

a. Incorrect. With Write(), the cursor does not advance to a new line; it remains on the same line as the output.

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b. Incorrect. Writing Println() causes an error because this is not a built-in method in C#. c. Incorrect. The Main() method is the starting point for every program.

d. Correct. The WriteLine() method is a built-in method that is part of the C# language. It displays output on the screen and positions the cursor on the next line, where additional output might subsequently be displayed.

POINTS: 1 REFERENCES: Writing a C# Program that Produces Output QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.05 - Write a C# program that produces output DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

21. What can be used as a construct that acts like a container to provide a way to group similar classes? a. namespace b. method c. object d. black box ANSWER: FEEDBACK:

a

a. Correct. A namespace is a construct that acts like a container to provide a way to group similar classes. To organize your classes, you can create your own namespaces. The System namespace, which is built into your C# compiler, holds commonly used classes.

b. Incorrect. A method is an encapsulated series of statements that carry out a task. c. Incorrect. An object is a concrete entity that has attributes and behaviors; it is an instance of a class. d. Incorrect. A black box is any device that can be used without knowing how it works internally.

POINTS: 1 REFERENCES: Writing a C# Program that Produces Output QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.05 - Write a C# program that produces output DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

22. The use of void and static are both examples of what predefined C# language component? a. classes b. attributes c. objects d. keywords ANSWER:

d

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a. Incorrect. A class is a category of objects or a type of object. Neither void nor static is a class. b. Incorrect. The attributes of an object are its characteristics. Neither void nor static is a characteristic of an object. c. Incorrect. An object is a concrete entity that has attributes and behaviors; it is an instance of a class. Neither void nor static is an object. d. Correct. Keywords are predefined and reserved identifiers that have special meaning to the compiler. Both void and static are keywords in C#.

POINTS: 1 REFERENCES: Writing a C# Program that Produces Output QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.05 - Write a C# program that produces output DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

23. What are nonexecuting statements that you can use to document or add notes to assist in the use of the program? a. verbatim identifier b. program comments c. namespaces d. whitespaces ANSWER: FEEDBACK:

b

a. Incorrect. The verbatim identifier, @, is a prefix used when you wish to use a keyword as an identifier. b. Correct. Program comments are nonexecuting statements that document a program. c. Incorrect. A namespace is a construct that acts like a container to provide a way to group similar classes. d. Incorrect. Whitespace is any combination of spaces, tabs, and carriage returns (blank lines). You use whitespace to organize your program code and make it easier to read; it does not affect your program’s execution.

POINTS: 1 REFERENCES: Improving Programs by Adding Comments and using the System Namespace QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.07 - Improve programs by adding comments and using the System namespace DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

24. What must be done once a C# program has been finished before it can be used? a. It must be fed to a runtime interpreter. b. It must be compiled into intermediate language.

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c. It must be stripped of all comments before it can run. d. It must be compiled in both the command line and within the Integrated Development Environment.

ANSWER: FEEDBACK:

b

a. Incorrect. C# programs are not run through a runtime interpreter. An interpreter directly executes program statements without a compile step. b. Correct. After you write and save a program, two more steps must be performed before you can view the program output. The first step is to compile the program into intermediate language (IL). c. Incorrect. Program comments are nonexecuted statements; they can exist in a usable program. d. Incorrect. When you write, compile, and execute a C# program, you can use either a text editor and command line or the Visual Studio IDE. You would never need to use both.

POINTS: 1 REFERENCES: Compiling and Executing a C# Program QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.08 - Compile and execute a C# program using the command prompt and using Visual Studio DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

25. Where can a method's name and information about what will be passed into the method and returned from it be found? a. in the body of the method b. in the method's keywords c. in the method's class definitions d. in the method's header ANSWER: FEEDBACK:

d

a. Incorrect. The method body is all of the instructions contained within a pair of curly braces ( { } ). b. Incorrect. Keywords are predefined and reserved identifiers that have special meaning to the compiler. c. Incorrect. A class definition can have methods, but a method does not have a class definition. d. Correct. The method header is the first line of a method, which includes the method name and information about what will pass into and be returned from it.

POINTS: 1 REFERENCES: Writing a C# Program that Produces Output QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.05 - Write a C# program that produces output DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

26. An identifier that is prefixed with an @ and allows you to use code written in other languages that do not Copyright Cengage Learning. Powered by Cognero.

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have the same set of reserved keywords is known by what name? a. a language identifier b. a verbatim identifier c. a translating identifier d. a commenting identifier ANSWER: FEEDBACK:

b

a. Incorrect. An identifier is the name of a program component such as a variable, class, or method. There is no such thing as a language identifier in C# because the language does not need to be identified within the program. b. Correct. An identifier with an @ prefix is a verbatim identifier. This feature allows you to use code written in other languages that do not have the same set of reserved keywords. However, when you write original C# programs, you should not use the keywords as identifiers. c. Incorrect. An identifier is the name of a program component such as a variable, class, or method. There is no such thing as a translating identifier in C#. d. Incorrect. An identifier is the name of a program component such as a variable, class, or method. There is no such thing as a commenting identifier in C#.

POINTS: 1 REFERENCES: Selecting Identifiers QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.06 - Select identifiers to use within your programs DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

27. What command can be used from the Developer Command Prompt in order to compile a C# program? a. c#-compile b. csc c. gcc-c# d. csharpc ANSWER: FEEDBACK:

b

a. Incorrect. c#-compile is not a recognized command for the Developer Command Prompt. b. Correct. In the Developer Command Prompt window, you change the path to the location of your file and then type csc, followed by the name of the file that contains the source code. The command csc stands for C Sharp compiler. c. Incorrect. gcc-c# is not a recognized command for the Developer Command Prompt. d. Incorrect. csharpc is not a recognized command for the Developer Command Prompt.

POINTS: 1 REFERENCES: Compiling and Executing a C# Program QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.08 - Compile and execute a C# program using the command prompt and Copyright Cengage Learning. Powered by Cognero.

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using Visual Studio 5/16/2017 12:52 PM 11/15/2019 3:43 PM

28. When writing C# code, how do you indicate a namespace? a. You must specify the namespace by using the namespace keyword, followed by the namespace. b. You must use the declare namespace keywords, followed by the namespace. c. You must utilize the using clause, or using directive, by specifying using, followed by the namespace. d. You must use create a file called "namespace", and include all namespace code in this file. Then, the namespace can be used by name in your program.

ANSWER: FEEDBACK:

c

a. Incorrect. The namespace keyword is used to declare a namespace, not to use a namespace. b. Incorrect. There is no keyword declare in C#. c. Correct. When you need to repeatedly use a class from the same namespace, you can shorten the statements you type by adding a clause that indicates a namespace containing the class. You indicate a namespace with a using clause, or using directive. d. Incorrect. You should not name files after keywords, and namespace is a keyword.

POINTS: 1 REFERENCES: Improving Programs by Adding Comments and Using the System Namespace QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.07 - Improve programs by adding comments and using the System namespace DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

29. What is of the following NOT a keyword by the C# language? a. implicit b. catch c. static d. global ANSWER: FEEDBACK:

d

a. Incorrect. The word implicit is a keyword in C#. Keywords are predefined and reserved identifiers that have special meaning in a language. b. Incorrect. The word catch is a keyword in C#. Keywords are predefined and reserved identifiers that have special meaning in a language. c. Incorrect. The word static is a keyword in C#. Keywords are predefined and reserved identifiers that have special meaning in a language. d. Correct. The word global is not a keyword in C#. Keywords are predefined

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and reserved identifiers that have special meaning in a language.

POINTS: 1 REFERENCES: Selecting Identifiers QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.06 - Select identifiers to use within your programs DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

30. What statement regarding the C# programming language is accurate? a. The C# programming language was developed as a procedural language. b. C# only allows specific pieces of data to be treated as objects. c. C# provides constructs for creating components with properties, methods, and events. d. C# is modeled after the COBOL programming language.

ANSWER: FEEDBACK:

c

a. Incorrect. C# is an object-oriented and component-oriented programming language. b. Incorrect. Unlike other programming languages, C# allows every piece of data to be treated as an object and to consistently employ the principles of objectoriented programming. c. Correct. C# provides constructs for creating components with properties, methods, and events, making it an ideal language for modern programming, where building small, reusable components is more important than building huge, stand-alone applications. d. Incorrect. C# is modeled after the C++ programming language but is considered easier to learn. Some of the most difficult features to understand in C++ have been eliminated in C#.

POINTS: 1 REFERENCES: The C# Programming Language QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.04 - Describe the C# programming language DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

Match each item with a statement below: a. syntax b. logical error c. command line d. command prompt e. state of an object f. interface g. literal string h. inheritance Copyright Cengage Learning. Powered by Cognero.

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i. whitespace j. just in time compiler REFERENCES: Glossary QUESTION TYPE: Matching HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.01.01 - Describe the programming process MVC#.FARR.18.01.02 - Differentiate between procedural and object-oriented programming MVC#.FARR.18.01.03 - Describe the features of object-oriented programming languages MVC#.FARR.18.01.05 - Write a C# program that produces output MVC#.FARR.18.01.08 - Compile and execute a C# program using the command prompt and using Visual Studio DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

31. The rules of a high-level programming language ANSWER: a POINTS: 1

32. Adding when you should be multiplying ANSWER: b POINTS: 1

33. The line on which you type a command in a system that uses a text interface ANSWER: c POINTS: 1

34. A request for input that appears at the beginning of the command line ANSWER: d POINTS: 1

35. The value of an object's attributes at any point in time ANSWER: e POINTS: 1

36. The description of interaction between a method and an object ANSWER: f POINTS: 1

37. A series of characters that will be used exactly as entered ANSWER: g POINTS: 1

38. The ability to extend a class to create a more specific class ANSWER: h POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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39. Any combination of spaces, tabs, and carriage returns (blank lines) ANSWER: i POINTS: 1

40. Translates intermediate code into executable code ANSWER: j POINTS: 1

41. What are the attributes and state of an object?

ANSWER: Object-oriented programming (OOP) is an extension of procedural programming.

OOP uses variables and methods like procedural programs do, but it focuses on objects. An object is a concrete entity that has attributes and behaviors. The attributes of an object are the features it "has"; the values of an object's attributes constitute the state of the object. For example, attributes of a paycheck include its payee and monetary value, and the state of those attributes might be "Alice Nelson" and $400.

POINTS: 1 REFERENCES: Procedural and Object-Oriented Programming QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.01.02 - Differentiate between procedural and object-oriented programming DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

42. Explain the concept of methods in object-oriented programming.

ANSWER: For convenience, the individual operations used in a computer program often are grouped into logical units called methods. For example, a series of four or five comparisons and calculations that together determine an employee's federal tax withholding value might be grouped as a method named CalculateFederalWithholding().

POINTS: 1 REFERENCES: Procedural and Object-Oriented Programming QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.01.02 - Differentiate between procedural and object-oriented programming DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

43. What are the features supported by object-oriented programming?

ANSWER: For a language to be considered object-oriented, it must support the following features: * Classes * Objects * Encapsulation and Interfaces Copyright Cengage Learning. Powered by Cognero.

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* Inheritance * Polymorphism POINTS: 1 REFERENCES: Features of Object-Oriented Programming Languages QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.01.03 - Describe the features of object-oriented programming languages DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

44. Explain the main characteristics of encapsulation.

ANSWER: Like procedural programs, object-oriented programs have variables (attributes) and procedures (methods), but the attributes and methods are encapsulated into objects that are then used much like real-world objects. Encapsulation is the technique of packaging an object's attributes and methods into a cohesive unit that can be used as an undivided entity. Programmers sometimes refer to encapsulation as using a "black box," a device you use without regard for the internal mechanisms. If an object's methods are well written, the user is unaware of the low-level details of how the methods are executed; in such a case, the user must understand only the interface or interaction between the method and object. For example, if you can fill your Automobile with gasoline, it is because you understand the interface between the gas pump nozzle and the vehicle's gas tank opening. You don't need to understand how the pump works or where the gas tank is located inside your vehicle. If you can read your speedometer, it does not matter how the display figure is calculated. In fact, if someone produces a new, more accurate speedometer and inserts it into your Automobile, you don't have to know or care how it operates, as long as the interface remains the same as the previous one. The same principles apply to well-constructed objects used in object-oriented programs.

POINTS: 1 REFERENCES: Features of Object-Oriented Programming Languages QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.01.03 - Describe the features of object-oriented programming languages DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

45. Explain the main characteristics of inheritance.

ANSWER: Inheritance provides the ability to extend a class so as to create a more specific class.

The more specific class contains all the attributes and methods of the more general class, and usually contains new attributes or methods as well. For example, if you have created a Dog class, you might then create a more specific class named ShowDog. Each instance of the ShowDog class would contain all the attributes and methods of a Dog, along with additional methods or attributes.

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POINTS: 1 REFERENCES: Features of Object-Oriented Programming Languages QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.01.03 - Describe the features of object-oriented programming languages DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

46. How would you compare C# with Java?

ANSWER: C# is very similar to Java because Java was also based on C++. However, C# is more truly object-oriented. Unlike in Java, every piece of data in C# is an object, providing all data with increased functionality. In Java, simple data types are not objects; therefore, they do not work with built-in methods. Additionally, in Java, data can only be passed to and from methods using a copy; C# omits this limitation.

POINTS: 1 REFERENCES: The C# Programming Language QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.01.04 - Describe the C# programming language DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

47. What are the components of a C# method?

ANSWER: Every method in C# contains a header and a body. A method header includes the method name and information about what will pass into and be returned from a method. The method body of every method is contained within a pair of curly braces and includes all the instructions executed by the method.

POINTS: 1 REFERENCES: Writing a C# Program that Produces Output QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.01.05 - Write a C# program that produces output DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

48. What is the meaning of the keyword static in C# in a method header?

ANSWER: In C#, the reserved keyword static indicates that the method will be executed through a class-not by a variety of objects. It means that you do not need to create an object to use the method; rather, the method is invoked using the class name.

POINTS: REFERENCES:

1 Writing a C# Program that Produces Output

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QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.01.05 - Write a C# program that produces output DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

49. What are the requirements when choosing an identifier for a C# class?

ANSWER: You can define a C# class using any identifier you need, as long as it meets the following requirements: * An identifier must begin with an underscore, the "at" sign (@), or a letter. (Letters include foreign-alphabet letters, which are contained in the set of characters known as Unicode.) * An identifier can contain only letters, digits, underscores, and the "at" sign (@). It cannot contain spaces or any other punctuation or special characters such as #, $, or &. * An identifier cannot be a C# reserved keyword, such as class or void.

(Actually, you can use a keyword as an identifier if you precede it with an "at" sign, as in @class. An identifier with an @ prefix is a verbatim identifier. This feature allows you to use code written in other languages that do not have the same set of reserved keywords. However, when you write original C# programs, you should not use the keywords as identifiers.)

POINTS: 1 REFERENCES: Selecting Identifiers QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.01.06 - Select identifiers to use within your programs DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

50. What are the types of comments supported by C#?

ANSWER: There are three types of comments in C#: * Line comments start with two forward slashes (//) and continue to the end of the current line. Line comments can appear on a line by themselves, or they can occupy part of a line following executable code. * Block comments start with a forward slash and an asterisk (/*) and end with an asterisk and a forward slash (*/ ). Block comments can appear on a line by themselves, on a line before executable code, or after executable code. When a comment is long, block comments can extend across as many lines as needed. * C# also supports a special type of comment used to create documentation from within a program. These comments, called XML-documentation format comments, use a special set of tags within angle brackets (<>). (XML stands for Extensible Markup Language.)

POINTS: REFERENCES:

1 Improving Programs by Adding Comments and Using the System Namespace

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QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.01.07 - Improve programs by adding comments and using the System namespace DATE CREATED: 5/16/2017 12:52 PM DATE MODIFIED: 11/15/2019 3:43 PM

Zargham Haider 0341-5913900 zarghamh986@gmail.com

Academic Qualification

UNIVERSITY OF AGRICULTURE FAISALABAD Faisalabad, Pakistan M.Phil Mathematics 3.82/4 UNIVERSITY OF AGRICULTURE FAISALABAD Faisalabad, Pakistan Master of Science 3.70/4 UNIVERSITY OF PUNJAB , LAHORE Lahore, Pakistan Bachelor of Science 440/800

2022 2019 2016

Thesis (6 Credit Hours – MPhil)

Turun type inequalities on some special functions: BESSEL MAITLAND function

Experience Bright Way Education School System (Hafizabad Campus ) (Admin Officer ) 3 October 2019 to 5 September 2022 Government College University Faisalabad (Hafizabad Campus) (Visiting Lecturer) Hafizabad, Pakistan October 2022 to Present – Lecturer Mathematics – Team leader of BS Mathematics

Computer skills – – – –

– – – –

MS Word MS PowerPoint MS Exell Python & R

Internet User Email Sending/ Receiving Social media working Research on Internet

Certificates Microsoft Office – Microsoft Excel, Microsoft Word and Microsoft PowerPoint

Personal Details_____________________________________________________________

Father’s Name: Religion: CNIC:

Muhammad Zafar Islam 34301-7695275-7

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Date of Birth: Address:

Date:

April 06, 1996 Village Phullo Chragh Shah, Tehsil and District Hafizabad, Punjab, Pakistan.

Hafizabad English, Chinese, Urdu and Punjabi.

Domicile: Languages:

1. The equal sign (=) is the C# assignment operator. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. The equal sign (=) is the assignment operator. Any value to the right of the assignment operator is assigned to the identifier to the left.

Incorrect Incorrect. The equal sign (=) is the assignment operator. Any value to the right of the assignment operator is assigned to the identifier to the left.

POINTS: 1 REFERENCES: Declaring Variables QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.01 - Declare variables DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

2. You can concatenate two strings with the plus (+) sign. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. When you concatenate a string with another value, you join the values with a plus sign.

Incorrect Incorrect. When you concatenate a string with another value, you join the values with a plus sign.

POINTS: 1 REFERENCES: Displaying Variable Values QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.02 - Display variable values DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

3. Operator precedence rules ensure that addition and subtraction always take place prior to multiplication, division, or remainder in an expression. a. True b. False Copyright Cengage Learning. Powered by Cognero.

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False Correct

Correct. When you combine mathematical operations in a single statement, you must understand operator precedence, or the rules that determine the order in which parts of a mathematical expression are evaluated. Multiplication, division, and remainder always take place prior to addition or subtraction in an expression.

Incorrect Incorrect. When you combine mathematical operations in a single statement, you must understand operator precedence, or the rules that determine the order in which parts of a mathematical expression are evaluated. Multiplication, division, and remainder always take place prior to addition or subtraction in an expression.

POINTS: 1 REFERENCES: Using Arithmetic Operators QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.05 - Use arithmetic operators DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

4. someValue++ is an example of the use of the prefix increment operator. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. To use a prefix increment operator, you type two plus signs before the variable name.

Incorrect Incorrect. To use a prefix increment operator, you type two plus signs before the variable name.

POINTS: 1 REFERENCES: Using Arithmetic Operators QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.05 - Use arithmetic operators DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

5. An escape sequence is used to represent special characters such as a carriage return or a tab, and always begins with a backslash. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. You can store any character—including nonprinting characters such as a backspace or a tab—in a char variable. To store these characters, you use two symbols in an escape sequence, which always begins with a backslash. The pair of symbols represents a single character.

Incorrect Incorrect. You can store any character—including nonprinting characters such as a backspace or a tab—in a char variable. To store these characters, you use two symbols in an escape sequence, which always begins with a backslash. The pair of symbols represents a single character.

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POINTS: 1 REFERENCES: Using the char Data Type QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.08 - Use the char data type DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

6. What is the term for a named location in computer memory that can hold different values at different points in time? a. variable b. constant c. literal constant d. alias ANSWER: FEEDBACK:

a

a. Correct. A variable is a named location in computer memory that can hold different values at different points in time. b. Incorrect. A data item is constant when it cannot be changed after a program is compiled—in other words, when it cannot vary. c. Incorrect. A literal constant is a value that is taken literally at each use.

d. Incorrect. An alias is another name for something.

POINTS: 1 REFERENCES: Declaring Variables QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.01 - Declare variables DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

7. An assignment that is made when a variable is declared is known as what? a. A definition of the variable b. An allocation of the variable c. An assignment to the variable d. An initialization of the variable ANSWER: FEEDBACK:

d

a. Incorrect. By definition, a variable is a named location in computer memory that can hold different values at different points in time. b. Incorrect. An allocation is the distribution of something; the term does not have a conventional meaning with variables. c. Incorrect. The assignment after the declaration of a variable is simply an assignment. Thus, an assignment does not include the data type, as it is only used in a declaration. d. Correct. An assignment made when a variable is declared is an initialization.

POINTS:

1

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REFERENCES: Declaring Variables QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.01 - Declare variables DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

8. What is the name for a series of characters used to control the appearance of text output? a. A declared namespace b. A set placeholder c. A defined format string d. Carefully placed whitespace ANSWER: FEEDBACK:

c

a. Incorrect. A namespace is a construct that acts like a container to provide a way to group similar classes. b. Incorrect. A placeholder holds a position for a variable value within a string. It consists of a pair of curly braces containing a number that indicates the desired variable’s position in a list that follows the string. c. Correct. A format string is a string of characters that controls the appearance of output. d. Incorrect. Whitespace is any combination of spaces, tabs, and carriage returns (blank lines). You use whitespace to organize your program code and make it easier to read.

POINTS: 1 REFERENCES: Displaying Variable Values QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.02 - Display variable values DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

9. What uses curly braces containing a number that indicates the desired position for a variable in a list that follows a string used for formatting purposes? a. format string b. whitespace c. namespace d. placeholder ANSWER: FEEDBACK:

d

a. Incorrect. A format string is a string of characters that controls the appearance of output. It optionally contains fixed text and contains one or more format items or placeholders for variable values. b. Incorrect. Whitespace is any combination of spaces, tabs, and carriage returns (blank lines). You use whitespace to organize your program code and make it easier to read. c. Incorrect. A namespace is a construct that acts like a container to provide a way to group similar classes.

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d. Correct. A placeholder holds a position for a variable value within a string. It consists of a pair of curly braces containing a number that indicates the desired variable’s position in a list that follows the string.

POINTS: 1 REFERENCES: Displaying Variable Values QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.02 - Display variable values DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

10. What type of number can be described as having varying numbers of significant digits, which contains decimal positions? a. integer b. whole c. floating-point d. int ANSWER: FEEDBACK:

c

a. Incorrect. Integers are whole numbers without any fractional parts. b. Incorrect. A whole number is an integer without any fractional parts. c. Correct. A floating-point number is one that contains decimal positions. Floatingpoint numbers are described as having varying numbers of significant digits.

d. Incorrect. The data type int holds a whole number without any fractional parts.

POINTS: 1 REFERENCES: Using Floating-Point Data Types QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.04 - Use floating-point data types DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

11. In the C# statement moneyString = someMoney.ToString("F3"), what is "F3" an example of? a. literal constant b. standard numeric format string c. named constant d. intrinsic type ANSWER: FEEDBACK:

b

a. Incorrect. A literal constant is a value that is taken literally at each use. b. Correct. Standard numeric format strings are strings of characters expressed within double quotation marks that indicate a format for output. c. Incorrect. A named constant is an identifier whose value must be assigned upon declaration and whose contents cannot change.

d. Incorrect. Intrinsic types of data are basic types. C# provides 15 intrinsic types.

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The most commonly used are int, double, decimal, char, string, and bool.

POINTS: 1 REFERENCES: Using Floating-Point Data Types QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.04 - Use floating-point data types DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

12. What type of arithmetic operator has one argument to the left and another argument to the right of the operator? a. binary b. complex c. composite d. unary ANSWER: FEEDBACK:

a

a. Correct. Binary operators use two operands—one value to the left of the operator and another value to the right of it. b. Incorrect. There are no complex operators.

c. Incorrect. A composite operator is not an arithmetic operator. d. Incorrect. Unary operators are operators used with one operand.

POINTS: 1 REFERENCES: Using Arithmetic Operators QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.05 - Use arithmetic operators DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

13. In C#, += adds the operand on the right to the operand on the left and assigns it to the operand on the left in one step. What is the name for this operator? a. prefix increment b. postfix increment c. add and assign d. increment and assign ANSWER: FEEDBACK:

c

a. Incorrect. The prefix increment operator (++ before a variable) increases the

variable’s value by 1 and then evaluates it. b. Incorrect. The postfix increment operator (++ after a variable) evaluates a variable and then adds 1 to it. c. Correct. The += operator is the add and assign operator. It adds the operand on the right to the operand on the left and assigns the result to the operand on the Copyright Cengage Learning. Powered by Cognero.

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left in one step. d. Incorrect. Incrementing a variable increases the value by 1.

POINTS: 1 REFERENCES: Using Arithmetic Operators QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.05 - Use arithmetic operators DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

14. What type of operator can be used to reduce a variable's value by 1 either at time of evaluation, or after it is evaluated, depending on placement? a. increment operator b. sub and assign operator c. add and assign operator d. decrement operator ANSWER: FEEDBACK:

d

a. Incorrect. An increment operator increases a variable's value by 1. b. Incorrect. The –= operator is the subtract and assign operator. It subtracts the operand on the right from the operand on the left and assigns the result to the operand on the left in one step. c. Incorrect. The += operator is the add and assign operator. It adds the operand on the right to the operand on the left and assigns the result to the operand on the left in one step.

d. Correct. A prefix or postfix decrement operator (– –) reduces a variable’s value by 1.

POINTS: 1 REFERENCES: Using Arithmetic Operators QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.05 - Use arithmetic operators DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

15. How is a Boolean variable declared in a program? a. A char type variable must be declared, optionally followed by a bool value. b. A bool type variable must be declared, optionally followed by a bool value. c. An int type variable must be declared, optionally followed by a bool value. d. A boolean type variable must be declared, optionally followed by a bool value.

ANSWER: FEEDBACK:

b

a. Incorrect. A char type cannot hold a bool value because a char can only hold single characters and a boolean value is either true or false.

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b. Correct. A bool type holds bool values. c. Incorrect. An int type cannot hold a bool value because an int can only hold integers and a boolean value is either true or false. d. Incorrect. The data type used to declare a Boolean variable is a bool type, not a boolean type.

POINTS: 1 REFERENCES: Using the bool Data Type QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.06 - Use the bool data type DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

16. What type of expression has a Boolean value as a result? a. decrement b. comparison c. assignment d. unifying ANSWER: FEEDBACK:

b

a. Incorrect. A decrement expression reduces a variable's value by 1. Thus, a decrement cannot return a Boolean value of true or false. b. Correct. A comparison operator compares two items. An expression containing a comparison operator has a Boolean value.

c. Incorrect. An assignment expression assigns a value to a variable. d. Incorrect. A unifying type is the type chosen for an arithmetic result when operands are of dissimilar types.

POINTS: 1 REFERENCES: Using the bool Data Type QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.06 - Use the bool data type DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

17. When using arithmetic operations with operands of dissimilar types, an automatic conversion of nonconforming operands to a unifying type occurs. What is this conversion process called? a. implicit cast b. explicit cast c. manual cast d. level cast ANSWER: FEEDBACK:

a

a. Correct. An implicit cast is the automatic transformation that occurs when a value is assigned to a type with higher precedence.

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b. Incorrect. An explicit cast purposefully assigns a value to a different data type. It involves placing the desired result type in parentheses followed by the variable or constant to be cast. c. Incorrect. This is manual, not automatic.

d. Incorrect. Level cast is not a term used by C# programmers.

POINTS: 1 REFERENCES: Understanding Numeric Type Conversion QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.07 - Describe numeric type conversion DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

18. You are performing an arithmetic operation and have placed the desired result type in parentheses followed by a variable to be cast with the result. What is this an example of? a. implicit casting b. automatic casting c. intrinsic casting d. explicit casting ANSWER: FEEDBACK:

d

a. Incorrect. An implicit cast is the automatic transformation that occurs when a value is assigned to a type with higher precedence. b. Incorrect. Automatic casting is known as implicit casting, which is the automatic transformation that occurs when a value is assigned to a type with higher precedence.

c. Incorrect. Intrinsic is a basic type of data. The ones most commonly used are int, double, decimal, char, string, and bool. d. Correct. An explicit cast purposefully assigns a value to a different data type. It involves placing the desired result type in parentheses followed by the variable or constant to be cast.

POINTS: 1 REFERENCES: Understanding Numeric Type Conversion QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.07 - Describe numeric type conversion DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

19. What data type can be used to hold any single character, including numbers and non-printing characters? a. char b. string c. bool d. int ANSWER:

a

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a. Correct. The char data type can hold any single character, such as A or 2. b. Incorrect. A string data type holds a series of characters. For example, "Hello" is a string data type. c. Incorrect. A bool data type can hold only one of two values, true or false. d. Incorrect. An intdata type can hold whole numbers. For example, the number 33 is an int data type.

FEEDBACK:

POINTS: 1 REFERENCES: Using the char Data Type QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.08 - Use the char data type DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

20. What data type can be used to hold a series of characters? a. int b. string c. sbyte d. char ANSWER: FEEDBACK:

b

a. Incorrect. An int data type can hold whole numbers. For example, the number 15 is an int data type. b. Correct. A string data type holds a series of characters. For example, "Hello" is a string data type. c. Incorrect. An sbyte is an integral data type that can hold a signed numeric value from –128 through 127. d. Incorrect. The char data type can hold any single character, such as A or 2.

POINTS: 1 REFERENCES: Using the string Data Type QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.09 - Use the string data type DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

21. What keyword can be used to create a named identifier for a memory location whose contents cannot change? a. final b. static c. const d. fix ANSWER:

c

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a. Incorrect. The keyword final is not an identifier. b. Incorrect. The keyword static indicates that a method will be executed

FEEDBACK:

through a class, not by a variety of objects. c. Correct. You create a named constant by adding the keyword const before the data type in a declaration. d. Incorrect. The word fix is not a C# keyword.

POINTS: 1 REFERENCES: Defining Named Constants QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.10 - Define named constants and enumerations DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

22. What type of program specifically allows and accepts user input? a. interactive program b. static program c. constant program d. procedural program ANSWER: FEEDBACK:

a

a. Correct. A program that allows user input is an interactive program. b. Incorrect. The keyword static indicates a method is used with a class and not an object. c. Incorrect.The term constant is not used to describe programs. A constant is a named memory location whose value never varies.

d. Incorrect. A procedural program is created by writing a series of steps or operations to manipulate values.

POINTS: 1 REFERENCES: Accepting Console Input QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.11 - Accept console input DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

23. What method can be used to accept user input from the keyboard on the console? a. Next() b. NextLine() c. ReadLine() d. Input() ANSWER: FEEDBACK:

c

a. Incorrect. Next()is a method that returns a non-negative random integer.

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b. Incorrect. NextLine() is not a built-in C# method. c. Correct. You can use the ReadLine() method to create an interactive program that accepts user input from the keyboard. d. Incorrect. Input()is not a built-in C# method.

POINTS: 1 REFERENCES: Accepting Console Input QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.11 - Accept console input DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

24. When running a program, an instruction to the user to enter data for the program to process is known by what term? a. line b. prompt c. cue d. hint ANSWER: FEEDBACK:

b

a. Incorrect. A line is a line of code. b. Correct. A prompt is an instruction to the user to enter data. c. Incorrect. An instruction to the user to enter data is not referred to as a cue. d. Incorrect. A hint is a suggestion and does not instruct a user to enter data.

POINTS: 1 REFERENCES: Accepting Console Input QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.11 - Accept console input DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

25. What method from the Convert class can be used to convert a specified value to an 8-bit unsigned integer? a. ToDecimal() b. ToSingle() c. ToInt16() d. ToByte() ANSWER: FEEDBACK:

d

a. Incorrect. ToDecimal() converts a specified value to a decimal number. b. Incorrect. ToSingle() converts a specified value to a single-precision floating-point number. c. Incorrect. ToInt16() converts a specified value to a 16-bit signed integer (a

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short). d. Correct. ToByte() converts a specified value to an 8-bit unsigned integer.

POINTS: 1 REFERENCES: Accepting Console Input QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.11 - Accept console input DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

26. What method can be used as an alternative to the Convert class methods to change a string into a number? a. Cast() b. Parse() c. Assign() d. Write() ANSWER: FEEDBACK:

b

a. Incorrect. Cast represents a conversion, but Cast() is not a built-in method. b. Correct. The Parse() method converts a string to a number. c. Incorrect. Assign() is not a built-in method. d. Incorrect. The Write() method is used to display variable values.

POINTS: 1 REFERENCES: Accepting Console Input QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.11 - Accept console input DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

27. What happens when "string1" is added to "string2" using the + sign in the C# programming language? a. The strings are concatenated together. b. The strings are converted to integer equivalents and then added together. c. The result is returned as a Boolean value. d. A type error occurs, and the program is halted.

ANSWER: FEEDBACK:

a

a. Correct. When you concatenate a string with another value, you join the values with a plus sign. b. Incorrect. The plus sign does not indicate that the values should be added together. The plus sign between strings concatenates them. c. Incorrect. The plus sign does not indicate a comparison between the two strings, and so a Boolean value is not returned. d. Incorrect. The plus sign will not result in an error because it is used to combine two values.

POINTS:

1

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REFERENCES: Displaying Variable Values QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.02 - Display variable values DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

28. What is NOT part of a variable declaration in the C# programming language? a. The data type the variable will store. b. The variable's name. c. An optional assignment operator and assigned value. d. The variable's associated parent class.

ANSWER: FEEDBACK:

d

a. Incorrect. When declaring a variable, the programmer must determine the data type that the variable will store. b. Incorrect. When declaring a variable, the programmer must name the variable, which is its identifier. c. Incorrect. When declaring a variable, the programmer can include the assignment operator (=) and an assigned value (but is not required to do so). d. Correct. When declaring a variable, a parent class is not required.

POINTS: 1 REFERENCES: Declaring Variables QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.01 - Declare variables DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

29. What operator is used for exponentials in the C# programming language? a. ^ b. % c. * d. None of the above.

ANSWER: FEEDBACK:

d

a. Incorrect. The operator ^ is a logical XOR operator. b. Incorrect. The operator % determines the remainder in integer division. For example, the result of 45%2 is 1. c. Incorrect. The operator * represent multiplication. For example, the result of 3*2 is 6. d. Correct. C# does not have an exponential operator. Instead, you can use the builtin method Math.Pow().

POINTS: REFERENCES:

1 Using Arithmetic Operators

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QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.05 - Use arithmetic operators DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

30. What statement regarding operator precedence is accurate? a. Multiplication, division, and addition always take place prior to the calculation of a remainder. b. Operations that are placed in parentheses are evaluated first. c. Operations are always evaluated left to right, regardless of the expressions. d. Addition and subtraction operations are evaluated first.

ANSWER: FEEDBACK:

b

a. Incorrect. Multiplication, division, and remainder always take place prior to addition or subtraction in an expression. b. Correct. The order of operations for arithmetic operators indicates that parentheses should be evaluate first. c. Incorrect. First, evaluate expressions within parentheses. Second, evaluate multiplication, division, and remainder from left to right. Finally, evaluate addition and subtraction from left to right. d. Incorrect. Addition and subtraction should be evaluated last unless they are enclosed in parentheses.

POINTS: 1 REFERENCES: Using Arithmetic Operators QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.02.05 - Use arithmetic operators DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

Match each item with a statement below. a. data type b. integral data type c. precision specifier d. culture e. operator precedence f. Boolean variable g. comparison operator h. Unicode i. named constant j. unary operator REFERENCES: QUESTION TYPE: HAS VARIABLES:

Glossary Matching False

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LEARNING OBJECTIVES: MVC#.FARR.18.02.01 - Declare variables MVC#.FARR.18.02.03 - Use integral data types MVC#.FARR.18.02.04 - Use floating-point data types MVC#.FARR.18.02.05 - Use arithmetic operators MVC#.FARR.18.02.06 - Use the bool data type MVC#.FARR.18.02.08 - Use the char data type MVC#.FARR.18.02.09 - Use the string data type MVC#.FARR.18.02.10 - Define named constants and enumerations DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

31. Describes the format and size (amount of memory occupied) of a data item and defines a set of relevant operations ANSWER: a POINTS: 1

32. Used to store a whole number ANSWER: b POINTS: 1

33. Controls the number of significant digits or zeros to the right of a decimal point ANSWER: c POINTS: 1

34. A set of rules that determines how to format values such as money and dates that can be represented differently based on locale and tradition ANSWER: d POINTS: 1

35. Rules that determine the order in which parts of a mathematical expression are evaluated ANSWER: e POINTS: 1

36. Can hold only one of two values: true or false ANSWER: f POINTS: 1

37. The use of <= or similar operators, for example.

ANSWER: g POINTS: 1

38. A 16-bit coding scheme for characters ANSWER: h POINTS: 1

39. An identifier whose contents cannot change ANSWER: i Copyright Cengage Learning. Powered by Cognero.

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POINTS: 1

40. The prefix and postfix increment operators are both examples of this type of operator.

ANSWER: j POINTS: 1

41. What is a variable declaration, what is its purpose, and what does the declaration include?

ANSWER: A variable declaration is the statement that names a variable and reserves storage for it. The declaration includes: * The data type that the variable will store * The variable name (its identifier) * An optional assignment operator and assigned value when you want a variable to contain an initial value * An ending semicolon POINTS: 1 REFERENCES: Declaring Variables QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.02.01 - Declare variables DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

42. What are the nine integral data types in C# and how do you decide which is the most appropriate to use in a particular situation?

ANSWER: The nine types are byte, sbyte, short, ushort, int, uint, long, ulong, and char. The first eight always represent whole numbers, and the ninth type, char, is used for characters like 'A' or 'a'.

The most basic of the integral types is int. An int uses four bytes of memory and can hold any whole number value ranging from 2,147,483,647 down to 2,147,483,648. Many programmers use int for most whole numbers. If you want to save memory and know you need only a small value, you can use one of the shorter integer types-byte, sbyte (which stands for signed byte), short (short int), or ushort (unsigned short int). For example, a payroll program might contain a variable named numberOfDependents that is declared as type byte, because numberOfDependents will never need to hold a negative value or a value exceeding 255; for that reason, you can allocate just one byte of storage to hold the value. If you use a type that is too large, you waste storage. If you use a type that is too small, your program won't compile.

POINTS: 1 REFERENCES: Using the Integral Data Types QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.02.03 - Use integral data types Copyright Cengage Learning. Powered by Cognero.

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43. What are the three floating-point data types in C#? Briefly describe the characteristics of each type.

ANSWER: A floating-point number is one that contains decimal positions. C# supports three floating-point data types: float, double, and decimal. A float data type can hold as many as seven significant digits of accuracy. A double data type can hold 15 or 16 significant digits of accuracy. Compared to floats and doubles, the decimal type has a greater precision and a smaller range, which makes it suitable for financial and monetary calculations. For example, a decimal given the value 123456789.987654321 will appear as 123456789.987654321 (notice that it is accurate to the rightmost digit). A decimal cannot hold as large a value as a double can, but it can be accurate to more decimal places.

POINTS: 1 REFERENCES: Using Floating-Point Data Types QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.02.04 - Use floating-point data types DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

44. Explain how to use the C# shortcut arithmetic operators -=, *=, and /=.

ANSWER: Each of these operators is used to perform an operation and assign the result in one step. For example: balanceDue -= payment subtracts a payment from balanceDue and assigns the result to balanceDue. rate *= 100 multiplies rate by 100 and assigns the result to rate. For example, this could be used to convert a fractional value stored in rate, such as 0.27, to a whole number, such as 27. payment /= 12 divides payment by 12 and assigns the result to payment. This could be used to change a payment value from an annual amount to a monthly amount due.

POINTS: 1 REFERENCES: Using Arithmetic Operators QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.02.05 - Use arithmetic operators DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

45. What are the differences between the prefix increment operator and postfix increment operator?

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When you only want to increase a variable's value by 1, there is no apparent difference between using the prefix and postfix increment operators. However, these operators function differently. When you use the prefix ++, the result is calculated and stored, and then the variable is used. In contrast, when you use the postfix ++, the variable is used, and then the result is calculated and stored.

POINTS: 1 REFERENCES: Using Arithmetic Operators QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.02.05 - Use arithmetic operators DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

46. Explain why implicit numeric conversions are necessary and how C# chooses operands to convert.

ANSWER: When you perform arithmetic with variables of the same type, the result of the arithmetic retains that type. For example, when you divide two ints, the result is an int. Often, however, you need to perform mathematical operations on different types. For example, you might need to multiply an int by a double. In this case, C# chooses a unifying type for the result and implicitly converts nonconforming operands to the unifying type, which is the type with the higher type precedence. In the case of multiplying an int by a double, the result will be a double.

POINTS: 1 REFERENCES: Understanding Numeric Type Conversion QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.02.07 - Describe numeric type conversion DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

47. How can you compare strings using the Compare() method?

ANSWER: The Compare() method requires two string arguments and returns an integer result. When it returns 0, the two strings are equivalent; when it returns a positive number, the first string is greater than the second; and when it returns a negative number, the first string is less than the second. A string is considered equal to, greater than, or less than another string lexically, which in the case of letter values means alphabetically. That is, when you compare two strings, you compare each character in turn from left to right. If each Unicode value is the same, then the strings are equivalent. If any corresponding character values are different, the string that has the greater Unicode value earlier in the string is considered greater.

POINTS: REFERENCES: QUESTION TYPE:

1 Using the string Data Type Subjective Short Answer

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HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.02.09 - Use the string data type DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

48. How is a named constant different from a variable? How would you create a named constant (and show an example)?

ANSWER: By definition, a variable's value can vary, or change. Sometimes you want to create a named constant (often simply called a constant), an identifier whose contents cannot change. You create a named constant similar to the way you create a named variable, but by using the keyword const. Although there is no requirement to do so, programmers usually name constants using all uppercase letters, inserting underscores for readability. This convention makes constant names stand out so that the reader is less likely to confuse them with changeable variable names. For example, the following declares a constant named TAX_RATE that is assigned a value of 0.06: const double TAX_RATE = 0.06; POINTS: 1 REFERENCES: Defining Named Constants QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.02.10 - Define named constants and enumerations DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

49. What is an enumeration and what are the advantages of creating an enumeration type? Show an example of an enumeration definition.

ANSWER: An enumeration is a set of constants represented by identifiers. An example of an enumeration definition is the following: enum DayOfWeek { SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY } Creating an enumeration type provides several advantages. For example, the DayOfWeek type above improves a program as follows: 1. Only the seven allowed values can be assigned to a DayOfWeek object.

2. Using an enumeration type makes a program type-safe (for example, you couldn't use an integer method such as addition on an object of type DayOfWeek).

3. The enum constants provide clearer self-documentation (it is more apparent what you mean when you assign a variable the value WEDNESDAY rather than the number 4, for example).

POINTS:

1

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REFERENCES: Defining Named Constants QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.02.10 - Define named constants and enumerations DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

50. What is the purpose of the ReadLine() method? How would you use it with a variable of type string?

How would you use it with a variable of type double?

ANSWER: You use the ReadLine() method to accept user input from the keyboard. This method accepts all of the characters entered by a user until the user presses Enter.

The characters can be assigned directly to a string. For example, the following statement accepts a user's input and stores it in the variable myString: myString = ReadLine(); If you want to use the data as a string-for example, if the input is a word or a name-then you simply use the variable to which you assigned the value. If you want to use the data as a number, then you must use a conversion method to convert the input string to the proper type, as in: itemPrice = Convert.ToDouble(myString); POINTS: 1 REFERENCES: Accepting Console Input QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.02.11 - Accept console input DATE CREATED: 5/16/2017 1:18 PM DATE MODIFIED: 11/15/2019 3:47 PM

1. So much code is needed to create even the simplest of GUI programs that it is far more practical to develop the user interface visually in an IDE. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. When you write a console application, you can use a simple text editor such as Notepad or you can use the Visual Studio integrated development environment (IDE). Technically, you have the same options when you write a GUI program. However, so much code is needed to create even the simplest of GUI programs that it is far more practical to develop the user interface visually in the IDE. This approach allows the IDE to automatically generate much of the code you need to develop appealing GUI programs that are easy to use.

Incorrect Incorrect. When you write a console application, you can use a simple text editor such as Notepad or you can use the Visual Studio integrated development environment (IDE). Technically, you have the same options when you write a GUI program. However, so much code is needed to create even the simplest of GUI

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programs that it is far more practical to develop the user interface visually in the IDE. This approach allows the IDE to automatically generate much of the code you need to develop appealing GUI programs that are easy to use.

POINTS: 1 REFERENCES: Using GUI Objects and the Visual Studio IDE QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

2. If you change a Form's Name, you will notice differences in the visual design. a. True b. False ANSWER: FEEDBACK:

False Correct. If you change a Form’s Name, you will not notice any difference in the visual design, but all references to the form are changed in the code.

Incorrect Incorrect. If you change a Form’s Name, you will not notice any difference in the visual design, but all references to the form are changed in the code.

Correct

POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

3. You cannot relocate a control on a Form once you have added it. a. True b. False ANSWER: FEEDBACK:

False Correct. After a control is on a Form, you can relocate the control by dragging it or delete the control by selecting it and pressing the Del key on your keyboard.

Incorrect Incorrect. After a control is on a Form, you can relocate the control by dragging it or delete the control by selecting it and pressing the Del key on your keyboard.

Correct

POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.02 - Use the Toolbox to add a Button to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM Copyright Cengage Learning. Powered by Cognero.

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4. You are not required to create a Click() method for a Button. a. True b. False ANSWER: FEEDBACK:

True Correct. You are not required to create a Click() method for a Button. If, for some reason, you did not want to take any action when a user clicks a Button, you simply would not include the method in your program.

Incorrect Incorrect. You are not required to create a Click() method for a Button. If, for some reason, you did not want to take any action when a user clicks a Button, you simply would not include the method in your program.

Correct

POINTS: 1 REFERENCES: Using the Toolbox to Add a Button to a Form QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.02 - Use the Toolbox to add a Button to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

5. Professional programmers usually do not retain the default names for Forms and controls. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. Professional programmers usually do not retain the default names for Forms and controls. An exception is sometimes made for Labels that never change.

Incorrect Incorrect. Professional programmers usually do not retain the default names for Forms and controls. An exception is sometimes made for Labels that never change.

POINTS: 1 REFERENCES: Naming Forms and Controls QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.04 - Name Forms and controls DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

6. Objects such as the labels, buttons, and text boxes seen within a program's environment are all components of what part of a program? a. The program's interface. b. The program's implementation. c. The program's events. d. The program's source code.

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a

a. Correct. The environment the user sees is a program’s interface. Most modern applications use visually pleasing graphic objects to interact with users. These graphical user interface (GUI) objects include the labels, buttons, and text boxes you manipulate or control with a mouse, touch screen, or keyboard when interacting with Windows-type programs. b. Incorrect. The implementation of a program is the execution of the program.

c. Incorrect. An event is an object generated when a user interacts with a GUI object, causing the program to perform a task. d. Incorrect. The source code is the program statements.

POINTS: 1 REFERENCES: Using GUI Objects and the Visual Studio IDE QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

7. What kind of GUI object is rectangular and provides an interface for collecting, displaying, and delivering information? a. Labels b. TextBoxes c. Buttons d. Forms ANSWER: FEEDBACK:

d

a. Incorrect. A label is a control that you use to display text to communicate with an application’s user. It is not used for collecting data. b. Incorrect. A text box is a GUI control through which a user can enter input data but is not often used for delivering information. c. Incorrect. A button is a control that a user can manipulate to interact with a program. d. Correct. Forms are rectangular GUI objects that provide an interface for collecting, displaying, and delivering information.

POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

8. Labels, text boxes, and buttons that users can manipulate to interact with a program's forms are referred to by what term? a. controls b. instruments Copyright Cengage Learning. Powered by Cognero.

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c. elements d. IDEs ANSWER: FEEDBACK:

a

a. Correct. Controls are devices such as labels, text boxes, and buttons that users can manipulate to interact with a program. b. Incorrect. An instrument is not the term used to refer to labels, text boxes, and buttons that users can manipulate to interact with a program's forms. c. Incorrect. Elements are aspects of a program.

d. Incorrect. An IDE is a program development environment in which programmers select options from menus by clicking buttons.

POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

9. Where in the Visual C# IDE main window can you find the File menu, as well as submenus for editing, debugging, and help tasks? a. Toolbox tab b. menu bar c. Form Designer d. Solution Explorer ANSWER: FEEDBACK:

b

a. Incorrect. The Toolbox tab provides lists of controls you can drag onto a Form so that you can develop programs visually using a mouse or touch pad.

b. Correct. In the Visual Studio IDE, the menu bar is the list of choices that runs horizontally across the top of the screen. c. Incorrect. The Form Designer appears in the center of the screen and is where you design applications visually. d. Incorrect. The Solution Explorer is for viewing and managing project files and settings.

POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

10. What feature in the Visual C# IDE can be used for viewing and managing project files and settings? a. Properties b. Toolbox tab Copyright Cengage Learning. Powered by Cognero.

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c. Solution Explorer d. Form Designer ANSWER: FEEDBACK:

c

a. Incorrect. The Properties window is used for configuring properties and events on controls in your user interface. b. Incorrect. The Toolbox tab provides lists of controls you can drag onto a Form so that you can develop programs visually using a mouse or touch pad. c. Correct. The Solution Explorer is for viewing and managing project files and settings. d. Incorrect. The Form Designer is where you design applications visually.

POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/20/2019 9:12 AM

11. What name is given to the first form in a Windows Forms project within Visual C# by default? a. button1 b. Form1 c. TopForm1 d. Window1 ANSWER: FEEDBACK:

b

a. Incorrect. The name given to the first button on a form is button1 by default. b. Correct. When you create a Windows Forms project, Visual C# adds a form to the project and calls it Form1. c. Incorrect. TopForm1 is not the default name of the first form. d. Incorrect. Window1 is not the default name of a form.

POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

12. Where can the appearance, size, color, and window management features of a Form be modified? a. In the form's namespace. b. In the form's environment configuration file. c. In the form's properties. d. In the form's name sheet.

ANSWER:

c

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a. Incorrect. A namespace is a construct that acts like a container to provide a way to group similar classes. b. Incorrect. A form does not have an environment configuration file.

c. Correct. You can change the appearance, size, color, and window-management features of a Form by setting its properties. d. Incorrect. There are no name sheets in a Form.

POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

13. Approximately how many different properties exist within the Form class? a. 10 b. 30 c. 100 d. 300 ANSWER: FEEDBACK:

c

a. Incorrect. There are more than 10 properties within the Form class. b. Incorrect. There are more than 30 properties within the Form class. c. Correct. The Form class contains approximately 100 properties. d. Incorrect. There are fewer than 300 properties within the Form class.

POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

14. When sorting the Properties in alphabetical order in the Properties window, what entry is not in alphabetical order? a. Text b. Size c. Name d. BackColor ANSWER: FEEDBACK:

c

a. Incorrect. Text does appear in alphabetical order in the Properties window. b. Incorrect. Size does appear in alphabetical order in the Properties window. c. Correct. When you sort Properties in alphabetical order in the Properties window,

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the Name entry is not in alphabetical order—it appears near the top of the list.

d. Incorrect. BackColor does appear in alphabetical order in the Properties window.

POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

15. What form property allows you to specify the caption of the Form in the title bar? a. Name b. Property c. Text d. Label ANSWER: FEEDBACK:

c

a. Incorrect. Name is the property used to set the name of the Form. b. Incorrect. Property is not a Form property. c. Correct. Setting the Text property allows you to specify the caption of the Form in the title bar. d. Incorrect. Label is not a Form property.

POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

16. What part of a button on a form can be dragged in order to change the button's size? a. The button's text b. The button's handles c. The button's nodes d. The button's controls ANSWER: FEEDBACK:

b

a. Incorrect. You cannot drag the text to resize the button. b. Correct. You can change the size of a button by dragging its resizing handles. c. Incorrect. A node is an icon that can be used to expand or condense a list or a section of code. d. Incorrect. Controls are devices such as labels, text boxes, and buttons that users can manipulate to interact with a program.

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POINTS: 1 REFERENCES: Using the Toolbox to Add a Button to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.02 - Use the Toolbox to add a Button to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

17. After you have added a Button onto a form, what can you do in order to create a method that executes when the user clicks the Button? a. You can select the Button, then create the method. b. You can double-click the Button, and then create the method. c. You can single click the Button, and then create the method. d. You must delete the Button, and create the method first, then call the Button object by name.

ANSWER: FEEDBACK:

b

a. Incorrect. Selecting a Button does not allow you to create a method. b. Correct. After you have dragged a Button onto a Form, you can double-click it to create a method that executes when the user clicks the Button. c. Incorrect. Single clicking the Button will not allow you to create a method. d. Incorrect. The method is created after the Button is created.

POINTS: 1 REFERENCES: Using the Toolbox to Add a Button to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.02 - Use the Toolbox to add a Button to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

18. If a Button's name is reportButton, what will the default name of its Click() method be? a. reportButton_Click() b. reportButton.Click() c. report_Click() d. report.Click() ANSWER: FEEDBACK:

a

a. Correct. If a Button’s identifier is reportButton, then the name of its Click() method is reportButton_Click() using an underscore. In C# 2019, the default method will be ReportButton_Click() starting with an uppercase letter. b. Incorrect. If a Button’s identifier is reportButton, then the name of its Click() method should not contain a dot.

c. Incorrect. This is the Click() default name of a Button with the name report.

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d. Incorrect. The name, report, is not the Button's name, and the name should not include a dot.

POINTS: 1 REFERENCES: Using the Toolbox to Add a Button to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.02 - Use the Toolbox to add a Button to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

19. What serves as a control that is used to display text such as a prompt or a result of some computation? a. Form b. Button c. Label d. TextBox ANSWER: FEEDBACK:

c

a. Incorrect. Forms are rectangular GUI objects that provide an interface for collecting, displaying, and delivering information. b. Incorrect. A Button is a control that users can manipulate to interact with the program. c. Correct. A Label is a control that typically provides descriptive text for another control or displays other text information on a Form.

d. Incorrect. A TextBox is a control through which a user can enter input data in a GUI application.

POINTS: 1 REFERENCES: Adding Labels and TextBoxes to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.03 - Add Labels and TextBoxes to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

20. What Label property can be changed to display any string of text? a. Name b. Size c. Random d. Text ANSWER: FEEDBACK:

d

a. Incorrect. A Name gets or sets the name of a control. b. Incorrect. The Size property gets or sets the size of the control. c. Incorrect. Random is not a Label property. d. Correct. You can change the Text property to display any string of text.

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POINTS: 1 REFERENCES: Adding Labels and TextBoxes to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.03 - Add Labels and TextBoxes to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

21. What controls can be used to allow a user to input data in a GUI application? a. Buttons b. TextBoxes c. Labels d. Forms ANSWER: FEEDBACK:

b

a. Incorrect. Buttons do not allow a user to input data in a GUI application. b. Correct. A TextBox is a GUI control through which a user can enter input data. c. Incorrect. A Label is a control that you use to display text to communicate with an application’s user. d. Incorrect. A Form is a GUI interface for collecting, displaying, and delivering information.

POINTS: 1 REFERENCES: Adding Labels and TextBoxes to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.03 - Add Labels and TextBoxes to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

22. After a user types a value into a TextBox in an executing program, where is the value stored? a. In the Text property of the TextBox. b. In the String property of the TextBox. c. In the Label property of the TextBox. d. In the Name property of the TextBox. ANSWER: FEEDBACK:

a

a. Correct. When a user types a value into a TextBox in an executing program, it becomes the value for the Text property of the TextBox. b. Incorrect. String is not a TextBox property. c. Incorrect. Label is a control that you use to display text to communicate with an application’s user. d. Incorrect. Name property is the name of the control.

POINTS: REFERENCES:

1 Adding Labels and TextBoxes to a Form

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QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.03 - Add Labels and TextBoxes to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

23. What determines the order in which controls receive focus from successive Tab key presses? a. focus order b. TabList c. tab order d. view order ANSWER: FEEDBACK:

c

a. Incorrect. Focus order is not a term commonly used to indicate the order in which controls receive focus from successive Tab key presses. b. Incorrect. A TabList is a multi-paged control.

c. Correct. The order in which controls receive focus from successive Tab key presses is their tab order.

d. Incorrect. View order is not a term commonly used to indicate the order in which controls receive focus from successive Tab key presses.

POINTS: 1 REFERENCES: Adding Labels and TextBoxes to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.03 - Add Labels and TextBoxes to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

24. What process involves the changing of a program's internal structure without changing the way the program works? a. Editing b. Code generation c. Code modification d. Code refactoring ANSWER: FEEDBACK:

d

a. Incorrect. Editing is not the process that changes a program's internal structure. b. Incorrect. Code generation does not involve the changing of a program's internal structure. c. Incorrect. Code modification is not the process of changing a program's internal structure without changing the way the program works. d. Correct. Code refactoring is the process of changing a program's internal structure without changing the way the program works.

POINTS: REFERENCES: QUESTION TYPE:

1 Naming Forms and Controls Multiple Choice

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HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.04 - Name Forms and controls DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

25. After making a change to a program and attempting to re-run it, you get an error message stating that changes are not allowed. What can you do to clear the error? a. You must close the IDE and re-open it. b. You must press F4 to run the application. c. The application store has been corrupted, you must reinstall Visual Studio. d. You must close the previous execution of the program, then you can attempt to re-run.

ANSWER: FEEDBACK:

d

a. Incorrect. Closing the IDE will not allow you to make changes to a program. The issue is that the program is still running as you are trying to make a change. b. Incorrect. Changes are not allowed while the program is running. The issue is that the program is still running as you are trying to make a change. c. Incorrect. You do not have to reinstall Visual Studio. The issue is that the program is still running as you are trying to make a change. d. Correct. If you make a change to the program and then try to rerun it, you get an error message that indicates that changes are not allowed while the program is running. The solution is simply to close the previous execution of the application and then try again.

POINTS: 1 REFERENCES: Correcting Errors QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.05 - Correct errors DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

26. When designing an application, what type of interface generally requires more time to develop? a. User b. GUI c. Console d. TUI ANSWER: FEEDBACK:

b

a. Incorrect. User is not an interface. b. Correct. GUI programs usually take longer to develop than their console counterparts because you can spend a lot of time setting up the controls, placing them on a Form, and adjusting their sizes and relative positions before you write the code that does the actual work of the program.

c. Incorrect. Console applications look dull in comparison to GUIs, but they can often be developed more quickly because you do not spend much time setting up objects for a user to manipulate. d. Incorrect. TUI is not an interface.

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POINTS: 1 REFERENCES: Deciding Which Interface to Use QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.06 - Decide which interface to use DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

27. What property can be modified to change the tab order for a GUI component? a. TabPos b. TabNum c. TabIndex d. TabPlace ANSWER: FEEDBACK:

c

a. Incorrect. TabPos is not a property that can be modified to change the tab order. b. Incorrect. TabNum is not a property. c. Correct. By default, controls are assigned a tab order based on the order in which you place them on a Form when designing a program. The first control you place on a Form has TabIndex 0, the next control has TabIndex 1, and so on.

d. Incorrect. TabPlace is not a property.

POINTS: 1 REFERENCES: Adding Labels and TextBoxes to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.03 - Add Labels and TextBoxes to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

28. What key combination can be used to run a program without debugging it? a. Alt + F4 b. Ctrl + F5 c. Ctrl + R d. Shift + Ctrl + 1 ANSWER: FEEDBACK:

b

POINTS: REFERENCES: QUESTION TYPE:

1 Adding Labels and TextBoxes to a Form Multiple Choice

a. Incorrect. Alt + F4 closes out of the active window. b. Correct. Ctrl+F5 runs a program without debugging it. c. Incorrect. Ctrl+R refreshes the browser. d. Incorrect. Shift+Ctrl+1 does not run a program without debugging it.

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HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.03 - Add Labels and TextBoxes to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

29. What statement regarding the use of Designer.cs files is accurate? a. The Windows Form Designer can't automatically add code to the file. b. Code in the Designer.cs file represents actions that are performed when you drag and drop controls from the Toolbox. c. Changes to this file should be done manually, to ensure accuracy. d. The Designer.cs file is not visible within the IDE. ANSWER: FEEDBACK:

b

a. Incorrect. The Windows Form Designer automatically writes code in the Designer.cs file. b. Correct. The code created in the Designer.cs file implements all the actions that are performed when you drag and drop controls from the Toolbox. c. Incorrect. You should avoid making manual changes to the Designer.cs file because you could easily corrupt a program. d. Incorrect. If some of these features are not visible after you start a project in the IDE, you can select them from the View menu.

POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

30. What type of font should you use if you wish to align text values on controls? a. proportional font b. autospaced font c. monospaced font d. elongated font ANSWER: FEEDBACK:

c

a. Incorrect. A proportional font is one in which different characters have different pitches or widths. b. Incorrect. Autospaced is not a type of font.

c. Correct. A monospaced font is one in which each character occupies the same width. d. Incorrect. There is no font type called elongated font.

POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Adding Labels and TextBoxes to a Form Multiple Choice False

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LEARNING OBJECTIVES: MVC#.FARR.18.03.03 - Add Labels and TextBoxes to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

Match each item with a statement below. a. click event b. node c. menu bar d. focus e. AcceptButton f. Form Designer g. access specifier h. Toolbox tab i. Forms j. Runtime REFERENCES: Glossary QUESTION TYPE: Matching HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE MVC#.FARR.18.03.02 - Use the Toolbox to add a Button to a Form MVC#.FARR.18.03.03 - Add Labels and TextBoxes to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

31. The event generated when a user clicks a control in a GUI program ANSWER: a POINTS: 1

32. An icon that appears beside a list or a section of code and that can be expanded or condensed ANSWER: b POINTS: 1

33. Lies horizontally across the top of the IDE window, and includes submenus that list additional options ANSWER: c POINTS: 1

34. A control that has this can receive keyboard input ANSWER: d POINTS: 1

35. A Form property that gets or sets the button on the form that is clicked when the user presses the Enter key ANSWER: e POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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36. The area where you design applications visually ANSWER: f POINTS: 1

37. A keyword in a method header (for example, the keyword private) that dictates which classes can use the method ANSWER: g POINTS: 1

38. Provides lists of controls that can be dragged onto a Form so that you can develop programs visually ANSWER: h POINTS: 1

39. GUI objects that provide an interface for collecting, displaying, and delivering information ANSWER: i POINTS: 1

40. The period during which a program executes ANSWER: j POINTS: 1

41. How do you create a Form visually using the Visual Studio C# IDE? ANSWER: To create a Form visually using the IDE, you select New Project after starting Visual Studio and then choose Windows Forms Application. By default, Visual Studio names your first Windows Forms Application WindowsFormsApplication1.

You can change the name if you want, and you can browse to choose a location to save the application.

POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.03.01 - Create a Form in the Visual Studio IDE DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

42. How do you use the Toolbox to add a control to a Form?

ANSWER: When you open the IDE, the left border displays a Toolbox tab. (If you do not see the tab, you can select View and then Toolbox from the IDE's main menu.) When you open the Toolbox, a list of tool groups is displayed. The list automatically closes when you move your mouse off the list and click elsewhere, or you can pin the Toolbox to the screen by clicking the pushpin icon at the top of the list. When you pin the Toolbox, the Form moves to the right to remain fully visible. Selecting All Windows Forms at the top of the Toolbox displays a complete list of available tools; selecting Common Controls displays a smaller list that is a subset of the original one.

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This list contains many controls: the GUI objects a user can click or manipulate. The list includes controls you probably have seen when using Windows applications-for example, Button, CheckBox, and Label. You can drag these controls onto the Form.

POINTS: 1 REFERENCES: Using the Toolbox to Add a Button to a Form QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.03.02 - Use the Toolbox to add a Button to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

43. Name and describe some of the properties of Buttons.

ANSWER: Some of the properties of buttons are as follows: BackColor-Gets or sets the background color for the control Enabled-Gets or sets whether the control is enabled Font-Gets or sets the current font for the control ForeColor-Gets or sets the foreground color of the control Name-Gets or sets the name of the control Size-Gets or sets the size of the control Text-Gets or sets the text associated with the control Visible-Gets or sets a value indicating whether the control is visible POINTS: 1 REFERENCES: Creating a Form in the IDE QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.03.02 - Use the Toolbox to add a Button to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

44. Explain how to add functionality to a Button on a Form.

ANSWER: Adding functionality to a Button is easy when you use the IDE. After you have dragged a Button onto a Form, you can double-click it to create a method that executes when the user clicks the button. As you create GUI applications, you will frequently switch back and forth between the visual environment and the code. You can use the tabs or shortcut keys, or click View on the main menu and then click Code or Designer for the desired view.

If you scroll through the exposed code, you will see many generated statements, some of which are confusing. However, to make a Button perform an action, you can ignore most of the statements. You only need to write code between the curly braces of the method with the following header: private void button1_Click(object sender, EventArgs e) Copyright Cengage Learning. Powered by Cognero.

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You can write any statements between the curly braces of the button1_Click() method. For example, you can declare variables, perform arithmetic statements, and produce output. Note that in Visual Studio 2019, the method name is Button1_Click() starting with an uppercase letter.

POINTS: 1 REFERENCES: Using the Toolbox to add a Button to a Form QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.03.02 - Use the Toolbox to add a Button to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

45. What are Labels and how do you use them?

ANSWER: Labels are controls that you use to display text to communicate with an application's user. Just like a Button, you can drag a Label onto a Form. By default, the first Label you drag onto a Form is named label1. You can change its Text property to display any string of text; depending on the amount of text you enter, you might need to change the size of the Label by dragging its resizing handles or altering its Size property. If you want to create multiple lines of text on a Label, use the arrow to the right of the Text property to open an editor and type the needed text in separate lines.

POINTS: 1 REFERENCES: Adding Labels and TextBoxes to a Form QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.03.03 - Add Labels and TextBoxes to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

46. What are TextBoxes and how do you use them?

ANSWER: TextBoxes are controls through which a user can enter input data in a GUI application. If a user will enter data in a TextBox, you frequently want to start with its Text property empty, but you are allowed to add text to its Text property if desired.

When a user types a value into a TextBox in an executing program, it becomes the value for the Text property of the TextBox. Because a user might type any value, the value in a TextBox is a string by default. When you write an application in which the user is supposed to enter a number, you must convert the entered string into a number. You are familiar with this process because it's exactly the same action you must take when a user enters data in response to a ReadLine() statement in a console application.

POINTS:

1

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REFERENCES: Adding Labels and TextBoxes to a Form QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.03.03 - Add Labels and TextBoxes to a Form DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

47. What conventions are usually applied when naming Forms and controls?

ANSWER: Usually, you want to provide reasonable Name property values for all the controls you place on a Form. Although any identifier that starts with a letter is legal, note the following conventions: * Start control names with a lowercase letter and use camel casing as appropriate. * Start Form names with an uppercase letter and use camel casing as appropriate.

Form is a class and, by convention, C# class names start with an uppercase letter. * Use the type of the object in the name. For example, use names such as okButton, firstValueTextBox, or ArithmeticForm. * Professional programmers usually do not retain the default names for Forms and controls. An exception is sometimes made for Labels that never change. For example, if three labels provide directions or explanations to the user and are never altered during a program's execution, many programmers would approve of retaining their names as label1, label2, and label3.

Most often, you will want to name controls as soon as you add them to a Form. If you rename a control after you have created an event for it, the event code will generate errors. To fix this, you must refactor the code.

POINTS: 1 REFERENCES: Naming Forms and Controls QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.03.04 - Name Forms and controls DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

48. Explain how to refactor your code to fix problems after renaming a Button that already had a Click() method.

ANSWER: Code refactoring is the process of changing a program's internal structure without changing the way the program works. After you change the name of the Button using the Designer, switch to view the code. Right-click the name of the method (e.g., button1_Click()). (In Visual Studio 2019, the method name will start with an uppercase letter.) From the menu that appears, click Rename. When you click Rename, a dialog box opens. Type the new method name-for example, using the button's Name, an underscore, and Click, but not adding the parentheses that appear in the method header. When you finish, click OK. A Preview Changes dialog box will highlight the change. You can confirm the change by clicking Apply.

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POINTS: 1 REFERENCES: Naming Forms and Controls QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.03.04 - Name Forms and controls DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

49. How do you delete an unwanted event-handling method?

ANSWER: When you are working in the Form Designer in the IDE, it is easy to inadvertently double-click a control and automatically create an event-handling method that you do not want. For example, you might double-click a Label named label1 by mistake and generate a method named label1_Click(). (In Visual Studio 2019, the method will start with an uppercase letter.) You can leave the automatically created method empty so that no actions result, but in a professional program you typically would not include empty methods. Such empty methods that never execute are known as orphaned methods. You should not just delete an orphaned method because, behind the scenes, other code might have been created that refers to the method; if so, the program will not compile. Instead of deleting the method code, you should click the control with the unwanted method so it appears in the Properties window, then click the Events button, which looks like a lightning bolt. Select the event you want to eliminate, and delete the name of the method. This eliminates all the references to the method, and your program can again run successfully.

POINTS: 1 REFERENCES: Correcting Errors QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.03.05 - Correct errors DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

50. Compare GUI and console applications. How would you choose which is more appropriate for a given task?

ANSWER: GUI applications look "snazzier." It is easy to add colors and fonts to them, and they contain controls that a user can manipulate with a mouse. Also, users are accustomed to GUI applications from their experiences on the Web. However, GUI programs usually take longer to develop than their console counterparts because you can spend a lot of time setting up the controls, placing them on a Form, and adjusting their sizes and relative positions before you write the code that does the actual work of the program. GUI applications created in the IDE also require much more disk space to store.

Console applications look duller, but they can often be developed more quickly because you do not spend much time setting up objects for a user to manipulate.

When you are learning programming concepts like decision-making and looping, you Copyright Cengage Learning. Powered by Cognero.

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might prefer to keep the interface simple so that you can better concentrate on the new logical constructs being presented.

POINTS: 1 REFERENCES: Deciding Which Interface to Use QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.03.06 - Decide which interface to use DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:49 PM

1. Flowchart creators use diamond shapes to indicate alternative courses of action. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. To represent a decision, flowchart creators use a diamond shape to hold a question, and they draw paths to alternative courses of action emerging from the corners of the diamond.

Incorrect Incorrect. To represent a decision, flowchart creators use a diamond shape to hold a question, and they draw paths to alternative courses of action emerging from the corners of the diamond.

POINTS: 1 REFERENCES: Understanding Logic-Planning Tools and Decision Making QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.01 - Understand logic-planning tools and decision making DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

2. It is illegal to use a block to contain a single statement. a. True b. False ANSWER: FEEDBACK:

False

POINTS:

1

Correct

Correct. It is perfectly legal to block a single statement. Blocking a single statement can be a useful technique to help prevent future errors because when a program later is modified to include multiple statements that depend on the if, the braces serve as a reminder to use a block. Creating a block that contains no statements also is legal in C#.

Incorrect Incorrect. It is perfectly legal to block a single statement. Blocking a single statement can be a useful technique to help prevent future errors because when a program later is modified to include multiple statements that depend on the if, the braces serve as a reminder to use a block. Creating a block that contains no statements also is legal in C#.

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REFERENCES: Making Decisions Using the if Statement QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.02 - Make decisions using if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

3. When if-else statements are nested, each else is always paired with the most recent unpaired if. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. When if-else statements are nested, each else always is paired with the most recent unpaired if.

Incorrect Incorrect. When if-else statements are nested, each else always is paired with

the most recent unpaired if.

POINTS: 1 REFERENCES: Making Decisions Using the if-else Statement QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.03 - Make decisions using if-else statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

4. You can combine as many AND and OR operators in an expression as needed. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. For convenience and clarity you can combine multiple decisions into a single, compound Boolean expression using a combination of conditional AND and OR operators.

Incorrect Incorrect. For convenience and clarity you can combine multiple decisions into a single, compound Boolean expression using a combination of conditional AND and OR operators.

POINTS: 1 REFERENCES: Using Compound Expressions in if Statements QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.04 - Use compound expressions in if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

5. In a switch statement, the keyword return usually terminates each case. a. True b. False Copyright Cengage Learning. Powered by Cognero.

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False Correct. The keyword break usually terminates a switch structure at the end of each case. Although other statements can end a case, break is the most commonly used.

Incorrect Incorrect. The keyword break usually terminates a switch structure at the end of each case. Although other statements can end a case, break is the most commonly used.

Correct

POINTS: 1 REFERENCES: Making Decisions Using the switch Statement QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.05 - Make decisions using switch statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

6. When creating a flowchart or pseudocode representation of a task, what type of structure is one in which one step follows another unconditionally? a. single-decision b. dual-decision c. branched d. sequence ANSWER: FEEDBACK:

d

a. Incorrect. A single decision determines if an action will occur with the use of an if statement. b. Incorrect. A dual decision has two possible resulting actions. c. Incorrect. Branched is not a structure. d. Correct. A sequence structure is a unit of program logic in which one step follows another unconditionally.

POINTS: 1 REFERENCES: Understanding Logic-Planning Tools and Decision Making QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.01 - Understand logic-planning tools and decision making DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

7. What type of structure involves choosing between alternative courses of action based on some value within a program? a. decision b. sequence c. literal d. fixed ANSWER:

a

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a. Correct. A decision structure is a unit of program logic that involves choosing between alternative courses of action based on some value. b. Incorrect. A sequence structure is a unit of program logic in which one step follows another unconditionally. c. Incorrect. Literal is not a type of structure.

d. Incorrect. Fixed is not a type of structure.

POINTS: 1 REFERENCES: Understanding Logic-Planning Tools and Decision Making QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.01 - Understand logic-planning tools and decision making DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

8. What type of statement can be used to make a single-alternative decision? a. switch b. fork c. if d. if-else ANSWER: FEEDBACK:

c

a. Incorrect. The switch structure tests a single variable against a series of exact matches. b. Incorrect. A fork is not a type of statement.

c. Correct. You use an if statement to make a single-alternative decision. In other words, you use an if statement to determine if an action will occur. d. Incorrect. An if-else statement performs a dual-alternative decision.

POINTS: 1 REFERENCES: Making Decisions Using the if Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.02 - Make decisions using if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

9. What should you use if you wish to execute two or more statements conditionally? a. A switch statement. b. A block enclosed within a pair of curly braces. c. A defined sequence structure. d. A declared decision structure.

ANSWER: FEEDBACK:

b

a. Incorrect. A switch structure tests a single variable against a series of exact matches.

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b. Correct. When you want to execute two or more statements conditionally, you place the statements within a block. A block is a collection of one or more statements contained within a pair of curly braces. c. Incorrect. A sequence structure is a unit of program logic in which one step follows another unconditionally. d. Incorrect. A decision structure is a unit of program logic that involves choosing between alternative courses of action based on some value.

POINTS: 1 REFERENCES: Making Decisions Using the if Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.02 - Make decisions using if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

10. The if expression that precedes a block in a decision structure is known as what type of statement? a. sequence b. conditional c. K & R d. control ANSWER: FEEDBACK:

d

a. Incorrect. A sequence is not a statement; it is a structure. A sequence structure is a unit of program logic in which one step follows another unconditionally.

b. Incorrect. The conditional operator is used as an abbreviated version of the ifelse statement. It requires three expressions separated with a question mark and a colon. c. Incorrect. In C#, it is customary to align a block’s opening and closing braces.

Some programmers prefer to place the opening brace on the same line as the if expression instead of giving the brace its own line. This style is called the K & R style. d. Correct. The if expression that precedes the block is the control statement for the decision structure.

POINTS: 1 REFERENCES: Making Decisions Using the if Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.02 - Make decisions using if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

11. In a situation where you want to perform one action when a Boolean expression evaluates as true and an alternate action when it evaluates as false, otherwise known as a dual-alternative decision, what sort of statement should you use? a. if-else b. if Copyright Cengage Learning. Powered by Cognero.

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c. switch d. fork ANSWER: FEEDBACK:

a

a. Correct. Some decisions are dual-alternative decisions. They have two possible resulting actions. If you want to perform one action when a Boolean expression evaluates as true and an alternate action when it evaluates as false, you can use an if-else statement.

b. Incorrect. You use an if statement to make a single-alternative decision. In other words, you use an if statement to determine if an action will occur. c. Incorrect. The switch structure tests a single variable against a series of exact matches. d. Incorrect. A fork is not a type of statement.

POINTS: 1 REFERENCES: Making Decisions Using the if-else Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.03 - Make decisions using if-else statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

12. What conditional operator can be used to create a compound Boolean expression as an alternative to if statements? a. OR b. AND c. XOR d. NOT ANSWER: FEEDBACK:

b

a. Incorrect. You can use the conditional OR operator (or simply the OR operator) when you want some action to occur even if only one of two conditions is true.

b. Correct. As an alternative to nested if statements, you can use the conditional AND operator (or simply the AND operator) to create a compound Boolean expression.

c. Incorrect. XOR is not a conditional operator. d. Incorrect. You use the NOT operator, which is written as an exclamation point ( ! ), to negate the result of any Boolean expression.

POINTS: 1 REFERENCES: Using Compound Expressions in if Statements QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.04 - Use compound expressions in if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

13. What character(s) do you use to make a conditional AND operator within a C# program?

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a. || b. | c. && d. & ANSWER: FEEDBACK:

c

a. Incorrect. The characters || function as the conditional OR operator. b. Incorrect. The character | functions as the logical OR operator. c. Correct. The characters && function as the conditional AND operator. d. Incorrect. The character & functions as the logical AND operator.

POINTS: 1 REFERENCES: Using Compound Expressions in if Statements QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.04 - Use compound expressions in if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

14. What sort of evaluation involves the evaluation of expressions in each part of a compound, conditional Boolean expression only as much as necessary to determine whether the expression is false? a. sequential b. sequence c. smart d. short-circuit ANSWER: FEEDBACK:

d

a. Incorrect. "Sequential" does not describe an evaluation. b. Incorrect. A sequence is not an evaluation; it is a structure. c. Incorrect. "Smart" does not describe an evaluation. d. Correct. Evaluation is the C# feature in which parts of an AND or OR expression are evaluated only as far as necessary to determine if the entire expression is true or false.

POINTS: 1 REFERENCES: Using Compound Expressions in if Statements QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.04 - Use compound expressions in if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

15. What conditional operator can be used when you want some action to occur even if only one of two given conditions is true? a. AND b. OR Copyright Cengage Learning. Powered by Cognero.

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c. XOR d. NOT ANSWER: FEEDBACK:

b

a. Incorrect. As an alternative to nested if statements, you can use the conditional AND operator (or simply the AND operator) to create a compound Boolean expression.

b. Correct. You can use the conditional OR operator (or simply the OR operator) when you want some action to occur even if only one of two conditions is true. c. Incorrect. XOR is not a conditional operator.

d. Incorrect. You use the NOT operator, which is written as an exclamation point ( ! ), to negate the result of any Boolean expression.

POINTS: 1 REFERENCES: Using Compound Expressions in if Statements QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.04 - Use compound expressions in if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

16. What character(s) function as the conditional OR operator in the C# programming language? a. & b. | c. && d. || ANSWER: FEEDBACK:

d

a. Incorrect. The character & functions as the logical AND operator. b. Incorrect. The character | functions as the logical OR operator. c. Incorrect. The characters && function as the conditional AND operator. d. Correct. The characters || function as the conditional OR operator.

POINTS: 1 REFERENCES: Using Compound Expressions in if Statements QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.04 - Use compound expressions in if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

17. What character(s) function as the non-conditional Boolean logical AND operator in the C# programming language? a. && b. | c. & d. || Copyright Cengage Learning. Powered by Cognero.

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c

a. Incorrect. The characters && function as the conditional AND operator. b. Incorrect. The character | functions as the logical OR operator. c. Correct. The character & functions as the logical AND operator. d. Incorrect. The characters || function as the conditional OR operator.

POINTS: 1 REFERENCES: Using Compound Expressions in if Statements QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.04 - Use compound expressions in if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

18. What character(s) function as the non-conditional Boolean logical inclusive OR operator? a. | b. && c. & d. || ANSWER: FEEDBACK:

a

a. Correct. The character | functions as the logical OR operator. b. Incorrect. The characters && function as the conditional AND operator. c. Incorrect. The character & functions as the logical AND operator. d. Incorrect. The characters || function as the conditional OR operator.

POINTS: 1 REFERENCES: Using Compound Expressions in if Statements QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.04 - Use compound expressions in if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

19. When using a switch structure to make decisions within a program, what keyword is used to begin the structure? a. if b. case c. break d. switch ANSWER: FEEDBACK:

d

a. Incorrect. The keyword if is used in decision statements. b. Incorrect. The keyword case is used to identify a course of action in a switch structure.

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c. Incorrect. The keyword break usually terminates a switch structure at the end of each case. d. Correct. The keyword switch starts the structure and is followed immediately by a test expression (called the switch expression) enclosed in parentheses.

POINTS: 1 REFERENCES: Making Decisions Using the switch Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.05 - Make decisions using switch statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

20. In a switch statement, what keyword is followed by one of the possible values that might equal the switch expression? a. case b. default c. break d. switch ANSWER: FEEDBACK:

a

a. Correct. The keyword case is followed by one of the possible values that might equal the switch expression. A colon follows the value. b. Incorrect. The keyword default is used prior to any action that should occur if the test expression does not match any case. c. Incorrect. The keyword break usually terminates a switch structure at the end of each case. d. Incorrect. The keyword switch starts the structure and is followed immediately by a test expression (called the switch expression) enclosed in parentheses.

POINTS: 1 REFERENCES: Making Decisions Using the switch Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.05 - Make decisions using switch statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

21. What keyword can you use to specify an action to take in the event that a test expression does not match any case? a. break b. switch c. default d. else ANSWER:

c

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a. Incorrect. The keyword break usually terminates a switch structure at the

FEEDBACK:

end of each case. b. Incorrect. The keyword switch starts the structure and is followed immediately by a test expression (called the switch expression) enclosed in parentheses.

c. Correct. The keyword default optionally is used prior to any action that should occur if the test expression does not match any case. d. Incorrect. The keyword else is used in an if-else statement. You vertically align the keyword if with the keyword else, and then indent the action statements that depend on the evaluation.

POINTS: 1 REFERENCES: Making Decisions Using the switch Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.05 - Make decisions using switch statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

22. What rule results in an error if you reach the end point of a statement list in a case section? a. no fall through b. en passant c. break on end d. default ANSWER: FEEDBACK:

a

a. Correct. Not allowing code to reach the end of a case is known as the "no fallthrough rule."

b. Incorrect. En passant is a rule used in chess. This rule is not used in computer science. c. Incorrect. Break on end is not a rule.

d. Incorrect. Default is not a rule; default is a keyword that is used prior to any action that should occur if the test expression does not match any case.

POINTS: 1 REFERENCES: Making Decisions Using the switch Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.05 - Make decisions using switch statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

23. What can be used in conjunction with a switch statement in order to make the meaning of case label values much clearer? a. if structure b. OR c. enumeration Copyright Cengage Learning. Powered by Cognero.

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d. conditional AND ANSWER: FEEDBACK:

c

a. Incorrect. An if statement is used to make a single-alternative decision. In other words, you use an if statement to determine if an action will occur. b. Incorrect. You can use the conditional OR operator (or simply the OR operator) when you want some action to occur even if only one of two conditions is true. c. Correct. Using an enumeration with a switch structure can often be convenient. An enumeration allows you to apply values to a list of constants. This makes case label values clearer than their integer equivalents.

d. Incorrect. You can use the conditional AND operator (or simply the AND operator) to create a compound Boolean expression.

POINTS: 1 REFERENCES: Making Decision Using the switch Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.05 - Make decisions using switch statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

24. In C#, what operator is used as an abbreviated version of the if-else statement, and requires three expressions separated with a question mark and a colon? a. switch b. NOT c. conditional d. XOR ANSWER: FEEDBACK:

c

a. Incorrect. The switch statement is an alternative to the series of nested if statements. A switch structure tests a single variable against a series of exact matches.

b. Incorrect. You use the NOT operator, which is written as an exclamation point ( ! ), to negate the result of any Boolean expression.

c. Correct. The conditional operator is used as an abbreviated version of the ifelse statement. It requires three expressions separated with a question mark and a colon.

d. Incorrect. The XOR operator is the logical exclusive OR operator.

POINTS: 1 REFERENCES: Using the Conditional Operator QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.06 - Use the conditional operator DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

25. What kind of conditional operator requires three arguments: a test expression, and true and false result Copyright Cengage Learning. Powered by Cognero.

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expressions? a. binary conditional operator b. ternary conditional operator c. unary conditional operator d. enumeration conditional operator ANSWER: FEEDBACK:

b

a. Incorrect. A binary operator uses two operands. One value is to the left of the operator, and the other value is to the right of the operator. b. Correct. A conditional operator is ternary when it requires three arguments: a test expression and true and false result expressions. c. Incorrect. The unary operator uses one operand.

d. Incorrect. Enumeration is a list of values in which names are substituted for numeric values.

POINTS: 1 REFERENCES: Using the Conditional Operator QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.06 - Use the conditional operator DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

26. What character(s) serve as the NOT operator in the C# programming language? a. & b. && c. <> d. !

ANSWER: FEEDBACK:

d

a. Incorrect. The character & functions as the logical AND operator. b. Incorrect. The characters && function as the conditional AND operator. c. Incorrect. The characters <> do not function as an operator. d. Correct. The character ! functions as the NOT operator.

POINTS: 1 REFERENCES: Using the NOT Operator QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.07 - Use the NOT operator DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

27. What character(s) are used to form the ternary conditional operator in C#? a. ?: b. ?; c. !: Copyright Cengage Learning. Powered by Cognero.

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d. ?

ANSWER: FEEDBACK:

a

a. Correct. The characters ?: function as the ternary conditional operator, which requires three arguments. b. Incorrect. The characters ?; do not function as an operator.

c. Incorrect. The characters !: do not function as an operator. d. Incorrect. The character ? does not function as an operator.

POINTS: 1 REFERENCES: Using the Conditional Operator QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.06 - Use the conditional operator DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

28. When the & and | operators are used between Boolean expressions, they are Boolean logical operators.

What are they when used between integer expressions? a. integral operators b. numerical operators c. bitwise operators d. arithmetic operators ANSWER: FEEDBACK:

c

a. Incorrect. There are no integral operators. b. Incorrect. There are no numerical operators. c. Correct. The & and | operators are Boolean logical operators when they are placed between Boolean expressions. When the same operators are used between integer expressions, they are bitwise operators that are used to manipulate the individual bits of values. d. Incorrect. Arithmetic operators are used to perform arithmetic. They include +, –, *, /, and %.

POINTS: 1 REFERENCES: Using Compound Expressions in if Statements QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.04 - Use compound expressions in if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

29. Placing the opening brace of an if block on the same line as the if statement is known as what style of programming? a. K & R style b. Allman style Copyright Cengage Learning. Powered by Cognero.

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c. GNU style d. Haskell style ANSWER: FEEDBACK:

a

a. Correct. In C#, it is customary to align a block’s opening and closing braces.

Some programmers prefer to place the opening brace on the same line as the if expression instead of giving the brace its own line. This style is called the K & R style. b. Incorrect. Allman style places braces on their own line.

c. Incorrect. GNU style is the placement of broken braces and indented blocks. d. Incorrect. Haskell is a different programming language from C#.

POINTS: 1 REFERENCES: Making Decisions Using the if Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.02 - Make decisions using if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

30. When designing a flowchart for assisting in the coding process, what is a parallelogram typically used to represent? a. They usually represent errors that should occur when provided invalid data. b. They usually represent a declaration of a value. c. They usually represent decision blocks. d. They usually represent input and output statements.

ANSWER: FEEDBACK:

d

a. Incorrect. A parallelogram does not represent an error in a flowchart. b. Incorrect. A parallelogram does not represent the declaration of a value in a flowchart. c. Incorrect. A diamond represents a decision block.

d. Correct. Although you can create a meaningful flowchart using only rectangles, diamonds, and flowlines, parallelograms have traditionally been used to represent input and output statements.

POINTS: 1 REFERENCES: Making Decisions Using the if Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.01 - Understand logic-planning tools and decision making DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

31. Why are all computer decisions true-or-false decisions?

ANSWER: When reduced to their most basic form, all computer decisions are true-or-false decisions. This is because computer circuitry consists of millions of tiny switches that are either "on" or "off," and the result of every decision sets one of these switches in Copyright Cengage Learning. Powered by Cognero.

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memory. The values true and false are Boolean values; every computer decision results in a Boolean value.

POINTS: 1 REFERENCES: Understanding Logic-Planning Tools and Decision Making QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.04.01 - Understand logic-planning tools and decision making DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

32. Explain (in words) how bonuses are assigned in the following example: if(saleAmount > 1000) if(saleAmount < 2000) bonus = 100; else bonus = 50; ANSWER: In this example, the following bonuses are assigned: * If saleAmount is between $1000 and $2000, bonus is $100 because both evaluated expressions are true. * If saleAmount is $2000 or more, bonus is $50 because the first evaluated expression is true and the second one is false. * If saleAmount is $1000 or less, bonus is unassigned because the first evaluated expression is false and there is no corresponding else.

POINTS: 1 REFERENCES: Making Decisions Using the if-else Statement QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.04.03 - Make decisions using if-else statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

33. Describe how short-circuit evaluation works when evaluating compound Boolean expressions. Show an example.

ANSWER: The expressions in each part of a compound Boolean expression are evaluated only as much as necessary to determine whether the entire expression is true or false. This feature is called short-circuit evaluation. With the && operator, both Boolean expressions must be true before the action in the statement can occur. If the first expression is false, the second expression is never evaluated because its value does not matter. For example, if a is not greater than LIMIT in the following if statement, then the evaluation is complete because there is no need to evaluate whether b is greater than LIMIT. if(a > LIMIT && b > LIMIT) WriteLine("Both are greater than LIMIT"); Copyright Cengage Learning. Powered by Cognero.

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POINTS: 1 REFERENCES: Using Compound Expressions in if Statements QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.04.04 - Use compound expressions in if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

34. What is the difference between the conditional AND and OR operators and their logical counterparts? How can incorrect use of the logical operators lead to unintended consequences in your program?

ANSWER: The Boolean logical AND operator (&) and Boolean logical inclusive OR operator (|) work just like their && and || conditional counterparts, except they do not support short-circuit evaluation. That is, they always evaluate both sides of the expression, no matter what the first evaluation is. This can lead to a side effect, or unintended consequence. For example, in the following statement, the first half of the expression is false, so the second half of the Boolean expression is never evaluated and yearsOfService is not increased. if (salesAmountForYear >= 10000 && ++yearsOfService > 10) bonus = 200; On the other hand, when a single & is used and salesAmountForYear is not at least 10,000, then even though the first half of the expression is false, the second half is still evaluated and yearsOfService is increased.

POINTS: 1 REFERENCES: Using Compound Expressions in if Statements QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.04.04 - Use compound expressions in if statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

35. List the four keywords used in a switch structure and provide a brief description of each.

ANSWER: The switch structure uses four keywords: * The keyword switch starts the structure and is followed immediately by a test expression (called the switch expression) enclosed in parentheses. * The keyword case is followed by one of the possible values that might equal the switch expression. A colon follows the value. The entire expression-for example, case 1:-is a case label. A case label identifies a course of action in a switch structure. Most switch structures contain several case labels. * The keyword break usually terminates a switch structure at the end of each case. Although other statements can end a case, break is the most commonly used. * The keyword default optionally is used prior to any action that should occur if the test expression does not match any case.

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POINTS: 1 REFERENCES: Making Decisions Using the switch Statement QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.04.05 - Make decisions using switch statements DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

36. What is the syntax of the conditional operator? Describe how the operator is used.

ANSWER: The conditional operator is used as an abbreviated version of the if-else statement; it requires three expressions separated with a question mark and a colon.

Like the switch structure, you never are required to use the conditional operator.

Rather, it is simply a convenient shortcut, especially when you want to use the result immediately as an expression. The syntax of the conditional operator is: testExpression ? trueResult : falseResult; The first expression, testExpression, is evaluated as true or false. If it is true, then the entire conditional expression takes on the value of the expression following the question mark (trueResult). If the value of the testExpression is false, then the entire expression takes on the value of falseResult.

POINTS: 1 REFERENCES: Using the Conditional Operator QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.04.06 - Use the conditional operator DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

37. What are four of the most frequent errors new programmers make when they first learn to make decisions?

ANSWER: New programmers frequently make errors when they first learn to make decisions.

The most frequent errors include the following: * Using the assignment operator instead of the comparison operator when testing for equality * Inserting a semicolon after the Boolean expression in an if statement instead of after the entire statement is completed * Failing to block a set of statements with curly braces when several statements depend on the if or the else statement * Failing to include a complete Boolean expression on each side of an && or || operator in an if statement POINTS: 1 REFERENCES: Avoiding Common Errors When Making Decisions QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic Copyright Cengage Learning. Powered by Cognero.

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LEARNING OBJECTIVES: MVC#.FARR.18.04.08 - Avoid common errors when making decisions DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

38. The following range-checking code works but is somewhat inefficient. Explain why and show how to revise it to be more efficient. if (saleAmount >= 1000) commissionRate = 0.08; else if (saleAmount >= 500) commissionRate = 0.06; else if (saleAmount <= 499) commissionRate = 0.05; ANSWER: This version of the code works, but it is somewhat inefficient because it executes as follows: When saleAmount is less than $1000 but at least $500, the first Boolean test is false, but the second one is true, so commissionRate is assigned .06 and the if structure ends. The only saleAmount values that reach the third Boolean test are under $500, so the next Boolean test, if (saleAmount <= 499), is always true. When an expression is always true, there is no need to evaluate it. In other words, if saleAmount is not at least $1000 and is also not at least $500, it must by default be less than or equal to $499.

The improved code is: if (saleAmount >= 1000) commissionRate = 0.08; else if (saleAmount >= 500) commissionRate = 0.06; else commissionRate = 0.05; POINTS: 1 REFERENCES: Avoiding Common Errors When Making Decisions QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.04.08 - Avoid common errors when making decisions DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

39. Explain why the following code sample does not capture the intent of the request "Make sure if the sales code is not 'A' or 'B', the customer gets a 10% discount". What is the correct if statement? if(salesCode != 'A' || salesCode != 'B') discount = 0.10; ANSWER: Whenever you use negatives, it is easy to make logical mistakes. The following statement will result in every customer receiving the 10% discount because every salesCode is either not 'A' or not 'B'. For example, a salesCode of 'A' is not 'B'. if(salesCode != 'A' || salesCode != 'B') discount = 0.10; The statement above is always true. The correct statement is one of the following: Copyright Cengage Learning. Powered by Cognero.

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if(salesCode != 'A' && salesCode != 'B') discount = 0.10; if(!(salesCode == 'A' || salesCode == 'B')) discount = 0.10; POINTS: 1 REFERENCES: Avoiding Common Errors When Making Decisions QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.04.08 - Avoid common errors when making decisions DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

40. You write a program in which the user must select whether to receive instructions in English or Spanish. In a console application, you would issue the prompt: Which language do you prefer? Enter 1 for English or 2 for Spanish >> The program would accept the user's entry, make a decision, and take appropriate action. How would you commonly handle this decision-making situation in a GUI application?

ANSWER: In a GUI application, you are more likely to place controls on a Form to get a user's response. For example, you might use two Buttons-one for English and one for Spanish. The user clicks a Button, and an appropriate method executes. No decision is written in the program because a different event is fired from each Button, causing execution of a different Click() method. The interactive environment decides which method is called, so the programmer does not have to code a decision.

POINTS: 1 REFERENCES: Decision-Making Issues in GUI Programs QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.04.09 - Appreciate decision-making issues in GUI programs DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

Match each item with a statement below. a. nested if b. side effect c. switch expression d. case label e. enumeration f. NOT operator g. range check h. conditional operator Copyright Cengage Learning. Powered by Cognero.

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i. truth table j. block REFERENCES: Glossary QUESTION TYPE: Matching HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.04.02 - Make decisions using if statements MVC#.FARR.18.04.04 - Use compound expressions in if statements MVC#.FARR.18.04.05 - Make decisions using switch statements MVC#.FARR.18.04.06 - Use the conditional operator MVC#.FARR.18.04.07 - Use the NOT operator MVC#.FARR.18.04.08 - Avoid common errors when making decisions DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:52 PM

41. A statement in which one decision structure is contained within another.

ANSWER: a POINTS: 1

42. An unintended consequence.

ANSWER: b POINTS: 1

43. A test expression in a switch structure.

ANSWER: c POINTS: 1

44. Identifies a course of action in a switch structure.

ANSWER: d POINTS: 1

45. Allows you to assign values to a list of constants.

ANSWER: e POINTS: 1

46. Negates the result of any Boolean expression.

ANSWER: f POINTS: 1

47. A series of if statements that determine whether a value falls within a specified range.

ANSWER: g POINTS: 1

48. The only ternary operator in C#.

ANSWER: h POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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49. A diagram used to describe the Boolean value of an entire compound expression.

ANSWER: i POINTS: 1

50. A collection of one or more statements contained within a pair of curly braces.

ANSWER: j POINTS: 1

1. A Boolean expression is evaluated within every while loop to determine whether the loop body will execute. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. Within a looping structure, a Boolean expression is evaluated. If it is true, a block of statements called the loop body executes and the Boolean expression is evaluated again.

Incorrect Incorrect. Within a looping structure, a Boolean expression is evaluated. If it is true, a block of statements called the loop body executes and the Boolean expression is evaluated again.

POINTS: 1 REFERENCES: Creating Loops with the while Statement QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.01 - Create loops using the while statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

2. You cannot use a while loop for indefinite loops. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. You can use a while loop for either definite or indefinite loops. To write either type of while loop, you initialize a loop control variable, and as long as its test expression is true, you continue to execute the body of the while loop.

Incorrect Incorrect. You can use a while loop for either definite or indefinite loops. To

write either type of while loop, you initialize a loop control variable, and as long as its test expression is true, you continue to execute the body of the while loop.

POINTS: 1 REFERENCES: Creating Loops with the while Statement QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.01 - Create loops using the while statement DATE CREATED: 5/16/2017 12:56 PM Copyright Cengage Learning. Powered by Cognero.

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3. Statements in a for loop body cannot be blocked. a. True b. False ANSWER: FEEDBACK:

False Correct. Just as with a decision or a while loop, statements in a for loop body can be blocked.

Incorrect Incorrect. Just as with a decision or a while loop, statements in a for loop body can be blocked.

Correct

POINTS: 1 REFERENCES: Creating Loops with the for Statement QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.02 - Create loops using the for statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

4. When loop structures are nested, the inner loop must be entirely contained within the outer loop; loops can never overlap. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. When loops are nested, each pair contains an inner loop and an outer loop. The inner loop must be contained entirely within the outer loop. Loops can never overlap.

Incorrect Incorrect. When loops are nested, each pair contains an inner loop and an outer loop. The inner loop must be contained entirely within the outer loop. Loops can never overlap.

POINTS: 1 REFERENCES: Using Nested Loops QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.04 - Use nested loops DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

5. You can improve loop performance by using prefix incrementing. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. Whether you decide to use a while, for, or do loop in an application, you can improve loop performance by using prefix incrementing rather than postfix incrementing.

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Incorrect Incorrect. Whether you decide to use a while, for, or do loop in an

application, you can improve loop performance by using prefix incrementing rather than postfix incrementing.

POINTS: 1 REFERENCES: Improving Loop Performance QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.06 - Understand how to improve loop performance DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

6. What are the block of statements that are executed in a loop considered to be part of? a. a loop body b. an iteration block c. the loop header d. the loop block ANSWER: FEEDBACK:

a

a. Correct. A loop body is a block of statements executed in a loop. b. Incorrect. One execution of any loop is called an iteration. c. Incorrect. A header is not in a loop. d. Incorrect. A loop block is not the block of statements that are executed in a loop.

POINTS: 1 REFERENCES: Creating Loops with the while Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.01 - Create loops using the while statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

7. What is any single execution of a loop referred to as? a. A lap of the loop. b. An iteration of the loop. c. A path through the loop. d. A round in the loop.

ANSWER: FEEDBACK:

b

a. Incorrect. A lap is not a term that describes a single execution of a loop. b. Correct. One execution of any loop is called an iteration. c. Incorrect. A path is composed of the disk drive in which a file resides plus the complete hierarchy of directories.

d. Incorrect. A round is a term that describes a single execution of a loop.

POINTS: REFERENCES:

1 Creating Loops with the while Statement

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QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.01 - Create loops using the while statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

8. A bug has resulted in your program executing an infinite loop. What key can be pressed in conjunction with the C or Break (Pause) key to escape the loop? a. Esc b. Ctrl c. Shift d. Alt ANSWER: FEEDBACK:

b

a. Incorrect. Pressing Esc and C will not escape the loop. b. Correct. If you ever find yourself in the midst of an infinite loop in a console application, you can break out by holding down the Ctrl key and pressing the C key or the Break (Pause) key. c. Incorrect. Pressing Shift and C will not escape the loop.

d. Incorrect. Pressing Alt and C will not escape the loop.

POINTS: 1 REFERENCES: Creating Loops with the while Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.06 - Understand how to improve loop performance DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

9. Many loop control variable values rely on an added value through each loop. What type of loop control variable is this? a. A comparing loop control variable. b. A reducing loop control variable. c. An expanding loop control variable. d. An incrementing loop control variable.

ANSWER: FEEDBACK:

d

a. Incorrect. There is no comparing loop control variable. b. Incorrect. Reducing or decrementing a variable means subtracting a value from it. c. Incorrect. There is no expanding loop control variable. d. Correct. Many loop control variable values are altered by incrementing, or adding to them.

POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Creating Loops with the while Statement Multiple Choice False

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LEARNING OBJECTIVES: MVC#.FARR.18.05.01 - Create loops using the while statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

10. Loops that are controlled by reducing a variable are utilizing what type of loop control variable? a. incrementing b. comparing c. decrementing d. expanding ANSWER: FEEDBACK:

c

a. Incorrect. Incrementing is the act of increasing the value of a variable, often by 1. b. Incorrect. Comparing is not a loop control variable. c. Correct. Decrementing is the act of decreasing the value of a variable, often by 1. d. Incorrect. Expanding is not a loop control variable.

POINTS: 1 REFERENCES: Creating Loops with the while Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.01 - Create loops using the while statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

11. A loop for which the number of iterations is predetermined is known as what type of loop? a. indefinite b. infinite c. while d. definite ANSWER: FEEDBACK:

d

a. Incorrect. An indefinite loop is a loop in which the number of iterations is not predetermined. b. Incorrect. An infinite loop is a loop that (theoretically) never ends.

c. Incorrect. A while loop executes a body of statements continuously while a test condition continues to be true. d. Correct. In a definite loop, the number of iterations is predetermined.

POINTS: 1 REFERENCES: Creating Loops with the while Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.01 - Create loops using the while statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM Copyright Cengage Learning. Powered by Cognero.

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12. A loop that is controlled by user input rather than altered by arithmetic is known as what type of loop? a. definite b. indefinite c. sentinel d. infinite ANSWER: FEEDBACK:

b

a. Incorrect. A loop for which the number of iterations is predetermined is a definite loop or counted loop. b. Correct. An indefinite loop is one in which the number of iterations is not predetermined. c. Incorrect. A sentinel is not a loop; it is a value that a user must supply to stop a loop. d. Incorrect. An infinite loop is one that (theoretically) never ends.

POINTS: 1 REFERENCES: Creating Loops with the while Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.01 - Create loops using the while statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

13. What type of loop allows you to indicate the starting value for the loop control variable, the test condition that controls loop entry, and the expression that alters the loop control variable, all in one convenient place? a. for b. do c. repeat d. while ANSWER: FEEDBACK:

a

a. Correct. A for loop contains the starting value for the loop control variable, the test condition that controls loop entry, and the expression that alters the loop control variable, all in one statement. b. Incorrect. The do loop (also called a do...while loop) checks the loopcontrolling Boolean expression at the bottom of the loop after one repetition has occurred. c. Incorrect. repeat is not a loop.

d. Incorrect. A while loop executes a body of statements continuously while a test condition continues to be true. It uses the keyword while.

POINTS: 1 REFERENCES: Creating Loops with the for Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.02 - Create loops using the for statement DATE CREATED: 5/16/2017 12:56 PM Copyright Cengage Learning. Powered by Cognero.

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14. What keyword(s) should you use to initiate a for-loop in C#? a. while b. do c. repeat each d. for ANSWER: FEEDBACK:

d

a. Incorrect. while is the keyword used to initiate a while loop. b. Incorrect. do is the keyword used to initiate a do loop. c. Incorrect. repeat each is not a keyword. d. Correct. for is the keyword used to initiate a for loop.

POINTS: 1 REFERENCES: Creating Loops with the for Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.02 - Create loops using the for statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

15. What type of loop checks a Boolean expression at the "top" of the loop before the body has a chance to execute? a. do b. repeat c. switch d. while ANSWER: FEEDBACK:

d

a. Incorrect. The do loop checks a value at the "bottom" of the loop after the first iteration. b. Incorrect. repeat is not a loop.

c. Incorrect. switch is not a loop. d. Correct. The while loop checks a value at the ―top‖ of the loop.

POINTS: 1 REFERENCES: Creating Loops with the do Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.01 - Create loops using the while statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

16. What type of loop checks a Boolean expression at the "bottom" of the loop after each repetition has occurred?

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a. do b. for c. switch d. while ANSWER: FEEDBACK:

a

a. Correct. A do loop checks a value at the "bottom" of the loop after the first iteration. b. Incorrect. A for loop contains the starting value for the loop control variable, the test condition that controls loop entry, and the expression that alters the loop control variable, all in one statement. c. Incorrect. switch is not a loop.

d. Incorrect. The while loop checks a value at the ―top‖ of the loop.

POINTS: 1 REFERENCES: Creating Loops with the do Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.03 - Create loops using the do statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

17. Both the while loop and for loops are considered to be in what category of loops? a. posttest loops b. pretest loops c. intest loops d. for-test loops ANSWER: FEEDBACK:

b

a. Incorrect. A posttest loop is one in which the loop control variable is tested after the loop body executes.

b. Correct. Both the while loop and for loop test the loop control variable before the loop body executes. They are pretest loops. c. Incorrect. An intest loop is not a category of loops.

d. Incorrect. A for-test loop is not a category of loops.

POINTS: 1 REFERENCES: Creating Loops with the do Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.02 - Create loops using the for statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

18. Unlike the while and for loops, the do loop is considered to be in what category of loops? a. intest loops Copyright Cengage Learning. Powered by Cognero.

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b. pretest loops c. posttest loops d. fortest loops ANSWER: FEEDBACK:

c

a. Incorrect. Intest is not a category of loops. b. Incorrect. A pretest loop is a loop in which the loop control variable is tested before the loop body executes.

c. Correct. A do loop tests the loop control variable after the loop body executes, this is a posttest loop.

d. Incorrect. Fortest is not a category of loops.

POINTS: 1 REFERENCES: Creating Loops with the do Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.03 - Create loops using the do statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

19. What type of loop is one in which the loop control variable is tested after the loop body executes? a. posttest b. intest c. fortest d. pretest ANSWER: FEEDBACK:

a

a. Correct. A posttest loop is one in which the loop control variable is tested after the loop body executes. b. Incorrect. Intest is not a type of loop.

c. Incorrect. Fortest is not a type of loop. d. Incorrect. A pretest loop is a loop in which the loop control variable is tested before the loop body executes.

POINTS: 1 REFERENCES: Creating Loops with the do Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.03 - Create loops using the do statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

20. When using nested loops, what loop is contained entirely within an outer loop? a. posttest loop b. pretest loop c. inner loop d. for loop Copyright Cengage Learning. Powered by Cognero.

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c

a. Incorrect. A posttest loop is one in which the loop control variable is tested after the loop body executes. b. Incorrect. A pretest loop is a loop in which the loop control variable is tested before the loop body executes. c. Correct. An inner loop is the loop in a pair of nested loops that is entirely contained within another loop.

d. Incorrect. A for loop contains the starting value for the loop control variable, the test condition that controls loop entry, and the expression that alters the loop control variable, all in one statement.

POINTS: 1 REFERENCES: Using Nested Loops QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.04 - Use nested loops DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

21. When using a nested loop, what should always be thought of as the all-encompassing loop? a. inner loop b. outer loop c. while loop d. for loop ANSWER: FEEDBACK:

b

a. Incorrect. An inner loop is the loop in a pair of nested loops that is entirely contained within another loop. b. Correct. An outer loop is the loop in a pair of nested loops that contains another loop. Thus, when you use a loop within a loop, you should always think of the outer loop as the all-encompassing loop.

c. Incorrect. A while loop executes a body of statements continuously while a test condition continues to be true. It uses the keyword while. d. Incorrect. A for loop contains the starting value for the loop control variable, the test condition that controls loop entry, and the expression that alters the loop control variable, all in one statement.

POINTS: 1 REFERENCES: Using Nested Loops QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.04 - Use nested loops DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

22. Totals that are summed one at a time in a loop are known as what type of totals? a. decremented b. incremented Copyright Cengage Learning. Powered by Cognero.

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c. derived d. accumulated ANSWER: FEEDBACK:

d

a. Incorrect. When you decrement a variable, you subtract a value from it. b. Incorrect. When you increment a variable, you add a value to it. c. Incorrect. Derived is not a type of total. d. Correct. Accumulated totals are computed by adding values one at a time in a loop.

POINTS: 1 REFERENCES: Accumulating Totals QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.05 - Accumulate totals DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

23. What should an accumulator variable be set to before it is used to accumulate a total? a. 1 b. false c. true d. 0 ANSWER: FEEDBACK:

d

a. Incorrect. An accumulator variable should not be set to 1 before it is used to accumulate a total because the total will be off by 1. b. Incorrect. An accumulator variable should not be set to false before it is used to accumulate a total. c. Incorrect. An accumulator variable should not be set to true before it is used to accumulate a total. d. Correct. A variable used to hold a total must be set to 0 before it is used to accumulate a total.

POINTS: 1 REFERENCES: Accumulating Totals QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.05 - Accumulate totals DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

24. The expressions in each part of an AND or OR expression are evaluated only as much as necessary to determine whether the entire expression is true or false. What type of evaluation is this? a. while b. stopwatch c. short-circuit Copyright Cengage Learning. Powered by Cognero.

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d. loop ANSWER: FEEDBACK:

c

a. Incorrect. The keyword while is not an evaluation; it is used to start a type of loop. A while loop executes a body of statements continuously while a test condition continues to be true. b. Incorrect. Stopwatch is not an evaluation; it is a class.

c. Correct. A short-circuit evaluation is a feature in which parts of an AND or OR expression are evaluated only as far as necessary to determine whether the entire expression is true or false. d. Incorrect. A loop is a structure that allows repeated execution of a block of statements.

POINTS: 1 REFERENCES: Improving Loop Performance QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.06 - Understand how to improve loop performance DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

25. What technique can be used to combine two different loops into one? a. pretesting loop b. short-circuiting loop c. loop accumulation d. loop fusion ANSWER: FEEDBACK:

d

a. Incorrect. A pretesting loop is a loop in which the loop control variable is tested before the loop body executes. b. Incorrect. Short-circuiting is a type of evaluation, not a loop. It is the feature in which parts of an AND or OR expression are evaluated only as far as necessary to determine whether the entire expression is true or false. c. Incorrect. Accumulation describes adding values one at a time in a loop to obtain the total. d. Correct. Loop fusion is the technique of combining two loops into one.

POINTS: 1 REFERENCES: Improving Loop Performance QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.06 - Understand how to improve loop performance DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

26. Why do event-driven GUI programs sometimes require fewer coded loops than their counterpart console applications? a. Some events are determined by the user's actions when the program is running.

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b. GUI programs have better loop performance and can benefit more from loop fusion. c. A GUI's properties removes the need for some loops. d. A GUI program can utilize loop nesting, while a console program cannot.

ANSWER: FEEDBACK:

a

a. Correct. Event-driven programs sometimes require fewer coded loops than their counterpart console applications because in these programs some events are determined by the user’s actions when the program is running rather than by the programmer’s coding beforehand. b. Incorrect. Using a loop within a method in a GUI application is no different from using one in a console application. So, the loop performance will be the same in both applications. c. Incorrect. A GUI's properties do not remove the need for some loops.

d. Incorrect. A console program can utilize loop nesting.

POINTS: 1 REFERENCES: Looping Issues in GUI Programs QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.07 - Appreciate looping issues in GUI programs DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

27. A value such as a 'Y' or 'N' that must be supplied in order to stop a loop is known as what type of value? a. control value b. sentinel value c. stop value d. switch value ANSWER: FEEDBACK:

b

a. Incorrect. A control value determines whether loop execution will continue. b. Correct. A sentinel value is one that a user must supply to stop a loop. c. Incorrect. Stop is not a value type. d. Incorrect. A switch is a structure that tests a single variable against a series of exact matches.

POINTS: 1 REFERENCES: Creating Loops with the while Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.06 - Understand how to improve loop performance DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

28. What is a garbage value in the C# programming language? a. It is an unknown, unassigned value. b. It is a variable that is assigned a value that has no purpose.

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c. It is a variable that is used as a placeholder. d. It is a variable that holds output text after it is displayed.

ANSWER: FEEDBACK:

a

a. Correct. An unknown, unassigned value is known as a garbage value. b. Incorrect. A variable that is assigned is not a garbage value. c. Incorrect. A variable that is used as a placeholder is not a garbage value. d. Incorrect. A variable that holds output text after it is displayed is not a garbage value.

POINTS: 1 REFERENCES: Accumulating Totals QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.05 - Accumulate totals DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

29. You are writing a program that defines a variable within a loop, and then tries to use that variable outside the loop. However, the program does not run as intended. What is the issue? a. The variable is being overwritten inside the loop. b. The variable is declared with an incorrect type. c. The variable is limited to the scope of the loop. d. The variable name conflicts with a built in keyword.

ANSWER: FEEDBACK:

c

a. Incorrect. A variable is not overwritten when is it defined within a loop. b. Incorrect. You cannot use a variable outside of the loop if it was defined within the loop. c. Correct. When a loop body ends, any declarations made within it are out of scope, which means they are not usable because they have ceased to exist. d. Incorrect. If a variable name conflicts with a variable name, it cannot be defined.

Also, a variable cannot be used outside of a variable if it is defined within a loop.

POINTS: 1 REFERENCES: Creating Loops with the for Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.02 - Create loops using the for statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/20/2019 9:33 AM

30. After executing your GUI program, you realize that your code has created an infinite loop. How can you break free of the loop in your GUI program? a. Use Ctrl + C b. Use Ctrl + Break c. Close the Frame that hosts the application Copyright Cengage Learning. Powered by Cognero.

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d. Close the IDE ANSWER: FEEDBACK:

c

a. Incorrect. Ctrl + C is used in a console application to break out of an infinite loop. b. Incorrect. Ctrl + Break is used in a console application to break out of an infinite loop.

c. Correct. In a GUI program, you can simply close the Frame that is hosting the application.

d. Incorrect. Closing the IDE will not break out of an infinite loop.

POINTS: 1 REFERENCES: Creating Loops with the while Statement QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.07 - Appreciate looping issues in GUI programs DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

Match each item with a statement below.

Match each item with a statement below: a. infinite loop b. loop control variable c. empty body d. counted loop e. for loop f. outer loop g. garbage h. do loop i. step value j. scope REFERENCES: Glossary QUESTION TYPE: Matching HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.05.01 - Create loops using the while statement MVC#.FARR.18.05.02 - Create loops using the for statement MVC#.FARR.18.05.03 - Create loops using the do statement MVC#.FARR.18.05.04 - Use nested loops MVC#.FARR.18.05.05 - Accumulate totals DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

31. A loop that (theoretically) never ends.

ANSWER: a POINTS: 1

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32. A variable that controls the execution of a while loop.

ANSWER: b POINTS: 1

33. A loop body with no statements in it.

ANSWER: c POINTS: 1

34. Another name for a definite loop.

ANSWER: d POINTS: 1

35. A shorthand structure for programming a definite loop.

ANSWER: e POINTS: 1

36. Contains an inner loop when loops are nested.

ANSWER: f POINTS: 1

37. The value of an uninitialized variable.

ANSWER: g POINTS: 1

38. Checks at the "bottom" of the loop after the first iteration.

ANSWER: h POINTS: 1

39. The amount by which a loop control variable changes on each cycle.

ANSWER: i POINTS: 1

40. The area of a program in which a variable or named constant is known and can be used.

ANSWER: j POINTS: 1

41. When writing a while loop, how can you ensure that it will end correctly?

ANSWER: To make a while loop end correctly, three separate actions should occur: * A variable, the loop control variable, is initialized (before entering the loop). * The loop control variable is tested in the while expression. * The body of the while loop must take some action that alters the value of the loop control variable (so that the while expression eventually evaluates as false).

POINTS: REFERENCES: QUESTION TYPE:

1 Creating Loops with the while Statement Subjective Short Answer

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HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.05.01 - Create loops using the while statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

42. Write a short program that prints Hello on the console four times using a while loop.

ANSWER: using static System.Console; class FourHellos { static void Main() { int number = 1; const int LIMIT = 5; while(number < LIMIT) { WriteLine("Hello"); number = number + 1; } } } POINTS: 1 REFERENCES: Creating Loops with the while Statement QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.05.01 - Create loops using the while statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

43. What are three common ways that the value of a loop control variable is changed during the loop's execution?

ANSWER: Within a correctly functioning loop's body, you can change the value of the loop control variable in a number of ways. Many loop control variable values are altered by incrementing, or adding to them. Other loops are controlled by reducing, or decrementing, a variable and testing whether the value remains greater than some benchmark value. Such a loop, for which the number of iterations is predetermined, is called a definite loop or counted loop. Often, the value of a loop control variable is not altered by arithmetic, but instead is altered by user input. For example, perhaps you want to continue performing some task while the user indicates a desire to continue. In that case, you do not know when you write the program whether the loop will be executed two times, 200 times, or not at all. This type of loop is an indefinite loop.

POINTS: REFERENCES: QUESTION TYPE:

1 Creating Loops with the while Statement Subjective Short Answer

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HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.05.01 - Create loops using the while statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

44. Briefly describe the structure of a for loop.

ANSWER: You begin a for statement with the keyword for followed by a set of parentheses.

Within the parentheses are three sections separated by exactly two semicolons. The three sections are usually used for: * Initializing the loop control variable * Testing the loop control variable * Updating the loop control variable As with an if or a while statement, you can use a single statement as the body of a for loop, or you can use a block of statements enclosed in curly braces.

POINTS: 1 REFERENCES: Creating Loops with the for Statement QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.05.02 - Create loops using the for statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

45. Write two code segments that print the integers 1 through 10. One segment should use a while loop and the other should use a for loop.

ANSWER: // Declare loop control variable and limit int x; const int LIMIT = 10; // Using a while loop to display 1 through 10 x = 1; while(x <= LIMIT) { WriteLine(x); ++x; } // Using a for loop to display 1 through 10 for(x = 1; x <= LIMIT; ++x) WriteLine(x); POINTS: 1 REFERENCES: Creating Loops with the for Statement QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.05.02 - Create loops using the for statement Copyright Cengage Learning. Powered by Cognero.

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46. What tasks can be performed in the three sections of a for loop in addition to initializing a single variable, testing the variable, and incrementing it?

ANSWER: Although the three sections of the for loop are most commonly used for initializing a variable, testing it, and incrementing it, you can also perform other tasks: * You can initialize more than one variable by placing commas between the separate statements, as in the following: for(g = 0, h = 1; g < 6; ++g) * You can declare a new variable, as in the following: for(int k = 0; k < 5; ++k) This technique is used frequently when the variable exists only to control the loop and for no other purpose. When a variable is declared inside a loop, as k is in this example, it can be referenced only for the duration of the loop body; then it is out of scope. * You can perform more than one test by evaluating compound conditions, as in the following: for(g = 0; g < 3 && h > 1; ++g) * You can decrement or perform some other task at the end of the loop's execution, as in: for(g = 5; g >= 1; --g) * You can perform multiple tasks at the end of the loop's execution by separating the actions with commas, as in the following: for(g = 0; g < 5; ++g, ++h) * You can leave one or more portions of the for expression empty, although the two semicolons are still required as placeholders to separate the three sections.

POINTS: 1 REFERENCES: Creating Loops with the for Statement QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.05.02 - Create loops using the for statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

47. Statements in a while loop or for loop body can be blocked. Write a for loop that displays Hello and Goodbye four times each using a blocked loop body.

ANSWER: The following loop displays Hello and Goodbye four times each: const int TIMES = 4; for(int x = 0; x < TIMES; ++x) { WriteLine("Hello"); WriteLine("Goodbye"); } Without the curly braces in this code, Hello would be displayed four times, but Copyright Cengage Learning. Powered by Cognero.

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Goodbye would be displayed only once.

POINTS: 1 REFERENCES: Creating Loops with the for Statement QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.05.02 - Create loops using the for statement DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

48. Why is it important to initialize an accumulator variable?

ANSWER: Assume you have an accumulator variable called total. It is very important that total is initialized to 0. When it is not, the program will not compile. When total is not initialized, it might hold any value. The value could be 0 by chance, but it also could be any other value that happens to be located at the memory address of total.

An unknown value is known as garbage. The C# compiler prevents you from seeing an incorrect total by requiring you to provide a starting value; C# will not use the garbage value that happens to be stored at an uninitialized memory location.

POINTS: 1 REFERENCES: Accumulating Totals QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.05.05 - Accumulate totals DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

49. Suppose a loop should execute while x is less than the sum of two integers, a and b. The loop could be written as: while(x < a + b) // loop body Although this code fragment will run, it is not particularly efficient. In what way is it inefficient, and how could you improve the loop's performance?

ANSWER: You can improve performance by making sure the loop does not include unnecessary operations or statements. If the while loop in the problem executes 1000 times, then the expression a + b is calculated 1000 times. Instead, if you use the following code, the results are the same, but the arithmetic is performed only once: int sum = a + b; while(x < sum) // loop body POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Improving Loop Performance Subjective Short Answer False

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STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.05.06 - Understand how to improve loop performance DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

50. When a loop might execute many times, it becomes increasingly important to consider the number of evaluations that take place. How can considering the order of evaluation of short-circuit operators affect the performance of a loop?

ANSWER: The expressions in each part of an AND or OR expression use short-circuit evaluation; that is, they are evaluated only as much as necessary to determine whether the entire expression is true or false. Suppose that a user can request any number of printed copies of a report from 1 to 15, and you want to validate the user's input before proceeding. If you believe that users are far more likely to enter a value that is too high than to enter a negative value, then you want to start a loop that reprompts the user with the following expression: while(requestedNum > 15 || requestedNum < 1)� Because you believe that the first Boolean expression is more likely to be true than the second one, you can eliminate testing the second one on more occasions. The order of the expressions is not very important in a single loop, but if this loop is nested within another loop, then the difference in the number of tests increases.

POINTS: 1 REFERENCES: Improving Loop Performance QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.05.06 - Understand how to improve loop performance DATE CREATED: 5/16/2017 12:56 PM DATE MODIFIED: 11/15/2019 3:53 PM

1. Arrays are useful when you need to store just one value in memory at a time. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. Arrays allow you to store multiple values in adjacent memory locations and access them by varying a value that indicates which of the stored values to use.

Incorrect Incorrect. Arrays allow you to store multiple values in adjacent memory locations and access them by varying a value that indicates which of the stored values to use.

POINTS: 1 REFERENCES: Using Arrays QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM Copyright Cengage Learning. Powered by Cognero.

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2. In C#, an array's elements are numbered beginning with 1. a. True b. False ANSWER: FEEDBACK:

False Correct Correct. In C#, an array’s elements are numbered beginning with 0.

Incorrect Incorrect. In C#, an array’s elements are numbered beginning with 0.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

3. When you instantiate an array, you can choose its location in memory. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. When you instantiate an array, you cannot choose its location in memory any more than you can choose the location of any other variable.

Incorrect Incorrect. When you instantiate an array, you cannot choose its location in memory any more than you can choose the location of any other variable.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

4. In C#, arrays are objects. a. True b. False ANSWER: FEEDBACK:

True

POINTS: REFERENCES:

1 Declaring an Array and Assigning Values

Correct

Correct. In C#, arrays are objects. When you instantiate an array, you are creating a specific instance of a class that derives from, or builds upon, the built-in class named System.Array.

Incorrect Incorrect. In C#, arrays are objects. When you instantiate an array, you are creating a specific instance of a class that derives from, or builds upon, the built-in class named System.Array.

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QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

5. The power of arrays becomes apparent when you use subscripts that are variables rather than constant values. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. If you treat each array element as an individual entity, declaring an array doesn’t offer much of an advantage over declaring individual variables. The power of arrays becomes apparent when you use subscripts that are variables rather than constant values.

Incorrect Incorrect. If you treat each array element as an individual entity, declaring an array doesn’t offer much of an advantage over declaring individual variables. The power of arrays becomes apparent when you use subscripts that are variables rather than constant values.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

6. What can be used to distinguish each element from the others in an array? a. an element operator b. an object location c. an element ID d. a subscript ANSWER: FEEDBACK:

d

a. Incorrect. The term element operator is not used to distinguish each element from the others in an array. b. Incorrect. An object's location cannot be used to distinguish each element from the others in an array. c. Incorrect. The term element ID is not used to distinguish each element from the others in an array. d. Correct. A subscript (also called an index) is an integer that indicates the position of a particular array element.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements Copyright Cengage Learning. Powered by Cognero.

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7. What operator is used for the purpose of creating objects in C#? a. new b. save c. initialize d. reserve ANSWER: FEEDBACK:

a

a. Correct. The keyword new is also known as the new operator. It is used to create objects. b. Incorrect. save is not an operator.

c. Incorrect. An assignment made when a variable is declared is an initialization. d. Incorrect. reserve is not the keyword to create an object.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

8. In C#, what must an array subscript be? a. a floating decimal value b. a character value c. an integer d. a symbol ANSWER: FEEDBACK:

c

a. Incorrect. An array subscript cannot be a floating decimal number. b. Incorrect. An array subscript cannot be a character. c. Correct. In C#, an array subscript must be an integer. For example, no array contains an element with a subscript of 1.5. A subscript can be an integer constant or variable or an expression that evaluates to an integer. d. Incorrect. An array subscript cannot be a symbol.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

9. An array subscript can be an expression, but only as long as the expression evaluates to what type?

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a. int b. float c. double d. boolean ANSWER: FEEDBACK:

a

a. Correct. A subscript can be an integer constant or variable or an expression that evaluates to an integer. For example, if x and y are integers and their sum is at least 0 but less than the size of an array named array, then it is legal to refer to the element array[x + y].

b. Incorrect. If an expression evaluated to a float, it would not be an array subscript. c. Incorrect. If an expression evaluated to a double, it would not be an array subscript. d. Incorrect. If an expression evaluated to a boolean, it would not be an array subscript.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

10. When you declare an object, what are the character fields set to? a. ' ' b. false c. 0 d. null ANSWER: FEEDBACK:

d

a. Incorrect. The character fields are not set to '' when you declare an object. b. Incorrect. Boolean fields, not character fields, are set to false. c. Incorrect. Numeric fields, not character fields, are set to 0. d. Correct. Character fields are set to '\u0000' or null.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

11. When you declare an object, what are the bool fields initialized to?

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a. null b. false c. true d. '\u0000' ANSWER: FEEDBACK:

b

a. Incorrect. Character fields, not bool fields, are set to null. b. Correct. Fields that are type bool are set to false when you declare an object. c. Incorrect. Fields that are type bool are not set to true when you declare an object. d. Incorrect. Character fields, not bool fields, are set to '\u0000'.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

12. What can you use to assign a list of nondefault values to array elements at declaration? a. value specification b. array specification c. initializer list d. array initializer ANSWER: FEEDBACK:

c

a. Incorrect. Value specification is not the term for the process that assigns a list of non-default values to array elements at declaration. b. Incorrect. Array specification is not the term for the process that assigns a list of non-default values to array elements at declaration. c. Correct. You can assign nondefault values to array elements at declaration by including a comma-separated list of values enclosed within curly braces. The list of values provided for an array is an initializer list.

d. Incorrect. An array initializer cannot assign a list of non-default values to array elements.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

13. When you declare an object, what are the numeric fields initialized to? a. null Copyright Cengage Learning. Powered by Cognero.

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b. '\u0000' c. 0 d. false ANSWER: FEEDBACK:

c

a. Incorrect. Character fields, not numeric fields, are set to null. b. Incorrect. Character fields, not numeric fields, are set to '\u0000'. c. Correct. Numeric fields are set to 0. d. Incorrect. Boolean fields, not numeric fields, are set to false.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

14. Navigation through an entire array using a for or while loop can be done by varying a subscript from 0 to what value? a. Array.Length - 2 b. Array.Length - 1 c. Array.Length d. Array.Length + 1 ANSWER: FEEDBACK:

b

a. Incorrect. You cannot vary a subscript from 0 to Array.Length - 2 when navigating through an entire array because you will lose the last element in the array. b. Correct. You can easily navigate through arrays using a for or while loop that varies a subscript from 0 through Array.Length - 1.

c. Incorrect. You cannot vary a subscript from 0 to Array.Length when navigating through arrays. d. Incorrect. You cannot vary a subscript from 0 to Array.Length + 1 when navigating through arrays.

POINTS: 1 REFERENCES: Accessing Array Elements QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.02 - Access array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

15. What statement, supported by C#, allows you to cycle through every array element without using a subscript? a. for Copyright Cengage Learning. Powered by Cognero.

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b. while c. do-while d. foreach ANSWER: FEEDBACK:

d

a. Incorrect. A for loop can process array elements, but you must use a subscript with each. b. Incorrect. A while loop can process array elements, but you must use a subscript with each. c. Incorrect. A do loop (also called a do...while loop) can process array elements, but you must use a subscript with each. d. Correct. C# supports a foreach statement that you can use to cycle through every array element without using a subscript.

POINTS: 1 REFERENCES: Accessing Array Elements QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.02 - Access array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

16. With the foreach statement, what is used to automatically hold each array value through each iteration of the loop? a. iteration variable b. index holder c. subscript holder d. iteration holder ANSWER: FEEDBACK:

a

a. Correct. With the foreach statement, you provide a temporary iteration variable that automatically holds each array value in turn. b. Incorrect. Index holders are not used in foreach statements.

c. Incorrect. Subscript holders are not used in foreach statements. d. Incorrect. Iteration holders are not used in foreach statements.

POINTS: 1 REFERENCES: Accessing Array Elements QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.02 - Access array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

17. What type of search is performed when each array element is examined in order? a. sequential Copyright Cengage Learning. Powered by Cognero.

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b. parallel c. binary d. range match ANSWER: FEEDBACK:

a

a. Correct. A sequential search is conducted by examining a list in sequence. b. Incorrect. Parallel is not a type of search, as it is a type of array. A parallel array has the same number of elements as another array and corresponding data. c. Incorrect. A binary search is an algorithm that attempts to find an item in a list by splitting the sorted list of objects in half repeatedly as the search gets closer to a match. d. Incorrect. A range match determines the pair of limiting values between which a value falls.

POINTS: 1 REFERENCES: Searching an Array Using a Loop QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.03 - Search an array using a loop DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

18. Given an array that has many possible matches of a search value, what is the most efficient strategy for placement of items? a. The items should be sorted in ascending order. b. The items should be sorted in descending order. c. The items should be randomly sorted. d. The items should be sorted with the most common items first.

ANSWER: FEEDBACK:

d

a. Incorrect. Sorting the items in ascending order is not the most efficient strategy for placement of items. b. Incorrect. Sorting the items in descending order is not the most efficient strategy for placement of items. c. Incorrect. Sorting items randomly will be confusing, and so it is not the most efficient strategy. d. Correct. If you decide to leave a loop as soon as a match is found, the most efficient strategy is to place the most common items first so they are matched sooner.

POINTS: 1 REFERENCES: Searching an Array Using a Loop QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.03 - Search an array using a loop DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

19. What method can be used to find the array position of a requested value in an array by repeatedly splitting Copyright Cengage Learning. Powered by Cognero.

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the list of objects until a match is found, but only if the array is sorted in ascending order? a. Sort() b. BinarySearch() c. Reverse() d. IndexOf() ANSWER: FEEDBACK:

b

a. Incorrect. The Sort() method arranges array items in ascending order. b. Correct. The BinarySearch() method attempts to find an item in a list by splitting the sorted list of objects in half repeatedly as the search gets closer to a match. c. Incorrect. The Reverse() method reverses the order of items in an array.

d. Incorrect. The IndexOf() method finds the first index of a character or substring.

POINTS: 1 REFERENCES: Using the BinarySearch(), Sort(), and Reverse() Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.04 - Use the BinarySearch(), Sort(), and Reverse() methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

20. What C# method should you use in order to arrange an array in ascending order? a. Reverse() b. BinarySearch() c. Order() d. Sort() ANSWER: FEEDBACK:

d

a. Incorrect. The Reverse() method reverses the order of items in an array. b. Incorrect. The BinarySearch() method attempts to find an item in a list by splitting the sorted list of objects in half repeatedly as the search gets closer to a match. c. Incorrect. Order() is not a built-in C# method.

d. Correct. The Sort() method arranges array items in ascending order.

POINTS: 1 REFERENCES: Using the BinarySearch(), Sort(), and Reverse() Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.04 - Use the BinarySearch(), Sort(), and Reverse() methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

21. In order to use the Sort() method, what must the array name be passed to?

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a. List.Sort() b. Collections.Sort() c. Array.Sort() d. Sort.Sort() ANSWER: FEEDBACK:

c

a. Incorrect. List.Sort() is not a built-in C# method. b. Incorrect. Collections.Sort() is not a built-in C# method. c. Correct. To use the method, you pass the array name to Array.Sort(), and the element positions within the array are rearranged appropriately. d. Incorrect. Sort.Sort() is not a built-in C# method.

POINTS: 1 REFERENCES: Using the BinarySearch(), Sort(), and Reverse() Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.04 - Use the BinarySearch(), Sort(), and Reverse() methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

22. What method does not sort array elements, but rather rearranges their positions to the opposite order? a. BinarySearch() b. Opposite() c. Reverse() d. Order() ANSWER: FEEDBACK:

c

a. Incorrect. The BinarySearch() method attempts to find an item in a list by splitting the sorted list of objects in half repeatedly as the search gets closer to a match. b. Incorrect. Opposite() is not a built-in C# method.

c. Correct. The Reverse() method reverses the order of items in an array. d. Incorrect. Order() is not a built-in C# method.

POINTS: 1 REFERENCES: Using the BinarySearch(), Sort(), and Reverse() Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.04 - Use the BinarySearch(), Sort(), and Reverse() methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

23. What type of array utilizes the same number of columns in each row? a. vector b. rectangular c. list Copyright Cengage Learning. Powered by Cognero.

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d. linear ANSWER: FEEDBACK:

b

a. Incorrect. A vector is not an array. b. Correct. In a rectangular array, each row has the same number of columns. c. Incorrect. An array is a list of data. d. Incorrect. A linear array is a list of numbers.

POINTS: 1 REFERENCES: Using Multidimensional Arrays QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.05 - Use multidimensional arrays DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

24. An array that you can picture as a column of values, and whose elements you can access using a single subscript, is what type of array? a. two-dimensional b. jagged c. rectangular d. single-dimensional ANSWER: FEEDBACK:

d

a. Incorrect. Two-dimensional arrays have two or more columns of values for each row. You must use two subscripts when you access an element in a twodimensional array. b. Incorrect. A jagged array is a one-dimensional array in which each element is another array. c. Incorrect. A rectangular array is an array in which each row has the same number of columns. d. Correct. An array that you can picture as a column of values, and whose elements you can access using a single subscript, is a one-dimensional or singledimensional array.

POINTS: 1 REFERENCES: Using Multidimensional Arrays QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.05 - Use multidimensional arrays DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

25. What type of one-dimensional array contains another one-dimensional array in each element, with each array capable of being a different length? a. rectangular b. matrix c. jagged Copyright Cengage Learning. Powered by Cognero.

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d. table ANSWER: FEEDBACK:

c

a. Incorrect. A rectangular array is a two-dimensional array in which each row has the same number of columns. b. Incorrect. A matrix is a two-dimensional array, not a one-dimensional array.

c. Correct. A jagged array is a one-dimensional array in which each element is another array. d. Incorrect. A table is a two-dimensional array, not a one-dimensional array.

POINTS: 1 REFERENCES: Using Multidimensional Arrays QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.05 - Use multidimensional arrays DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

26. When using an array in a GUI program, if array values will change based on user input, where must the array be stored? a. It must be stored inside the method that processes the user's events. b. It must be stored inside an event handler. c. It must be stored outside the method that processes the user's events. d. It must be stored outside of the main program.

ANSWER: FEEDBACK:

c

a. Incorrect. The array should not be stored inside the method that processes the user's events. b. Incorrect. The array should not be stored inside an event handler.

c. Correct. The major unusual consideration when using an array in a GUI program is that if the array values change based on user input, the array must be stored outside any method that reacts to the user’s event. d. Incorrect. The array should not be stored outside the main program.

POINTS: 1 REFERENCES: Array Issues in GUI Programs QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.06 - Appreciate array issues in GUI programs DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

27. What will be the highest subscript value possible for an array with 15 elements? a. 14 b. 15 c. 16 d. 17 Copyright Cengage Learning. Powered by Cognero.

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a

a. Correct. In C#, an array’s elements are numbered beginning with 0, so if an array has 15 elements, you can use any subscript from 0 through 14. b. Incorrect. In C#, an array's elements are not numbered beginning at 1.

c. Incorrect. In C#, an array's elements are not numbered beginning at 2. d. Incorrect. In C#, an array's elements are not numbered beginning at 3.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

28. When an array is initialized with the double keyword, how large is each element of the array? a. 1 byte b. 8 bytes c. 8 bits d. 8 megabytes ANSWER: FEEDBACK:

b

a. Incorrect. 1 byte is too small. b. Correct. A double takes 8 bytes of storage, and each element of a double array is stored in succession at an address that is 8 bytes higher than the previous one.

c. Incorrect. 8 bits is too small. d. Incorrect. 8 megabytes is too large.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

29. What type of array has the same number of elements and corresponding data with another array? a. twin array b. shadow array c. parallel array d. shared array ANSWER: FEEDBACK:

c

a. Incorrect. There is no array called twin array. b. Incorrect. There is no array called shadow array.

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c. Correct. A parallel array has the same number of elements as another array and corresponding data. d. Incorrect. There is no array called shared array.

POINTS: 1 REFERENCES: Searching an Array Using a Loop QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.03 - Search an array using a loop DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

30. How can the Array methods such as BinarySearch() and Sort() be used without constantly referencing the Array class name? a. Issue a using static System.Array(); statement. b. Add include Array.*; to the beginning of your program. c. Issue a using class Array; statement. d. Place a copy of the System.dll file in your project.

ANSWER: FEEDBACK:

a

a. Correct. Including the statement using static System.Array(); allows you to use the BinarySearch() method and the Sort() method without using the Array class name and the dot. b. Incorrect. include Array.*; is not a usable statement. c. Incorrect. The statement using class Array will not allow you to use the array methods without constantly referencing the Array class name. d. Incorrect. Placing a copy of the System.dll file in your project will not allow you to use the Array methods without constantly referencing the Array class name.

POINTS: 1 REFERENCES: Using the BinarySearch(), Sort(), and Reverse() Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.04 - Use the BinarySearch(), Sort(), and Reverse() methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

Match each item with a statement below. a. array b. array element c. subscript d. jagged array e. read-only f. range match g. Reverse() method Copyright Cengage Learning. Powered by Cognero.

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h. multidimensional array i. matrix j. initializer list REFERENCES: Glossary QUESTION TYPE: Matching HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements MVC#.FARR.18.06.02 - Access array elements MVC#.FARR.18.06.03 - Search an array using a loop MVC#.FARR.18.06.04 - Use the BinarySearch(), Sort(), and Reverse() methods MVC#.FARR.18.06.05 - Use multidimensional arrays DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

31. A list of data items that all have the same data type and the same name but are distinguished from each other by a subscript or index.

ANSWER: a POINTS: 1

32. An individual object within an array.

ANSWER: b POINTS: 1

33. An integer contained within square brackets that indicates the position of one of an array's elements.

ANSWER: c POINTS: 1

34. A one-dimensional array in which each element is another array.

ANSWER: d POINTS: 1

35. Describes a value that can be accessed but not altered.

ANSWER: e POINTS: 1

36. Determines the pair of limiting values between which a value falls.

ANSWER: f POINTS: 1

37. Reverses the order of items in an array.

ANSWER: g POINTS: 1

38. Requires multiple subscripts to access the array elements.

ANSWER: h POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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39. A term used by mathematicians to refer to a two-dimensional array.

ANSWER: i POINTS: 1

40. The list of values provided for an array.

ANSWER: j POINTS: 1

41. How can you change the size of an array in C#?

ANSWER: You can change the size of an array associated with an identifier, if necessary. For example, if you declare int[] array;, you can assign five elements later with array = new int[5];. Later in the program, you might alter the array size to 100 with array = new int[100];. Still later, you could alter it again to be either larger or smaller. This feature is not allowed in most other programming languages. If you resize an array in this manner, the same identifier refers to a new array in memory and all the values are set to 0.

POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

42. Explain how to assign a value to a specific array element and how to print it.

ANSWER: When you work with any individual array element, you treat it no differently than you treat a single variable of the same type. For example, to assign a value to the first sales in an array, you use a simple assignment statement, such as the following: sales[0] = 2100.00; To print the last sales in a 20-element array, you write: WriteLine(sales[19]); POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

43. How can you assign nondefault values to array elements when the array is declared? Give an example.

ANSWER: You can assign nondefault values to array elements at declaration by including a comma-separated list of values enclosed within curly braces. For example, if you Copyright Cengage Learning. Powered by Cognero.

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want to create an array named myScores and store five test scores within the array, you can use any of the following declarations: int[] myScores = new int[5] {100, 76, 88, 100, 90}; int[] myScores = new int[] {100, 76, 88, 100, 90}; int[] myScores = {100, 76, 88, 100, 90}; POINTS: 1 REFERENCES: Declaring an Array and Assigning Values QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.06.01 - Declare an array and assign values to array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

44. Explain how to use a for loop to perform an arithmetic operation on each element in an array.

ANSWER: You can use a for loop to perform arithmetic on each element in an array. For example: for(int subscript = 0; subscript < 5; ++subscript) myScores[subscript] += 3; The variable subscript is declared and initialized to 0, then compared to the length of the array (in this case, 5). Because it is less than 5, the loop executes and myScores[0] increases by 3. The variable subscript is incremented and becomes 1, which is still less than 5. So when the loop executes again, myScores[1] increases by 3, and so on.

POINTS: 1 REFERENCES: Accessing Array Elements QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.06.02 - Access array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

45. Describe the circumstances where you can use the foreach statement.

ANSWER: The foreach statement is used only under certain circumstances: * You typically use foreach only when you want to access every array element. To access only selected array elements, you must manipulate subscripts using some other technique-for example, using a for loop or a while loop. * The foreach iteration variable is read-only-that is, you cannot assign a value to it. If you want to assign a value to array elements, you must use a different type of loop.

POINTS: REFERENCES: QUESTION TYPE:

1 Accessing Array Elements Subjective Short Answer

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HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.06.02 - Access array elements DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

46. Explain how to use a for loop to search an array for an exact match.

ANSWER: One way to determine whether a given value equals a value in an array is to use a for statement to loop through an array and set a Boolean variable to true when a match is found.

For example, initialize the array valid values and a Boolean variable, isValidItem, using the following statements: int[] validValues = {101, 108, 201, 213, 266, 304, 311, 409, 411, 412}; bool isValidItem = false; Next, you can use a for statement to loop through the array and set the Boolean variable to true when a match is found: for(int x = 0; x < validValues.Length; ++x) if(itemOrdered == validValues[x]) isValidItem = true; POINTS: 1 REFERENCES: Searching an Array Using a Loop QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.06.03 - Search an array using a loop DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

47. Under what circumstances does the BinarySearch() method prove inadequate?

ANSWER: Under the following conditions, the BinarySearch() method proves inadequate: * If your array items are not arranged in ascending order, the BinarySearch() method does not work correctly. * If your array holds duplicate values and you want to find all of them, the BinarySearch() method doesn't work-it can return only one value, so it returns the position of the first matching value it finds. This matching position is the one closest to the middle of the array. * If you want to find a range match rather than an exact match, the BinarySearch() method does not work.

POINTS: 1 REFERENCES: Using the BinarySearch(), Sort(), and Reverse() Methods QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic Copyright Cengage Learning. Powered by Cognero.

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48. Write a small program that uses the Sort() method to sort an array of names into alphabetical order.

ANSWER: using System; class SortArray { static void Main() { string[] names = {"Olive", "Patty", "Richard", "Ned", "Mindy"}; int x; Array.Sort(names); for(x = 0; x < names.Length; ++x) WriteLine(names[x]); } } POINTS: 1 REFERENCES: Using the BinarySearch(), Sort(), and Reverse() Methods QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.06.04 - Use the BinarySearch(), Sort(), and Reverse() methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

49. Briefly describe the Reverse() method.

ANSWER: The Reverse() method reverses the order of items in an array. In other words, for any array, the element that starts in position 0 is relocated to position Length - 1, the element that starts in position 1 is relocated to position Length - 2, and so on until the element that starts in position Length - 1 is relocated to position 0. You call the Reverse() method the same way you call the Sort() method-you simply pass the array name to the method.

POINTS: 1 REFERENCES: Using the BinarySearch(), Sort(), and Reverse() Methods QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.06.04 - Use the BinarySearch(), Sort(), and Reverse() methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

50. Describe the main characteristics of two-dimensional arrays. How do you access an element in a twodimensional array? What are some synonyms for a two-dimensional array?

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C# supports multidimensional arrays-those that require multiple subscripts to access the array elements. The most commonly used multidimensional arrays are twodimensional arrays that are rectangular. Two-dimensional arrays have two or more columns of values for each row. In a rectangular array, each row has the same number of columns. You must use two subscripts when you access an element in a two-dimensional array. When mathematicians use a two-dimensional array, they often call it a matrix or a table; you might have used a two-dimensional array called a spreadsheet.

POINTS: 1 REFERENCES: Using Multidimensional Arrays QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.06.05 - Use multidimensional arrays DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:55 PM

1. If you do not provide an accessibility modifier for a method, it is private by default. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. If you do not provide an accessibility modifier for a method, it is private by default. The Main() method headers that you have seen in all of the examples in this book have no access modifier, so they are private.

Incorrect Incorrect. If you do not provide an accessibility modifier for a method, it is private by default. The Main() method headers that you have seen in all of the examples in this book have no access modifier, so they are private.

POINTS: 1 REFERENCES: Writing Methods with No Parameters and No Return Value QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.02 - Write methods with no parameters and no return value DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

2. A declaration for a method that receives two or more arguments must list the type for each parameter separately only if the parameters have different types. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. A declaration for a method that receives two or more arguments must list the type for each parameter separately, even if the parameters have the same type.

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Incorrect Incorrect. A declaration for a method that receives two or more arguments must list the type for each parameter separately, even if the parameters have the same type.

POINTS: 1 REFERENCES: Writing Methods that Require Multiple Arguments QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.04 - Write methods that require multiple arguments DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

3. The type of an argument in a method call must exactly match the type of the corresponding parameter specified in the method declaration. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. The type of an argument does not need to match the parameter list exactly if the argument can be promoted to the parameter type. For example, an int argument can be passed to a double parameter.

Incorrect Incorrect. The type of an argument does not need to match the parameter list exactly if the argument can be promoted to the parameter type. For example, an int argument can be passed to a double parameter.

POINTS: 1 REFERENCES: Writing Methods That Return a Value QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.04 - Write methods that require multiple arguments DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

4. A method can return, at most, one value to a method that calls it. a. True b. False ANSWER: FEEDBACK:

True

POINTS:

1

Correct

Correct. A method can return, at most, one value to a method that calls it. The return type for a method can be any type used in the C# programming language, which includes the basic built-in types int, double, char, and so on. You can also use a class type as the return type for a method, including any type built into the C# language.

Incorrect Incorrect. A method can return, at most, one value to a method that calls it. The return type for a method can be any type used in the C# programming language, which includes the basic built-in types int, double, char, and so on. You can also use a class type as the return type for a method, including any type built into the C# language.

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REFERENCES: Writing Methods That Return a Value QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.05 - Write methods that return a value DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

5. Arrays, like all objects, are passed by value. a. True b. False ANSWER: FEEDBACK:

False Correct. Arrays, like all objects but unlike built-in types such as double and int, are passed by reference.

Incorrect Incorrect. Arrays, like all objects but unlike built-in types such as double and int, are passed by reference.

Correct

POINTS: 1 REFERENCES: Passing Array Values to a Method QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.06 - Pass array values to a method DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

6. The process of calling a method's name and using the method to perform a job for a class is also known by what term? a. instantiating the method b. overloading the method c. inheriting the method d. invoking the method ANSWER: FEEDBACK:

d

a. Incorrect. To instantiate means to create an object. b. Incorrect. Overloading involves the ability to write multiple versions of a method using the same method name. c. Incorrect. Inheritance is the principle that you can apply your knowledge of a general category to more specific objects. d. Correct. Frequently, the methods you have written have invoked, or called, other methods. That is, your program used a method’s name and the method executed to perform a task for the class.

POINTS: 1 REFERENCES: Understanding Methods and Implementation Hiding QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.01 - Understand methods and implementation hiding DATE CREATED: 5/16/2017 12:57 PM Copyright Cengage Learning. Powered by Cognero.

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7. What technique allows a programmer to change the way in which a method works internally without affecting programs that utilize the method? a. overloading b. implementation hiding c. polymorphism d. inheritance ANSWER: FEEDBACK:

b

a. Incorrect. Overloading involves the ability to write multiple versions of a method using the same method name. b. Correct. Implementation hiding is the technique of keeping the details of a method's operations hidden. c. Incorrect. Polymorphism is the ability to create methods that act appropriately depending on the context. d. Incorrect. Inheritance is the principle that you can apply your knowledge of a general category to more specific objects.

POINTS: 1 REFERENCES: Understanding Methods and Implementation Hiding QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.01 - Understand methods and implementation hiding DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

8. What term is used to describe any device you can use without knowing how it works internally? a. white box b. interface c. black box d. method ANSWER: FEEDBACK:

c

a. Incorrect. A white box does not describe any device that can be used without knowing how it works internally. b. Incorrect. An interface is a data type, like a class, except it is a collection of empty, abstract methods (and perhaps other members) that can be used by any class as long as the class provides definitions to override the interface's donothing method definitions. c. Correct. A black box is any device you can use without knowing how it works internally. d. Incorrect. A method is an encapsulated series of statements that carry out a task.

POINTS: 1 REFERENCES: Understanding Methods and Implementation Hiding QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.01 - Understand methods and implementation hiding Copyright Cengage Learning. Powered by Cognero.

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9. What is a method that uses another method considered to be? a. a method peer b. a server method c. a method pair d. a client of the other method ANSWER: FEEDBACK:

d

a. Incorrect. There are no methods known as a method peer. b. Incorrect. There are no methods known as a server method. c. Incorrect. There are no methods known as a method pair. d. Correct. A client is a method that uses another method.

POINTS: 1 REFERENCES: Understanding Methods and Implementation Hiding QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.01 - Understand methods and implementation hiding DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

10. To more easily incorporate methods into a program, it is common practice to store methods in their own classes and files. Then you can add them into any application that uses them. What is the resulting compound program called? a. a compound interface b. a multifile assembly c. a hid assembly d. a hid implementation ANSWER: FEEDBACK:

b

a. Incorrect. The compound interface does not store methods in their own classes and files. b. Correct. To more easily incorporate methods into a program, it is common practice to store methods (or groups of associated methods) in their own classes and files. Then you can add the methods into any application that uses them. The resulting compound program is called a multifile assembly. c. Incorrect. A hid assembly does not store methods in their own classes and files.

d. Incorrect. A hid implementation does not store methods in their own classes and files.

POINTS: 1 REFERENCES: Understanding Methods and Implementation Hiding QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.01 - Understand methods and implementation hiding Copyright Cengage Learning. Powered by Cognero.

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11. What optionally declared method modifier can set limits as to how other methods are able to use the method? a. protection b. qualifier c. accessibility d. type ANSWER: FEEDBACK:

c

a. Incorrect. Protection is not a method modifier. b. Incorrect. Qualifier is not a method modifier. c. Correct. The optional declared accessibility for a method sets limits as to how other methods can use your method d. Incorrect. Type is not a method modifier.

POINTS: 1 REFERENCES: Writing Methods with No Parameters and No Return Value QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.02 - Write methods with no parameters and no return value DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

12. What accessibility modifier allows access to a method from other classes? a. public b. protected c. private d. protected internal ANSWER: FEEDBACK:

a

a. Correct. Public access is established by including a public modifier in the member declaration. This modifier allows access to the method from other classes. b. Incorrect. The protected class access modifier means access to the class is limited to the class and to any classes derived from the class. c. Incorrect. Private access is established by including a private modifier in the member declaration or by omitting any accessibility modifier. This modifier limits method access to the class that contains the method. d. Incorrect. protected internal is not an accessibility modifier.

POINTS: 1 REFERENCES: Writing Methods with No Parameters and No Return Value QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.02 - Write methods with no parameters and no return value Copyright Cengage Learning. Powered by Cognero.

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13. What accessibility modifier limits method access to the class that contains the method? a. protected b. private c. protected internal d. internal ANSWER: FEEDBACK:

b

a. Incorrect. The protected class access modifier means access to the class is limited to the class and to any classes derived from the class. b. Correct. Private access is established by including a private modifier in the member declaration or by omitting any accessibility modifier. This modifier limits method access to the class that contains the method. c. Incorrect. protected internal is not an accessibility modifier.

d. Incorrect. The internal class access modifier means access is limited to the assembly to which the class belongs.

POINTS: 1 REFERENCES: Writing Methods with No Parameters and No Return Value QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.02 - Write methods with no parameters and no return value DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

14. What keyword modifier indicates that a method can be called by referring to the class rather than an object from the class? a. static b. internal c. protected d. nonstatic ANSWER: FEEDBACK:

a

a. Correct. If you use the keyword modifier "static," you indicate that a method can be called without referring to an object. Instead, you refer only to the class. b. Incorrect. The internal class access modifier means access is limited to the assembly to which the class belongs. c. Incorrect. The keyword protected, provides intermediate level of security between public and private access. d. Incorrect. A nonstatic method call requires an object reference, but there is no keyword nonstatic.

POINTS: REFERENCES: QUESTION TYPE:

1 Writing Methods with No Parameters and No Return Value Multiple Choice

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15. What is the name for a variable that holds data passed to a method when it is called? a. element b. parameter c. literal d. declaration ANSWER: FEEDBACK:

b

a. Incorrect. Element is not the name for a variable that holds data passed to a method when it is called.

b. Correct. A parameter to a method is a variable that holds data passed to a method when it is called.

c. Incorrect. Literal is not the name for a variable that holds data passed to a method when it is called.

d. Incorrect. A method declaration is a method header or definition. It precedes a method and includes a return type, identifier, and an optional parameter.

POINTS: 1 REFERENCES: Writing Methods with No Parameters and No Return Value QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.02 - Write methods with no parameters and no return value DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

16. Variables and constants that are declared within a method are only available until the end of the method.

Why is this? a. The method's variables exist within a scope, and are only visible within the method. b. The variables utilize defined locality. c. The variables are not configured for accessibility. d. Variables do not support nesting in C#.

ANSWER: FEEDBACK:

a

a. Correct. Variables and constants that are declared within a method are in scope only from the point at which they are declared to the end of the method. b. Incorrect. The locality of a variable is not why the variables and constants are only available at the end of a method. c. Incorrect. The variables are accessible at the end of the method.

d. Incorrect. Nesting refers to placing structures within other structures; it is not a concept related to support.

POINTS: REFERENCES: QUESTION TYPE:

1 Writing Methods with No Parameters and No Return Value Multiple Choice

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17. A parameter within a method header that accepts a value is considered to be what type of parameter? a. formal parameter b. local parameter c. global parameter d. actual parameter ANSWER: FEEDBACK:

a

a. Correct. A formal parameter is a parameter within a method header that accepts a value.

b. Incorrect. A local variable is one known within a method or block, but local is not an adjective commonly used to describe a parameter. c. Incorrect. A global variable is one that is known to an entire program, but global is not an adjective commonly used to describe a parameter.

d. Incorrect. Actual parameters are arguments within a method call.

POINTS: 1 REFERENCES: Writing Methods That Require a Single Argument QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.03 - Write methods that require a single argument DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

18. A formal parameter that receives a copy of the value passed to it is an example of what type of parameter? a. reference b. output c. input d. value ANSWER: FEEDBACK:

d

a. Incorrect. A reference parameter in a method header receives the parameter's address. A variable sent to a reference parameter is required to have been assigned a value before it is used in the method call. b. Incorrect. An output parameter in a method header receives the parameter's address. A variable sent to an output parameter is not required to have been assigned a value before it is used in the method call. c. Incorrect. Input is not a type of parameter.

d. Correct. A value parameter is a parameter that receives a copy of the value passed to it.

POINTS: REFERENCES: QUESTION TYPE:

1 Writing Methods That Require a Single Argument Multiple Choice

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19. When can a method be called with fewer arguments than exist in the parameter list for the method? a. Only when default arguments are defined for the method. b. Only when value parameters are passed by other parts of the program. c. Only when scope relaxation is used to allow global variables. d. Only when the parameters are marked as non-critical parameters.

ANSWER: FEEDBACK:

a

a. Correct. The number of arguments does not need to match the number in the parameter list when you use default arguments. b. Incorrect. When value parameters are passed by other parts of the program, a method cannot be called with fewer arguments than exist in the parameter list for the method.

c. Incorrect. Scope relaxation is not a term that is related to parameters. d. Incorrect. Non-critical is not a term that is related to parameters.

POINTS: 1 REFERENCES: Writing Methods That Require Multiple Arguments QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.04 - Write methods that require multiple arguments DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/20/2019 9:53 AM

20. What is the return type of the ReadLine() method call? a. int b. Object c. bool d. string ANSWER: FEEDBACK:

d

a. Incorrect. The return type of ReadLine() is not int. b. Incorrect. The return type of ReadLine() is not Object. c. Incorrect. The return type of ReadLine() is not bool. d. Correct. Because the ReadLine() method call can be assigned to a string, its return type is string.

POINTS: 1 REFERENCES: Writing Methods That Return a Value QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.05 - Write methods that return a value DATE CREATED: 5/16/2017 12:57 PM Copyright Cengage Learning. Powered by Cognero.

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21. What statement is used to cause a value to be sent back to the calling method? a. break b. result c. return d. continue ANSWER: FEEDBACK:

c

a. Incorrect. The break statement terminates a block but does not send a value. b. Incorrect. In C#, result is not a valid statement. c. Correct. A return statement causes a value to be sent back from a method to its calling method. d. Incorrect. The continue statement passes control to the next iteration of a loop.

POINTS: 1 REFERENCES: Writing Methods That Return a Value QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.05 - Write methods that return a value DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

22. What is the term used to describe the calling of a method from within another method? a. nested method calling b. interleaved method calling c. method cascading d. method children ANSWER: FEEDBACK:

a

a. Correct. When method calls are placed inside other method calls, the calls are nested method calls.

b. Incorrect. Interleaved is not used to describe the calling method from within another method. c. Incorrect. Cascading is not used to describe the calling method from within another method. d. Incorrect. Children is not used to describe the calling method from within another method.

POINTS: 1 REFERENCES: Writing Methods That Return a Value QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.05 - Write methods that return a value DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM Copyright Cengage Learning. Powered by Cognero.

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23. Under what circumstances will a method receive the actual memory address of a passed array, and be able to alter values in the original array? a. Only when it is passed by reference. b. Only when it is passed by value. c. Only when the array is inherited. d. Only when the array is within the method's scope.

ANSWER: FEEDBACK:

a

a. Correct. Passed by reference describes the state of an argument passed to a method when the method receives its memory address. b. Incorrect. Passed by value describes the state of an argument passed to a method when the method receives a copy of the argument.

c. Incorrect. Inheritance is the ability to extend a class so as to create a more specific class that contains all the attributes and methods of a more general class. The extended class usually contains new attributes or methods as well.

d. Incorrect. An array declared within a method is in scope in that method; changes made to it have no effect on an array declared in the calling method.

POINTS: 1 REFERENCES: Passing Array Values to a Method QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.06 - Pass array values to a method DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

24. What characters are placed after the data type in a method's parameter list to indicate that a method parameter is an array? a. () b. <> c. [] d. {} ANSWER: FEEDBACK:

c

a. Incorrect. Placing parenthesis after the data type in a method's parameter list does not indicate that the method parameter is an array.

b. Incorrect. Placing <> after the data type in a method's parameter list does not indicate that the method parameter is an array.

c. Correct. You indicate that a method parameter must be an array by placing

square brackets after the data type in the method’s parameter list. d. Incorrect. Placing braces after the data type in a method's parameter list does not indicate that the method parameter is an array.

POINTS: 1 REFERENCES: Passing Array Values to a Method QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.06 - Pass array values to a method Copyright Cengage Learning. Powered by Cognero.

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25. When you place a button named okButton on a Form in the IDE and double-click it, what method header is generated automatically? (Note that if you are using Visual Studio 2019, each method name will start with an uppercase letter.) a. public void okButton_Click(object sender, EventArgs e) b. private void okButton_Click(object sender, EventArgs e) c. static void okButton_Click(object sender, EventArgs e) d. private int okButton_Click(object sender, EventArgs e) ANSWER: FEEDBACK:

b

a. Incorrect. The keywords public and void are not generated automatically.

You could change the access specifier to public, and the method still would work, but usually you would have no reason to make such a change. b. Correct. When you place a Button named okButton on a Form in the IDE and double-click it, a method is generated with the header: private void okButton_Click(object sender, EventArgs e).

c. Incorrect. The keywords static and void are not generated automatically in the method header. d. Incorrect. The keywords private and int are not generated automatically in the method header.

POINTS: 1 REFERENCES: Issues Using Methods in GUI Programs QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.08 - Appreciate issues using methods in GUI programs DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

26. What will a Click() method that responds to button clicks be by default, due to the fact that it is associated with an object that is a Form? a. local b. static c. qualified d. nonstatic ANSWER: FEEDBACK:

d

a. Incorrect. A Click() method that responds to button clicks is not local by default. b. Incorrect. A Click() method will not be static by default because a static method is called without an object reference.

c. Incorrect. A Click() method that responds to button clicks is not qualified by default. d. Correct. If you create a Click() method that responds to button clicks, it will Copyright Cengage Learning. Powered by Cognero.

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be nonstatic by default because it is associated with an object that is a Form.

POINTS: 1 REFERENCES: Issues Using Methods in GUI Programs QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.08 - Appreciate issues using methods in GUI programs DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

27. If no method access specifier is defined for Main(), what will it be by default? a. public b. static c. private d. inherited ANSWER: FEEDBACK:

c

a. Incorrect. Some programmers prefer to write Main() method headers with public access, but public is not the default access. b. Incorrect. The keyword static is not the default access specifier for Main(). c. Correct. C# programmers often omit the Main() method’s access specifier, making it private by default. d. Incorrect. There is no keyword inherited and it is not the default access specifier for Main().

POINTS: 1 REFERENCES: Alternate Ways to Write a Main() Method Header QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.07 - Understand some alternate ways to write a Main() method header DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

28. When a method resides entirely within another method, and can only be called from within the containing method, what is the method known as? a. It is a local function. b. It is a client function. c. It is a parent function. d. It is a scope function.

ANSWER: FEEDBACK:

a

a. Correct. A local function is a method that resides within another method and can be called only from the containing method. b. Incorrect. A client is a method that uses another method.

c. Incorrect. A parent is not a function; it is a base class.

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d. Incorrect. A scope is not a function; it is the area where a variable or constant is known and can be used.

POINTS: 1 REFERENCES: Writing Methods with No Parameters and No Return Value QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.02 - Write methods with no parameters and no return value DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

29. When a variable or constant is required by multiple methods in a GUI program, where should it be defined? a. Inside one of the methods used by the GUI. b. Inside a nested method shared by both methods. c. Outside of the methods, but inside of the Form class shared by both methods. d. Inside of an inherited class.

ANSWER: FEEDBACK:

c

a. Incorrect. When a variable or constant is required by multiple methods in a GUI program, it should not be defined inside one of the methods. b. Incorrect. When a variable or constant is required by multiple methods in a GUI program, it should not be defined inside a nested method.

c. Correct. When you declare a variable or constant within a method, it is local to that method. If a variable or constant is needed by multiple event-handling methods—for example, by two different Click() methods—then the variables or constants in question must be defined outside the methods (but within the Form class) so that both Click() methods have access to them.

d. Incorrect. When a variable or constant is required by multiple methods in a GUI program, it should not be defined inside an inherited class.

POINTS: 1 REFERENCES: Issues Using Methods in GUI Programs QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.08 - Appreciate issues using methods in GUI programs DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

30. How are the parameters for a Click() method received? a. The method must be called manually by another method. b. The method must be passed the parameters by reference. c. The method receives the parameters automatically when the corresponding Button is pressed. d. The method does not accept any parameters.

ANSWER: FEEDBACK:

c

a. Incorrect. The parameter's Click() method is not received when the method is called manually by another method. b. Incorrect. The parameter's Click() method is not received when the method

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passes the parameters by reference. c. Correct. The parameters received by a Click() method arrive automatically when a user clicks the corresponding Button.

d. Incorrect. The Click() method does accept parameters.

POINTS: 1 REFERENCES: Issues Using Methods in GUI Programs QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.08 - Appreciate issues using methods in GUI programs DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

31. What are the components of a C# method?

ANSWER: In C#, a method must include: * A method declaration, which is also known as a method header or method definition * An opening curly brace * A method body, which is a block of statements that carry out the method's work * A closing curly brace POINTS: 1 REFERENCES: Writing Methods with No Parameters and No Return Value QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.07.01 - Understand methods and implementation hiding DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

32. What are the components of a C# method declaration?

ANSWER: The method declaration defines the rules for using the method. It contains: * Optional declared accessibility * An optional static modifier * The return type for the method * The method name, or identifier * An opening parenthesis * An optional list of method parameters (separated with commas if there is more than one) * A closing parenthesis POINTS: 1 REFERENCES: Writing Methods with No Parameters and No Return Value QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.07.01 - Understand methods and implementation hiding Copyright Cengage Learning. Powered by Cognero.

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33. What are the two most common accessibility levels in C#?

ANSWER: The optional declared accessibility for a method sets limits as to how other methods can use your method. The two levels you will use most frequently are: * Public access, which is established by including a public modifier in the member declaration. This modifier allows access to a method from other classes. * Private access, which is established by including a private modifier in the member declaration or by omitting any accessibility modifier. This modifier limits method access to the class that contains the method.

POINTS: 1 REFERENCES: Writing Methods with No Parameters and No Return Value QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.07.02 - Write methods with no parameters and no return value DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

34. For a method that accepts a parameter, what are the components of the parameter definition that must be included in the method declaration? Show an example of a method declaration with a parameter.

ANSWER: When you write the declaration for a method that accepts a parameter, you need to include the following items within the method declaration parentheses: * The type of the parameter * A local identifier (name) for the parameter For example, consider a public method named DisplaySalesTax(), which displays the result of multiplying a value that represents a selling price by 7%. The method header for a usable DisplaySalesTax() method could be the following: public static void DisplaySalesTax(double saleAmount) POINTS: 1 REFERENCES: Writing Methods That Require a Single Argument QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.07.03 - Write methods that require a single argument DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

35. Write a DisplaySalesTax() method that receives the sales amount and tax rate as doubles, and calculates and displays the sales tax. The method does not return a value.

ANSWER: public static void DisplaySalesTax(double saleAmount, double taxRate) { double tax; Copyright Cengage Learning. Powered by Cognero.

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tax = saleAmount * taxRate; WriteLine("The tax on {0} at {1} is {2}", saleAmount.ToString("C"), taxRate.ToString("P"), tax.ToString("C")); } POINTS: 1 REFERENCES: Writing Methods That Require Multiple Arguments QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.07.04 - Write methods that require multiple arguments DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

36. Describe how nested method calls work. For example, if you have three nested method calls, which method executes first and how are return values propagated? Is there a limit to how many method calls can be nested?

ANSWER: When method calls are placed inside other method calls, the calls are nested method calls. When you write a statement with three nested method calls, for example, the innermost method executes first. Its return value is then used as an argument to the intermediate method, and that return value is used as an argument to the outer method. There is no limit to how "deep" you can go with nested method calls.

POINTS: 1 REFERENCES: Writing Methods That Return a Value QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.07.05 - Write methods that return a value DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

37. You can tell a lot about a built-in method when you see how it is used. What can you tell about the built-in Pow() method (used to raise a number to a power) from the following statement? double result = Math.Pow(2.0, 3.0); ANSWER: From this statement, you know the following about the Pow() method: 1. It is in the Math class because the class name and a dot precede the method call.

2. It is public because you can write a program that uses it.

3. It is static because it is used with its class name and a dot, without any object.

4. It accepts two double parameters.

5. It returns a double or a type that can be promoted automatically to a double (such as an int) because its answer is stored in a double.

POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Writing Methods That Return a Value Subjective Short Answer False

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STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.07.05 - Write methods that return a value DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

38. The keyword static is used with Main() methods in console applications because the method is associated with its containing class and not with an object. Why are Form methods, such as a Click() method that responds to button clicks, nonstatic?

ANSWER: When you create a GUI application and generate a method, such as a Click() method associated with a Button on a Form, the keyword static does not appear in the method header because the method is associated with an object-the Form from which the method-invoking events are sent. For example, if you create a Click() method that responds to button clicks, it will be nonstatic by default because it is associated with an object that is a Form.

POINTS: 1 REFERENCES: Issues Using Methods in GUI Programs QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.07.08 - Appreciate issues using methods in GUI programs DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

39. When writing an event-handling method in a GUI application, what should you consider about a variable's scope?

ANSWER: When you create event-handling methods in a GUI application, you must constantly be aware of which variables and constants are needed by multiple methods. When you declare a variable or constant within a method, it is local to that method. If a variable or constant is needed by multiple event-handling methods-for example, by two different Click() methods-then the variables or constants in question must be defined outside the methods (but within the Form class) so that both Click() methods have access to them. When you write other methods, you can decide what arguments to pass in. But automatically generated event-handling methods have predefined sets of parameters, so you cannot be as flexible in using them as you can with other methods you write.

POINTS: 1 REFERENCES: Issues Using Methods in GUI Programs QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.07.08 - Appreciate issues using methods in GUI programs DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM Copyright Cengage Learning. Powered by Cognero.

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40. Explain how to write a Main() method that accepts parameters. Why might this format be used?

ANSWER: To write a Main() method header that accepts parameters, use the following declaration: static void Main(string[] args).

The phrase string[] args is a parameter to the Main() method. The variable args represents an array of strings that you can pass to Main(). Although you can use any identifier, args is conventional.

Java programmers might prefer this version of Main() because their convention is to write Main() methods with the same parameter. Also, use this format for the Main() method header if you need to access command-line arguments passed in to your application POINTS: 1 REFERENCES: Alternate Ways to Write a Main() Method Header QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.07.07 - Understand some alternate ways to write a Main() method header DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

Match each item with a statement below. a. calling method b. nonstatic method c. object's starting memory address d. local variable e. value parameter f. field g. fully qualified name h. bool i. parameter list j. static REFERENCES: Glossary QUESTION TYPE: Matching HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.07.01 - Understand methods and implementation hiding MVC#.FARR.18.07.02 - Write methods with no parameters and no return value MVC#.FARR.18.07.03 - Write methods that require a single argument MVC#.FARR.18.07.05 - Write methods that return a value MVC#.FARR.18.07.06 - Pass array values to a method MVC#.FARR.18.07.08 - Appreciate issues using methods in GUI programs DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:56 PM

41. A method that calls another method.

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ANSWER: a POINTS: 1

42. A method call that requires an object reference.

ANSWER: b POINTS: 1

43. What is received by an invoked method when an object is passed to it by reference.

ANSWER: c POINTS: 1

44. A variable that is declared in the current method and is known only to that method.

ANSWER: d POINTS: 1

45. A parameter that receives a copy of the value passed to it.

ANSWER: e POINTS: 1

46. Variables that are declared within a class but outside of a method.

ANSWER: f POINTS: 1

47. A name that includes the class name.

ANSWER: g POINTS: 1

48. The return type for a method that returns either true or false.

ANSWER: h POINTS: 1

49. Consists of the data types and parameter names that appear between parentheses in a method header.

ANSWER: i POINTS: 1

50. A method that is called without an object reference.

ANSWER: j POINTS: 1

1. To ensure that the original value of an argument passed to a method remains unchanged after returning from the method, you should use a reference parameter or an output parameter. a. True b. False ANSWER:

False

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Correct

Correct. When you use a reference parameter, output parameter, or parameter array, you pass a memory address to a method, allowing the method to alter the original variable.

Incorrect Incorrect. When you use a reference parameter, output parameter, or parameter array, you pass a memory address to a method, allowing the method to alter the original variable.

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

2. When you use a reference parameter, any passed variable must have an assigned value. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. A passed variable must have an assigned value when a reference parameter is used.

Incorrect Incorrect. A passed variable must have an assigned value when a reference parameter is used.

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

3. You cannot use the out or ref keywords when passing an array to a method. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. You use the keyword ref as a modifier to indicate a reference parameter and the keyword out as a modifier to indicate an output parameter.

Incorrect Incorrect. You use the keyword ref as a modifier to indicate a reference

parameter and the keyword out as a modifier to indicate an output parameter.

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM Copyright Cengage Learning. Powered by Cognero.

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11/20/2019 10:02 AM

4. A method can return at most one value to a method that calls it. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. A method can have only a single return type and can return, at most, only one value.

Incorrect Incorrect. A method can have only a single return type and can return, at most, only one value.

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.03 - Return a reference from a method DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

5. Overloaded methods sharing the same identifier must have the same return type. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. The parameter identifiers in overloaded methods do not matter, nor do the return types of the methods. The only two requirements to overload methods are the same identifier and different parameter lists.

Incorrect Incorrect. The parameter identifiers in overloaded methods do not matter, nor do the return types of the methods. The only two requirements to overload methods are the same identifier and different parameter lists.

POINTS: 1 REFERENCES: Overloading Methods QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.04 - Overload methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

6. In C#, what can be done to ensure that a parameter for a method is required in every method call? a. The parameter can be specified as mandatory. b. The parameter should be hard coded. c. The parameter should be specified as a constant in the class. d. The argument to the called method can be specified as static.

ANSWER: FEEDBACK:

a

a. Correct. A mandatory parameter to a method is one that is required in every method call.

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b. Incorrect. Hard coding a parameter does not ensure that the parameter for a method is required in every method call. c. Incorrect. Specifying a parameter as a constant does not ensure that the parameter for a method is required in every method call.

d. Incorrect. Specifying the argument as static does not ensure that the parameter for a method is required in every method call.

POINTS: 1 REFERENCES: An Overview of C#'s Parameter Types QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.01 - Describe C#’s parameter types DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

7. What type of parameter requires you to indicate the parameter's type and name, and the method receives a copy of the value passed to it? a. reference parameter b. output parameter c. input parameter d. value parameter ANSWER: FEEDBACK:

d

a. Incorrect. A reference parameter receives the parameter's address. A variable sent to a reference parameter is required to have been assigned a value before it is used in the method call. b. Incorrect. An output parameter receives the parameter's address. A variable sent to an output parameter is not required to have been assigned a value before it is used in the method call. c. Incorrect. The term input parameter is not used to describe parameters.

d. Correct. When you use a value parameter in a method header, you indicate the

parameter’s type and name, and the method receives a copy of the value passed to it.

POINTS: 1 REFERENCES: An Overview of C#'s Parameter Types QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.01 - Describe C#’s parameter types DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

8. On occasion, you might want a method to be able to alter a value you pass to it. What type of parameter should you use in this case? a. value parameter b. reference parameter c. optional parameter Copyright Cengage Learning. Powered by Cognero.

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d. global parameter ANSWER: FEEDBACK:

b

a. Incorrect. When you use a value parameter in a method header, you indicate the

parameter’s type and name, and the method receives a copy of the value passed to it. b. Correct. When you use a reference parameter, output parameter, or parameter array, you pass a memory address to a method, allowing the method to alter the original variable. c. Incorrect. An optional parameter to a method is one for which a default value is supplied automatically if you do not explicitly send one as an argument. A parameter is optional when it is given a value in the method declaration. d. Incorrect. Global is not a type of parameter.

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

9. What type of parameters act as aliases, or pseudonyms, for the same memory location occupied by the original variable being passed to a method? a. interface parameters b. pointer parameters c. reference parameters d. value parameters ANSWER: FEEDBACK:

c

a. Incorrect. Interface is not a type of parameter. b. Incorrect. Pointer is not a type of parameter. c. Correct. Reference parameters, output parameters, and parameter arrays do not occupy their own memory locations. Rather, they act as aliases, or pseudonyms (other names), for the same memory location occupied by the values passed to them. d. Incorrect. A value parameter in a method header receives a copy of the value passed to it.

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

10. What modifier is used to indicate that a parameter is used for output? a. ref Copyright Cengage Learning. Powered by Cognero.

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b. params c. get d. out ANSWER: FEEDBACK:

d

a. Incorrect. You use the keyword ref is a modifier to indicate a reference parameter. b. Incorrect. You use the keyword params to indicate a parameter array.

c. Incorrect. The keyword get is not a modifier. d. Correct. You use the keyword out as a modifier to indicate an output parameter.

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

11. What type of parameter requires that the argument used to call the method must have an assigned value? a. output b. optional c. reference d. formal ANSWER: FEEDBACK:

c

a. Incorrect. An output parameter in a method header receives the parameter's address. A variable sent to an output parameter is not required to have been assigned a value before it is used in the method call. b. Incorrect. An optional parameter to a method is one for which a default value is supplied automatically if you do not explicitly send one as an argument. A parameter is optional when it is given a value in the method declaration. c. Correct. A reference parameter in a method header receives the parameter's address. A variable sent to a reference parameter is required to have been assigned a value before it is used in the method call. d. Incorrect. A formal parameter is a parameter within a method header that accepts a value.

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.01 - Describe C#’s parameter types DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

12. For the sake of convenience, what parameter type can be used when the variable to be passed does not have an assigned value at the time the method is called?

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a. reference parameter b. value parameter c. mandatory parameter d. output parameter ANSWER: FEEDBACK:

d

a. Incorrect. A reference parameter in a method header receives the parameter’s address; a variable sent to a reference parameter is required to have been assigned a value before it is used in the method call. b. Incorrect. A value parameter in a method header receives a copy of the value passed to it. c. Incorrect. Mandatory parameters are method parameters for which an argument is required in every method call. d. Correct. An output parameter in a method header receives the parameter’s address; a variable sent to an output parameter is not required to have been assigned a value before it is used in the method call.

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

13. How can you avoid throwing an exception during data conversion when a value cannot be converted to an appropriate type? a. You can use the Convert() method to force the conversion. b. You can use the ReadLine() method to convert the data to a string. c. You can use the TryParse() method to attempt conversion, or assign a 0 to the variable if it is not possible. d. You can use the Parse() method, which may result in garbage being returned.

ANSWER: FEEDBACK:

c

a. Incorrect. The Convert() method cannot be used to avoid throwing an exception during data conversion. b. Incorrect. You can use the ReadLine() method to create an interactive program that accepts user input from the keyboard. c. Correct. You can handle data conversion exceptions by the TryParse() method. The TryParse() method converts a string to the correct data type and stores the result in a passed variable if possible. If conversion is not possible, the method assigns 0 to the variable. d. Incorrect. The Parse() method converts a string to a number. It cannot be used to avoid throwing an exception during data conversion.

POINTS: REFERENCES: QUESTION TYPE:

1 Passing Parameters by Reference Multiple Choice

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HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

14. What should you utilize when you don't know how many arguments you might eventually send to a method? a. value parameter b. parameter array c. reference parameter d. output parameter ANSWER: FEEDBACK:

b

a. Incorrect. A value parameter in a method header receives a copy of the value passed to it. b. Correct. When you don’t know how many arguments of the same data type might eventually be sent to a method, you can declare a parameter array. c. Incorrect. A reference parameter in a method header receives the parameter's address. A variable sent to a reference parameter is required to have been assigned a value before it is used in the method call. d. Incorrect. An output parameter in a method header receives the parameter's address. A variable sent to an output parameter is not required to have been assigned a value before it is used in the method call.

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

15. When declaring a method, how any params keywords are permitted? a. Only as many as there will be arguments. b. Only one params keyword is permitted. c. Two, provided there is a nested method. d. There is no limit to the use of the keyword.

ANSWER: FEEDBACK:

b

POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Passing Parameters by Reference Multiple Choice False

a. Incorrect. Many params are not permitted when declaring a method. b. Correct. Only one params keyword is permitted in a method declaration. c. Incorrect. Two params are not permitted when declaring a method. d. Incorrect. There is a limit to the use of the keyword params.

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LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

16. What technique allows for the ability to write multiple versions of a method using the same method name? a. overloading b. interfacing c. inheriting d. implementation hiding ANSWER: FEEDBACK:

a

a. Correct. Overloading involves the ability to write multiple versions of a method using the same method name. b. Incorrect. Interface is not a technique; it is a collection of abstract methods (and perhaps other methods) that can be used by any class as long as the class provides a definition to override the interface's abstract definitions. c. Incorrect. Inheritance is the ability to extend a class as to create a more specific class that contains all the attributes and methods of a more general class. d. Incorrect. Implementation hiding is the technique of keeping the details of a method's operations hidden.

POINTS: 1 REFERENCES: Overloading Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.04 - Overload methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

17. A method's name and parameter list both constitute what component of the method? a. The return type for the method b. The method stamp. c. The method's signature. d. The method's type.

ANSWER: FEEDBACK:

c

a. Incorrect. The return type for a method can be any type used in the C# programming language, which includes the basic built-in types int, double, char, and so on. b. Incorrect. A stamp is not a component of a method. c. Correct. A method’s name and parameter list constitute the method’s signature. d. Incorrect. A method’s return type is known more succinctly as a method’s type.

POINTS: 1 REFERENCES: Overloading Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.04 - Overload methods Copyright Cengage Learning. Powered by Cognero.

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18. What is a method considered to be when there is a potential for a situation in which the compiler cannot determine what method to use? a. overloaded b. ambiguous c. polymorphic d. hidden ANSWER: FEEDBACK:

b

a. Incorrect. Overloading is using one term to indicate diverse meanings. In C#, methods are overloaded when there are multiple versions with the same name but different parameter lists.

b. Correct. Ambiguous describes overloaded methods between which the compiler cannot distinguish.

c. Incorrect. Polymorphism is the ability to create methods that act appropriately depending on the context.

d. Incorrect. Hidden is not a term commonly used to describe a method.

POINTS: 1 REFERENCES: Avoiding Ambiguous Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.05 - Recognize and avoid ambiguous methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

19. What are methods with identical names that have identical parameter lists but different return types? a. applicable methods b. illegal methods c. overloaded methods d. related methods ANSWER: FEEDBACK:

b

a. Incorrect. Applicable methods are all the methods that can be used by a method call. b. Correct. Methods with identical names that have identical parameter lists but different return types are not overloaded—they are illegal. c. Incorrect. Overloading involves the ability to write multiple versions of a method using the same method name.

d. Incorrect. Related is not a term that describes methods with identical names that have identical parameter lists.

POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Avoiding Ambiguous Methods Multiple Choice False

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LEARNING OBJECTIVES: MVC#.FARR.18.08.05 - Recognize and avoid ambiguous methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

20. What type of parameter to a method will have a value automatically supplied if you do not explicitly send one as an argument? a. actual parameter b. value parameter c. default parameter d. optional parameter ANSWER: FEEDBACK:

d

a. Incorrect. Actual parameters are arguments within a method call. b. Incorrect. When you use a value parameter in a method header, you indicate the

parameter’s type and name, and the method receives a copy of the value passed to it. A variable that is used as an argument to a method with a value parameter must have a value assigned to it.

c. Incorrect. Although an optional parameter has a default value, default parameter is not a commonly used term.

d. Correct. An optional parameter to a method is one for which a default value is supplied automatically if you do not explicitly send one as an argument. A parameter is optional when it is given a value in the method declaration.

POINTS: 1 REFERENCES: Using Optional Parameters QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.06 - Use optional parameters DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

21. What type of parameter can be given a default value? a. value parameter b. reference parameter c. output parameter d. array parameter ANSWER: FEEDBACK:

a

a. Correct. Only value parameters can be given default values. Those that use ref, out, and params cannot have default values. b. Incorrect. A reference parameter uses the keyword ref, which cannot have a default value. c. Incorrect. An output parameter uses the keyword out, which cannot have a default value. d. Incorrect. An array parameter uses the keyword params, which cannot have a default value.

POINTS:

1

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REFERENCES: Using Optional Parameters QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.01 - Describe C#’s parameter types DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

22. When adding optional parameters in a parameter list, what is a valid requirement? a. The parameters must all be placed locally. b. The parameters must appear to the right of all mandatory parameters. c. The parameters must have constant values. d. The parameters must be defined globally.

ANSWER: FEEDBACK:

b

a. Incorrect. When adding optional parameters in a parameter list, the parameters do not have to be placed locally. b. Correct. Any optional parameters in a parameter list must appear to the right of the mandatory parameters. c. Incorrect. When adding optional parameters in a parameter list, the parameters do not have to be constant values. d. Incorrect. When adding optional parameters in a parameter list, the parameters do not have to be defined globally.

POINTS: 1 REFERENCES: Using Optional Parameters QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.06 - Use optional parameters DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

23. If a default value is assigned to any variable in a method's parameter list, what must all parameters to the right of that parameter have? a. An explicit cast. b. An implicit cast. c. A local keyword. d. A default value.

ANSWER: FEEDBACK:

d

a. Incorrect. An explicit cast purposefully assigns a value to a different data type. It involves placing the desired result type in parentheses followed by the variable or constant to be cast. b. Incorrect. An implicit cast is the automatic transformation that occurs when a value is assigned to a type with higher precedence. c. Incorrect. If a default value is assigned to any variable in a method's parameter, all parameters do not have to have a local keyword to the right of the parameter. d. Correct. An optional parameter to a method is one for which a default value is supplied automatically if you do not explicitly send one as an argument. Any

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optional parameters in a parameter list must appear to the right of the mandatory parameters.

POINTS: 1 REFERENCES: Using Optional Parameters QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.06 - Use optional parameters DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

24. When naming an argument in a method call using its parameter name, what must come before the value? a. comma b. dot c. colon d. semicolon ANSWER: FEEDBACK:

c

a. Incorrect. Commas are used to separate the unnamed arguments. b. Incorrect. A dot should not come before the value. c. Correct. You name an argument using its parameter name and a colon before the value. d. Incorrect. A semicolon should be placed to the right of the value because all statements in C# end with a semicolon.

POINTS: 1 REFERENCES: Using Optional Parameters QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.06 - Use optional parameters DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

25. What is another name for unnamed method arguments? a. self-documenting arguments b. optional arguments c. default arguments d. positional arguments ANSWER: FEEDBACK:

d

a. Incorrect. Self-documenting describes programs that provide built-in explanations to make the code clearer to readers and therefore easier for others to modify in the future. b. Incorrect. Optional arguments are not unnamed arguments.

c. Incorrect. Default arguments are not unnamed arguments. d. Correct. Each unnamed argument is also known as a positional argument.

POINTS:

1

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REFERENCES: Using Optional Parameters QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.06 - Use optional parameters DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

26. What type of arguments are ignored for betterness purposes on argument conversions? a. default arguments b. explicit arguments c. local arguments d. optional arguments ANSWER: FEEDBACK:

d

a. Incorrect. Default arguments are not ignored for betterness purposes on argument conversions. b. Incorrect. Explicit arguments are not ignored for betterness purposes on argument conversions. c. Incorrect. Local arguments are not ignored for betterness purposes on argument conversions. d. Correct. The rules for betterness on argument conversions are applied only for arguments that are given explicitly. In other words, omitted optional arguments are ignored for betterness purposes.

POINTS: 1 REFERENCES: Using Optional Parameters QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.06 - Use optional parameters DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

27. What statement regarding reference parameters is accurate? a. When you declare a reference parameter in a method header, the argument used to call the method does not require a value. b. Reference parameters occupy their own memory locations. c. Reference parameters act as aliases, or pseudonyms, for the same memory location occupied by the values passed to them. d. The params keyword is used to indicate a reference parameter.

ANSWER: FEEDBACK:

c

a. Incorrect. When you declare a reference parameter in a method header, the argument used to call the method must have been assigned a value. b. Incorrect. Reference parameters have the same memory location that is occupied by the values that are passed to them. c. Correct. Reference parameters, output parameters, and parameter arrays do not occupy their own memory locations. Rather, they act as aliases, or pseudonyms (other names), for the same memory location occupied by the values passed to

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them.

d. Incorrect. The params keyword is used to indicate a parameter array.

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

28. Under what circumstances can you return a reference from a method? a. Only when the method performing the return is a static type method. b. Only when the reference is for an array defined within the method's scope. c. Only when a method is returning optional parameters with known values as the reference. d. Only when it is safe to return, such as returning a reference from a method if the reference was passed into the method.

ANSWER: FEEDBACK:

d

a. Incorrect. The method performing the return does not have to be a static type method.

b. Incorrect. You can return a reference for an array that is not defined within the method's scope. c. Incorrect. You can return a reference when a method is returning optional parameters without known values as the reference. d. Correct. You can return only references that C# considers ―safe to return.‖ For example, you can return a reference from a method if the reference was passed into the method but cannot if the value was passed into the method.

POINTS: 1 REFERENCES: Returning a Reference from a Method QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.03 - Return a reference from a method DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

29. What Visual Studio IDE feature can be used to discover information about methods you are using? a. CodeIntuit b. IntelliSense c. MagicMethod d. BitDissect ANSWER: FEEDBACK:

b

a. Incorrect. CodeIntuit is not a Visual Studio IDE feature. b. Correct. When you use the IDE to create programs, Visual Studio’s IntelliSense features provide information about methods you are using.

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c. Incorrect. MagiMethod is not a Visual Studio IDE feature. d. Incorrect. BitDissect is not a Visual Studio IDE feature.

POINTS: 1 REFERENCES: Overloading Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.04 - Overload methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

30. What statement regarding overloading methods is accurate? a. When you create overloaded methods, you write multiple methods with different names but the same parameter list. b. When you overload a method, the number of parameters must be the same, but the types can be different. c. An overloaded method must have parameters. d. The compiler is able to discern which overloaded method version to use based on the arguments you supply for a method call.

ANSWER: FEEDBACK:

d

a. Incorrect. Overloading involves the ability to write multiple versions of a method using the same method name but different parameter lists. b. Incorrect. When you overload a C# method, you write multiple method implementations with the same name but different parameter lists. c. Incorrect. An overloaded method can be used with no parameters.

d. Correct. The compiler understands which method to use based on the arguments you use in a method call.

POINTS: 1 REFERENCES: Overloading Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.04 - Overload methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

Match each item with a statement below. a. formal parameter b. applicable methods c. implementation hiding d. actual parameter e. value parameter f. output parameter g. ref modifier h. parameter array Copyright Cengage Learning. Powered by Cognero.

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i. self-documentation j. named argument REFERENCES: Glossary QUESTION TYPE: Matching HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.08.01 - Describe C#’s parameter types MVC#.FARR.18.08.02 - Pass parameters by reference MVC#.FARR.18.08.04 - Overload methods MVC#.FARR.18.08.06 - Use optional parameters DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

31. A parameter in a method header.

ANSWER: a POINTS: 1

32. A set of methods that can accept a call given the passed argument list.

ANSWER: b POINTS: 1

33. A programming principle compromised by named arguments.

ANSWER: c POINTS: 1

34. An argument in a calling method.

ANSWER: d POINTS: 1

35. A parameter that receives a copy of the value passed to it.

ANSWER: e POINTS: 1

36. Convenient when a variable might not have an assigned value when passed to a method.

ANSWER: f POINTS: 1

37. Declares a reference parameter.

ANSWER: g POINTS: 1

38. A local array declared within the method header by using the keyword params.

ANSWER: h POINTS: 1

39. Named parameters can support this programming principle by providing clarity about the intended use of an argument.

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ANSWER: i POINTS: 1

40. A method argument that is preceded with the name of the called method's parameter to which it will be assigned.

ANSWER: j POINTS: 1

41. What are the four types of mandatory parameters supported by C#?

ANSWER: The four types of mandatory parameters are: * Value parameters, when they are declared without default values * Reference parameters, which are declared with the ref modifier * Output parameters, which are declared with the out modifier * Parameter arrays, which are declared with the params modifier POINTS: 1 REFERENCES: An Overview of C#'s Parameter Types QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.08.01 - Describe C#’s parameter types DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

42. What is the difference between a reference parameter and an output parameter?

ANSWER: Reference and output parameters differ as follows: * When you declare a reference parameter in a method header, the argument used to call the method must have been assigned a value. * When you declare an output parameter, the argument used in the call need not contain an original, assigned value. However, an output parameter must be assigned a value before the method ends.

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

43. Given the following program, write the InputMethod() method. It should read two values from the user and assign them to the int variables first and second, which are then printed out in the code shown below. using static System.Console; class InputMethodDemo { static void Main() Copyright Cengage Learning. Powered by Cognero.

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{ int first, second; InputMethod(out first, out second); WriteLine("After InputMethod first is {0}", first); WriteLine("and second is {0}", second); } } ANSWER:

InputMethod() should be similar to the following: private static void InputMethod(out int one, out int two) { string s1, s2; Write("Enter first integer "); s1 = ReadLine(); Write("Enter second integer "); s2 = ReadLine(); one = Convert.ToInt32(s1); two = Convert.ToInt32(s2); }

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

44. What are two options for writing a called method that results in altering a single value in the calling method?

ANSWER: When you need a method to alter a single value, you have two options: * Use a return type. You can send an argument to a method that accepts a value parameter, alter the local version of the variable within the method, return the altered value, and assign the return value to the original variable back in the calling method. * Pass by reference. You can send an argument to a method that accepts a reference parameter or an output parameter, and alter the value at the original memory location within the method.

POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM Copyright Cengage Learning. Powered by Cognero.

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45. Write the DisplayStrings() method called in the code below using a parameter array declared in the method header. The method should write its arguments in a single line, followed by a newline. What will the output be after running Main()? using static System.Console; class ParamsDemo { static void Main() { string[] names = {"Mark", "Paulette", "Carol"}; DisplayStrings("Ginger"); DisplayStrings("George", "Maria", "Thomas"); DisplayStrings(names); } } ANSWER: The DisplayStrings() method should be similar to the following code: private static void DisplayStrings(params string[] people) { foreach(string person in people) Write("{0} ", person); WriteLine("\n"); } The output should be: Ginger George Maria Thomas Mark Paulette Carol POINTS: 1 REFERENCES: Passing Parameters by Reference QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.08.02 - Pass parameters by reference DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

46. Describe the similarities and differences among method versions when the method is overloaded.

ANSWER: Methods are overloaded correctly when they have the same identifier but their parameter lists are different. Parameter lists differ when the number and order of types within the lists are unique. For example, you could write several methods with the same identifier and one method could accept an int, another two ints, and another three ints. A fourth overloaded method could accept an int followed by a double, and another could accept a double followed by an int. Yet another version could accept no parameters. The parameter identifiers in overloaded methods do not matter, and neither do the return types of the method. Only the method identifier and parameter list types cause a method to be overloaded.

POINTS:

1

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REFERENCES: Overloading Methods QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.08.04 - Overload methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

47. Suppose that you create overloaded method versions with the following declarations: private static void MyMethod(double d) private static void MyMethod(float f) Would MyMethod() run if it is called with an integer argument? Describe how C# determines which, if either, method should run when MyMethod() is called.

ANSWER: If you call MyMethod() using an integer argument, both of the above versions are applicable methods, meaning that either method on its own could accept a call that uses an int. However, if both methods exist in the same class (making them overloaded), the second version will execute because it is a better match for the method call. The rules that determine which method version to call are known as betterness rules. If no method version with an int parameter exists, a float is a better match than a double based on the betterness rules for data type conversion POINTS: 1 REFERENCES: Overloading Methods QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.08.04 - Overload methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

48. What programming principle is violated when using named arguments and why is this important?

ANSWER: A disadvantage to using named arguments is that the calling method becomes linked to details within the method. This means that an important principle of programmingmethod implementation hiding-is compromised. If the parameter name in the called method is changed in the future, the client method also will have to change.

POINTS: 1 REFERENCES: Using Optional Parameters QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.08.06 - Use optional parameters DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

49. Given the following code, describe a situation that would make the code ambiguous to the C# compiler: Copyright Cengage Learning. Powered by Cognero.

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using static System.Console; public class AmbiguousMethods { static void Main() { int iNum = 20; double dNum = 4.5; SimpleMethod(iNum, dNum); // calls first version SimpleMethod(dNum, iNum); // calls second version SimpleMethod(iNum, iNum); // error! Call is [JF1]ambiguous. } private static void SimpleMethod(int i, double d) { WriteLine("Method receives int and double"); } private static void SimpleMethod(double d, int i) { WriteLine("Method receives double and int"); } } [JF1]These comments in the code give away the answer.

ANSWER:

In the Main() method above, a call to SimpleMethod() with an integer argument first and a double argument second executes the first version of the method, and a call to SimpleMethod() with a double argument first and an integer argument second executes the second version of the method. With each of these calls, the compiler can find an exact match for the arguments you send.

However, if you call SimpleMethod() using two integer arguments, an ambiguous situation arises because there is no exact match for the method call.

Because the first integer could be promoted to a double (matching the second version of the overloaded method), or the second integer could be promoted to a double (matching the first version), the compiler does not know which version of SimpleMethod() to use, and the program will not compile or execute.

POINTS: 1 REFERENCES: Avoiding Ambiguous Methods QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.08.05 - Recognize and avoid ambiguous methods DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

50. Given the following two method signatures, explain the reasoning behind how the C# compiler determines which method version to invoke for the call MyMethod(12): private static void MyMethod(int a) private static void MyMethod(int a, char b = 'B') ANSWER: If two signatures are equally good, the one that does not omit optional parameters is Copyright Cengage Learning. Powered by Cognero.

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considered better. If either method existed alone, the call MyMethod(12) would work. But when the two coexist, the first version is better because no optional parameters are omitted.

POINTS: 1 REFERENCES: Using Optional Parameters QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.08.06 - Use optional parameters DATE CREATED: 5/16/2017 12:57 PM DATE MODIFIED: 11/15/2019 3:57 PM

1. If you don't write a constructor for a class object, C# writes one for you. a. True b. False ANSWER: FEEDBACK:

True Correct. When you don’t write a constructor for a class, C# writes one for you, and the name of the constructor is always the same as the name of the class whose objects it constructs.

Incorrect Incorrect. When you don’t write a constructor for a class, C# writes one for you, and the name of the constructor is always the same as the name of the class whose objects it constructs.

Correct

POINTS: 1 REFERENCES: Creating Objects QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.03 - Create objects DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 3:59 PM

2. Only nonstatic methods receive a this reference. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. Only nonstatic methods receive a this reference.

Incorrect Incorrect. Only nonstatic methods receive a this reference.

POINTS: 1 REFERENCES: Understanding the this Reference QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.06 - Use the this reference DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 8:48 AM Copyright Cengage Learning. Powered by Cognero.

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3. You can overload an operator for a built-in data type. For example, you can change the meaning of + between two ints. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. You cannot overload an operator for a built-in data type. For example, you cannot change the meaning of + between two ints.

Incorrect Incorrect. You cannot overload an operator for a built-in data type. For example, you cannot change the meaning of + between two ints.

POINTS: 1 REFERENCES: Overloading Operators QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.09 - Overload operators DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 8:49 AM

4. When you create an array of objects, the array holds the actual value of each of the objects. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. When you create an array from a value type, such as int or char, the array holds the actual values.

Incorrect Incorrect. When you create an array from a value type, such as int or char, the array holds the actual values.

POINTS: 1 REFERENCES: Declaring an Array of Objects QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.10 - Declare object arrays and use methods with them DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 3:59 PM

5. A GUI object, such as a Button, is represented as an object that cannot encapsulate any methods. a. True b. False ANSWER: FEEDBACK:

False

POINTS:

1

Correct. The objects in GUI applications, such as Buttons, encapsulate properties and methods.

Incorrect Incorrect. The objects in GUI applications, such as Buttons, encapsulate properties and methods.

Correct

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REFERENCES: Understanding GUI Application Objects QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.12 - Understand GUI application objects DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 8:51 AM

6. Where are the data components of a class that differ for each object stored? a. Inside of instance variables. b. In variable unit states. c. Inside constants d. Inside parent object relationships.

ANSWER: FEEDBACK:

a

a. Correct. The data components of a class that differ for each object are stored in instance variables. b. Incorrect. Data components of a class that differ for each object are not stored in variable unit states. c. Incorrect. Data components of a class that differ for each object are not stored inside constants. d. Incorrect. Data components of a class that differ for each object are not stored inside parent object relationships.

POINTS: 1 REFERENCES: Understanding Class Concepts QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.01 - Describe class concepts DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/18/2019 11:35 AM

7. What is another name used for instance variables in order to help distinguish them from other variables you might use? a. states b. relationships c. instantiations d. fields ANSWER: FEEDBACK:

d

a. Incorrect. A state is the set of attributes of an object's instance variable. b. Incorrect. Relationships is not another name used for instance variables. c. Incorrect. Instantiations is not another name used for instance variables. d. Correct. Instance variables also are called fields to help distinguish them from other variables you might use.

POINTS: REFERENCES: QUESTION TYPE:

1 Understanding Class Concepts Multiple Choice

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8. What are the set of attributes of an object's instance variable known as? a. The object's relationship. b. The object's state. c. The object's class instantiation. d. The object's fields.

ANSWER: FEEDBACK:

b

a. Incorrect. A relationship is not a set of attributes of an object's instance variable. b. Correct. The data field values of an object are also called its attributes, and the set of attributes is known as an object’s state. c. Incorrect. An instantiation of a class is a created object.

d. Incorrect. Fields are instance variables within a class.

POINTS: 1 REFERENCES: Understanding Class Concepts QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.01 - Describe class concepts DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 3:59 PM

9. Besides being known as a class client, what is a class that instantiates objects of another prewritten class known as? a. a class state b. a class instantiation c. a class user d. a server class ANSWER: FEEDBACK:

c

a. Incorrect. The data field values of an object are also called its attributes, and the set of attributes is known as an object’s state. b. Incorrect. An instantiation of a class is a created object.

c. Correct. A program or class that instantiates objects of another prewritten class is a class client or class user. d. Incorrect. A server class does not instantiate objects of another prewritten class.

POINTS: 1 REFERENCES: Understanding Class Concepts QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.01 - Describe class concepts DATE CREATED: 5/16/2017 12:58 PM Copyright Cengage Learning. Powered by Cognero.

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10. What class access modifier means that access to the class is not limited? a. protected b. private c. internal d. public ANSWER: FEEDBACK:

d

a. Incorrect. The protected class access modifier means access to the class is limited to the class and to any classes derived from the class. b. Incorrect. The private class access modifier means access is limited to another class to which the class belongs. In other words, a class can be private if it is contained within another class, and only the containing class should have access to the private class.

c. Incorrect. The internal class access modifier means access is limited to the assembly to which the class belongs. d. Correct. The public class access modifier means access to the class is not limited.

POINTS: 1 REFERENCES: Creating a Class from Which Objects Can Be Instantiated QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.02 - Create classes from which objects can be instantiated DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:09 AM

11. What class access modifier can be used to indicate that access to the class is limited to the class and to any classes derived from the class? a. internal b. private c. protected d. public ANSWER: FEEDBACK:

c

a. Incorrect. The internal class access modifier means access is limited to the assembly to which the class belongs. b. Incorrect. The private class access modifier means access is limited to another class to which the class belongs. In other words, a class can be private if it is contained within another class, and only the containing class should have access to the private class.

c. Correct. The protected class access modifier means access to the class is limited to the class and to any classes derived from the class. d. Incorrect. The public class access modifier means access to the class is not limited.

POINTS:

1

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REFERENCES: Creating a Class from Which Objects Can Be Instantiated QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.02 - Create classes from which objects can be instantiated DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:11 AM

12. What class access modifier should you utilize to limit access to the assembly (a group of code modules compiled together) to which the class belongs? a. private b. internal c. protected d. public ANSWER: FEEDBACK:

b

a. Incorrect. The private class access modifier means access is limited to another class to which the class belongs. In other words, a class can be private if it is contained within another class, and only the containing class should have access to the private class.

b. Correct. The internal class access modifier means access is limited to the assembly to which the class belongs. c. Incorrect. The protected class access modifier means access to the class is limited to the class and to any classes derived from the class. d. Incorrect. The public class access modifier means access to the class is not limited.

POINTS: 1 REFERENCES: Creating a Class from Which Objects Can Be Instantiated QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.02 - Create classes from which objects can be instantiated DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:12 AM

13. What class access modifier is used to indicate that access is limited to another class to which the class belongs? a. private b. internal c. protected d. public ANSWER: FEEDBACK:

a

a. Correct. The private class access modifier means access is limited to another class to which the class belongs. In other words, a class can be private if it is contained within another class, and only the containing class should have access to the private class.

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b. Incorrect. The internal class access modifier means access is limited to the assembly to which the class belongs. c. Incorrect. The protected class access modifier means access to the class is limited to the class and to any classes derived from the class. d. Incorrect. The public class access modifier means access to the class is not limited.

POINTS: 1 REFERENCES: Creating a Class from Which Objects Can Be Instantiated QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.02 - Create classes from which objects can be instantiated DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:13 AM

14. What happens if you do not explicitly include an access specifier? a. Its access modifier will be public by default. b. It will be assumed as an internal field. c. Its access modifier will be private by default. d. It will be set to protected.

ANSWER: FEEDBACK:

c

a. Incorrect. If you do not explicitly include an access specifier, it will not be set to public. b. Incorrect. If you do not explicitly include an access specifier, it will not be assumed as an internal field. c. Correct. If you do not explicitly include an access specifier, class access is private by default. d. Incorrect. If you do not explicitly include an access specifier, it will not be set to protected.

POINTS: 1 REFERENCES: Creating a Class from Which Objects Can Be Instantiated QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.02 - Create classes from which objects can be instantiated DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:14 AM

15. Using private fields within classes is an example of what feature found in all object-oriented languages? a. information hiding b. polymorphism c. inheritance d. overloading ANSWER:

a

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a. Correct. Using private fields within classes is an example of information hiding, a feature found in all object-oriented languages. b. Incorrect. Polymorphism is the ability to create methods that act appropriately depending on the context. c. Incorrect. Inheritance is the ability to extend a class so as to create a more specific class that contains all the attributes and methods of a more general class.

The extended class usually contains new attributes or methods as well. d. Incorrect. Overloading is using one term to indicate diverse meanings. In C#, methods are overloaded when there are multiple versions with the same name but different parameter lists.

POINTS: 1 REFERENCES: Creating a Class from which Objects Can Be Instantiated QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.02 - Create classes from which objects can be instantiated DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:15 AM

16. Predefined types such as int, double, and char are all examples of what component of the C# language? a. reference types b. value types c. output types d. pointer types ANSWER: FEEDBACK:

b

a. Incorrect. Reference types are data types that hold a memory address. b. Correct. Value types are data types that hold a value. They are predefined types such as int, double, and char. c. Incorrect. Output types are not predefined types. d. Incorrect. Pointer types are not predefined types.

POINTS: 1 REFERENCES: Creating Objects QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.03 - Create objects DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/18/2019 11:39 AM

17. What do accessors do within the C# language? a. They define how an instantiation of a class behaves. b. They control access to the various properties of a class. c. They provide access to a field of a class. d. They specify the statements that execute when a class's fields are accessed.

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d

a. Incorrect. Accessors do not define how an instantiation of a class behaves. b. Incorrect. Accessors do not control access to the various properties of a class. c. Incorrect. Accessors do not provide access to a field of a class. d. Correct. Properties have accessors that specify the statements that execute when a class’s fields are accessed.

POINTS: 1 REFERENCES: Creating Objects QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.04 - Create properties, including auto-implemented properties DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 3:59 PM

18. A parameter that is undeclared and that gets its value automatically is considered to be what type of parameter? a. implicit b. explicit c. instance d. property ANSWER: FEEDBACK:

a

a. Correct. An implicit parameter is undeclared and gets its value automatically. b. Incorrect. An explicit parameter is declared. c. Incorrect. An instance is not a parameter; it is a single instantiation of an object type. d. Incorrect. A property is a member of a class that provides access to a field of a class. Properties define how fields will be set and retrieved.

POINTS: 1 REFERENCES: Creating Properties QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.04 - Create properties, including auto-implemented properties DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:16 AM

19. What reference is passed implicitly and invisibly to every instance method and property accessor? a. static b. object c. use d. this ANSWER: FEEDBACK:

d

a. Incorrect. The keyword static indicates that a method will be executed through a class and not by an object.

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b. Incorrect. Object is a class type in the System namespace that is the ultimate base class for all other types. c. Incorrect. Although using is a C# keyword, use is not a reference.

d. Correct. The implicitly passed reference is the this reference, which is the address of the invoking object.

POINTS: 1 REFERENCES: Understanding the this Reference QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.06 - Use the this reference DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:17 AM

20. What kind of constructor takes no arguments whatsoever? a. object constructor b. default constructor c. construct initializer d. construct array ANSWER: FEEDBACK:

b

a. Incorrect. A constructor is a method that instantiates (creates an instance of) an object, but it might or might not require arguments. b. Correct. A default constructor is a parameterless constructor, which does not take arguments. c. Incorrect. A constructor initializer is a clause that indicates that another instance of a class constructor should be executed before any statements in the current constructor body. d. Incorrect. An array is not a constructor.

POINTS: 1 REFERENCES: Understanding Constructors QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.07 - Write and use constructors DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:18 AM

21. As an alternative to repeating code in multiple constructors, what can be used to indicate that another instance of a class constructor should be executed before any statements in the current constructor body? a. parameterless constructor b. value constructor c. constructor initializer d. default constructor ANSWER: FEEDBACK:

c

a. Incorrect. A parameterless constructor is one that takes no arguments.

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b. Incorrect. A value is not a constructor. c. Correct. A constructor initializer is a clause that indicates that another instance of a class constructor should be executed before any statements in the current constructor body. d. Incorrect. A default constructor is a parameterless constructor.

POINTS: 1 REFERENCES: Understanding Constructors QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.07 - Write and use constructors DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 3:59 PM

22. Classes that support simple data items each contain a method that provides the details of how items in the class compare to each other. What is the name of this method? a. Equals() b. Less() c. IndexOf() d. CompareTo() ANSWER: FEEDBACK:

d

a. Incorrect. Equals() determines whether two Object instances are equal. b. Incorrect. Less() is not a built-in method. c. Incorrect. IndexOf() finds the first index of a character or substring. d. Correct. Each of the classes that support simple data items contain a method named CompareTo(), which provides the details about how the basic data types compare to each other.

POINTS: 1 REFERENCES: Declaring an Array of Objects QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.10 - Declare object arrays and use methods with them DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:19 AM

23. What consists of abstract methods (and perhaps other members) that can be used by any class, as long as the class overrides the abstract method definitions? a. A C# multifile assembly. b. A defined framework. c. A properly implemented interface. d. A class destructor.

ANSWER: FEEDBACK:

c

a. Incorrect. A multifile assembly is a group of files containing methods that work together to create an application.

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b. Incorrect. A defined framework does not consist of abstract methods that can be used by any class. c. Correct. An interface is a data type, like a class, except it is a collection of empty, abstract methods (and perhaps other members) that can be used by any class as long as the class provides definitions to override the interface’s do-nothing method definitions. d. Incorrect. A destructor is a method that contains the actions performed when an instance of a class is destroyed.

POINTS: 1 REFERENCES: Declaring an Array of Objects QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.04 - Create properties, including auto-implemented properties DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 3:59 PM

24. What happens when a method overrides another method? a. It instantiates that method and takes over its properties. b. It takes precedence over the original method, hiding it. c. It overloads the original method, allowing for varying parameters. d. It extends the original method, adding additional functionality.

ANSWER: FEEDBACK:

b

a. Incorrect. When a method overrides another method, it does not instantiate that method and take over its properties. b. Correct. When a method overrides another method, it takes precedence over the method and is used instead of the original version. The methods in an interface are empty, and any class that uses them must contain a new version that provides the details and is used instead. c. Incorrect. A method that overrides another method does not overload the original method. d. Incorrect. A method that overrides another method does not extend the original method.

POINTS: 1 REFERENCES: Declaring an Array of Objects QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.10 - Declare object arrays and use methods with them DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:20 AM

25. What interface in C# contains the definition for the CompareTo() method that compares one object to another and returns an integer? a. IComparable b. Comparable c. ICompareTo Copyright Cengage Learning. Powered by Cognero.

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d. CompareTo ANSWER: FEEDBACK:

a

a. Correct. An IComparable interface contains the definition for the CompareTo() method that compares one object to another and returns an integer. b. Incorrect. Comparable is not an interface in C#.

c. Incorrect. ICompareTo is not an interface in C#. d. Incorrect. CompareTo is not an interface in C#.

POINTS: 1 REFERENCES: Declaring an Array of Objects QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.10 - Declare object arrays and use methods with them DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/18/2019 11:40 AM

26. What contains the actions you require when an instance of a class is destroyed, such as when the instance goes out of scope? a. class constructor b. constructor initializer c. destructor d. parameterless constructor ANSWER: FEEDBACK:

c

a. Incorrect. A constructor is a method that instantiates (creates an instance of) an object. b. Incorrect. A constructor initializer is a clause that indicates that another instance of a class constructor should be executed before any statements in the current constructor body. c. Correct. A destructor contains the actions required when an instance of a class is destroyed. d. Incorrect. A parameterless constructor is one that takes no arguments.

POINTS: 1 REFERENCES: Understanding Destructors QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.11 - Write destructors DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 3:59 PM

27. What statement regarding the use of destructors is accurate? a. A destructor performs actions when a class is instantiated. b. A destructor must be explicitly created. c. To declare a destructor, you must use a dash - followed by the class name.

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d. You cannot provide any arguments to a destructor.

ANSWER: FEEDBACK:

d

a. Incorrect. A destructor contains the actions you require when an instance of a class is destroyed. b. Incorrect. A destructor can be explicitly created, but it doesn't have to be. If you do not explicitly create a destructor for a class, C# automatically provides one. c. Incorrect. To explicitly declare a destructor, you use an identifier that consists of a tilde ( ~ ) followed by the class name. d. Correct. You cannot provide any arguments when you call a destructor. It must have an empty parameter list.

POINTS: 1 REFERENCES: Understanding Destructors QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.11 - Write destructors DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:20 AM

28. A member of a class that provides access to a field of a class is referred to as what? a. implicit parameter b. property c. explicit parameter d. reference type ANSWER: FEEDBACK:

b

a. Incorrect. An implicit parameter is undeclared and gets its value automatically. It does not allow access to a field of a class. b. Correct. A property is a member of a class that provides access to a field of a class; properties define how fields will be set and retrieved. c. Incorrect. An explicit parameter does not provide access to a field of a class.

d. Incorrect. A reference type is a data type that holds a memory address.

POINTS: 1 REFERENCES: Creating Properties QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.04 - Create properties, including auto-implemented properties DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 3:59 PM

29. What kind of property is one in which the code within the accessors is created automatically? a. auto-implemented property b. polymorphic property c. dynamic property d. abstract property ANSWER:

a

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a. Correct. An auto-implemented property is one in which the code within the accessors is created automatically. The only action in the set accessor is to assign a value to the associated field, and the only action in the get accessor is to return the associated field value. b. Incorrect. Polymorphic is not a property in which the code within the accessors are created automatically. c. Incorrect. Dynamic is not a property in which the code within the accessors are created automatically. d. Incorrect. Abstract is not a property in which the code within the accessors are created automatically.

POINTS: 1 REFERENCES: Creating Properties QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.04 - Create properties, including auto-implemented properties DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:21 AM

30. Even though you can't specify this modifier for a named constant within a class, what is the effective access modifier for the constant? a. public b. private c. static d. internal ANSWER: FEEDBACK:

c

a. Incorrect. The public class access modifier means access to the class is not limited. b. Incorrect. The private class access modifier means access is limited to another class to which the class belongs. In other words, a class can be private if it is contained within another class, and only the containing class should have access to the private class.

c. Correct. When you define a named constant within a class, it is always static, even though you cannot use the keyword static as a modifier. d. Incorrect. The internal class access modifier means access is limited to the assembly to which the class belongs.

POINTS: 1 REFERENCES: More About public and private Access Modifiers QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.05 - Use public and private access modifiers DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/20/2019 9:22 AM

Match each item with a statement below.

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a. class client b. class header c. reference type d. set accessor e. get accessor f. contextual keywords g. constructor initializer h. default constructor i. default value j. readonly property REFERENCES: Glossary QUESTION TYPE: Matching HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.09.01 - Describe class concepts MVC#.FARR.18.09.02 - Create classes from which objects can be instantiated MVC#.FARR.18.09.03 - Create objects MVC#.FARR.18.09.04 - Create properties, including auto-implemented properties MVC#.FARR.18.09.07 - Write and use constructors DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/18/2019 11:43 AM

31. A program or class that instantiates objects of another prewritten class.

ANSWER: a POINTS: 1

32. A definition containing an optional access modifier, the keyword class, and an identifier.

ANSWER: b POINTS: 1

33. A type that refers to a specific memory location.

ANSWER: c POINTS: 1

34. This allows assignment of values to fields using a property name.

ANSWER: d POINTS: 1

35. This retrieves an object's field values.

ANSWER: e POINTS: 1

36. Identifiers that act like keywords in specific circumstances.

ANSWER: f POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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37. An alternative to repeating code in the constructors.

ANSWER: g POINTS: 1

38. An automatically generated constructor for a class.

ANSWER: h POINTS: 1

39. The value of an object initialized with a default constructor.

ANSWER: i POINTS: 1

40. A property that has only a get accessor, and no set accessor.

ANSWER: j POINTS: 1

41. What are the three parts of a class definition in C#?

ANSWER: A class header (or class definition) contains three parts: 1. An optional access modifier 2. The keyword class 3. Any legal identifier you choose for the name of your class POINTS: 1 REFERENCES: Creating a Class from Which Objects Can Be Instantiated QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.09.02 - Create classes from which objects can be instantiated DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/18/2019 11:44 AM

42. What are the class access modifiers in C#?

ANSWER: You can declare a class to be one of the following: * public, meaning access to the class is not limited * protected, meaning access to the class is limited to the class and to any classes derived from the class * internal, meaning access is limited to the assembly (a group of code modules compiled together) to which the class belongs * private, meaning access is limited to another class to which the class belongs (In other words, a class can be private if it is contained within another class, and only the containing class should have access to the private class.)

POINTS: 1 REFERENCES: Creating a Class from Which Objects Can Be Instantiated QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic Copyright Cengage Learning. Powered by Cognero.

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LEARNING OBJECTIVES: MVC#.FARR.18.09.02 - Create classes from which objects can be instantiated DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/18/2019 11:44 AM

43. Briefly explain how to create instance variables, and show how to define a private integer instance variable called idNumber within a class called Employee.

ANSWER: When you create a class, you declare the class's instance variables, which are its attributes or fields, within the curly braces using the same syntax you use to declare other variables-you provide a type and an identifier. For example, within an Employee class, you might declare an integer ID number. Then, when you create Employee objects, each will have its own idNumber. The definition of this instance variable is shown below: class Employee { private int idNumber; } POINTS: 1 REFERENCES: Creating a Class from Which Objects Can Be Instantiated QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.09.02 - Create classes from which objects can be instantiated DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/18/2019 11:47 AM

44. Creating an object requires two steps that are shown in the example below: Employee myAssistant; myAssistant = new Employee(); What do these statements accomplish?

ANSWER: Defining an Employee object named myAssistant requires two steps-you must declare a reference to the object, and then you must actually set aside enough memory to hold the object. When you declare the myAssistant instance of the Employee class (as in the first statement), you are notifying the compiler that you will use the identifier myAssistant. However, you are not yet setting aside computer memory in which the object named myAssistant can be stored. To allocate the needed memory and instantiate the object, you must use the new operator (as in the second statement).

POINTS: 1 REFERENCES: Creating Objects QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.09.03 - Create objects DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/18/2019 11:50 AM Copyright Cengage Learning. Powered by Cognero.

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45. Like any other C# method, constructors can be overloaded. Show how to create two public constructorsone with no parameters, and one with a parameter called sal-that both set the value for the property Salary within the following class: class Employee { public double Salary; } ANSWER: class Employee { public double Salary; public Employee() { Salary = 0; } public Employee(double sal) { Salary = sal; } } POINTS: 1 REFERENCES: Understanding Constructors QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.09.07 - Write and use constructors DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/18/2019 11:51 AM

46. Briefly describe what an object initializer does and give a specific example. When is the object initializer assignment made?

ANSWER: An object initializer allows you to assign values to any accessible members or properties of a class at the time of instantiation without calling a constructor with parameters. For example, assuming an Employee class has been created with a public IdNumber property and a parameterless constructor, you can write an object initializer as follows: Employee aWorker = new Employee {IdNumber = 101}; In this statement, 101 is assigned to the aWorker object's IdNumber property. The assignment is made within a pair of curly braces; no parentheses are used with the class name. When this statement executes, the parameterless, default constructor for the class is executed first, and then the object initializer assignment is made.

POINTS: 1 REFERENCES: Understanding Constructors QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic Copyright Cengage Learning. Powered by Cognero.

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LEARNING OBJECTIVES: MVC#.FARR.18.09.08 - Use object initializers DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/18/2019 11:51 AM

47. Write an example method that overrides the + operator to create a new book whose title is a concatenation of the titles of two books. For example, if the first book's title is "The Adventures of Tom Sawyer" and the second book's title is "The Adventures of Huckleberry Finn", the concatenated title will be "The Adventures of Tom Sawyer and The Adventures of Huckleberry Finn". Assume the book class is defined as: class Book { public Book(string title) { Title = title; } public string Title {get; set;} } ANSWER: The overwritten method should be similar to the operator+ method shown below. It must be declared as static, take two Book parameters, and provide some mechanism for concatenating the titles of the two books. public static Book operator+(Book first, Book second) { string newTitle = first.Title + " and " + second.Title; return(new Book(newTitle)); } POINTS: 1 REFERENCES: Overloading Operators QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.09.09 - Overload operators DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/18/2019 11:52 AM

48. The Sort() method accepts an array as a parameter and arranges its elements in descending order. What complication arises when you sort an array of objects? Explain how to use the IComparable interface to address this problem.

ANSWER: A complication arises when you consider sorting arrays of objects you create. When you create a class in which comparisons will be made between objects, you must tell the compiler which field to use when making those comparisons. C# contains an IComparable interface, which contains the definition for the CompareTo() method that compares one object to another and returns an integer. The CompareTo() method accepts a parameter object, but does not contain any statements; you must provide an implementation for this method in classes you create if you want the objects to be comparable. In other words, you must determine the meanings of greater than, less than, and equal to for the class.

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POINTS: 1 REFERENCES: Declaring an Array of Objects QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.09.10 - Declare object arrays and use methods with them DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/18/2019 11:53 AM

49. What is the difference between overriding a method and overloading a method with respect to method signatures?

ANSWER: When a method overrides another, it has the same signature as the method it overrides. When methods are overloaded, they have different signatures.

POINTS: 1 REFERENCES: Declaring an Array of Objects QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.09.09 - Overload operators DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 3:59 PM

50. Explain what a destructor is and why it cannot be overloaded.

ANSWER: A destructor contains the actions you require when an instance of a class is destroyed.

Most often, an instance of a class is destroyed when it goes out of scope. As with constructors, if you do not explicitly create a destructor for a class, C# automatically provides one.

To explicitly declare a destructor, you use an identifier that consists of a tilde (˜) followed by the class name. You cannot provide any parameters to a destructor; it must have an empty argument list. As a consequence, destructors cannot be overloaded; a class can have one destructor at most.

POINTS: 1 REFERENCES: Understanding Destructors QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.09.11 - Write destructors DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 3:59 PM

1. A superclass contains all the fields and methods of its subclasses as well as its own more specific fields and methods. a. True Copyright Cengage Learning. Powered by Cognero.

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b. False ANSWER: FEEDBACK:

False Correct

Correct. Any subclass contains all the fields, properties, and methods of its superclass as well as its own more specific ones.

Incorrect Incorrect. Any subclass contains all the fields, properties, and methods of its superclass as well as its own more specific ones.

POINTS: 1 REFERENCES: Understanding Inheritance QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.01 - Describe inheritance DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

2. When you use information hiding by selecting which properties and methods of a class to make public, you are assured that your data will be altered only by the properties and methods you choose and only in ways that you can control. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. When you use information hiding, you are assured that your data will be altered only by the properties and methods you choose and only in ways that you can control.

Incorrect Incorrect. When you use information hiding, you are assured that your data will be altered only by the properties and methods you choose and only in ways that you can control.

POINTS: 1 REFERENCES: Using the protected Access Specifier QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.03 - Use the protected access specifier DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

3. If a base class and a derived class have methods with the same names but different parameter lists, the derived class method overrides the base class method. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. If a base class and a derived class have methods with the same names but different parameter lists, then the derived class method does not override the base class method; instead, it overloads the base class method.

Incorrect Incorrect. If a base class and a derived class have methods with the same names but different parameter lists, then the derived class method does not override the base class method; instead, it overloads the base class method.

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POINTS: 1 REFERENCES: Overriding Base Class Members QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.04 - Override base class members DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

4. A class's ToString() method is often a useful debugging aid. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. A class’s ToString() method is often a useful debugging aid.

Incorrect Incorrect. A class’s ToString() method is often a useful debugging aid.

POINTS: 1 REFERENCES: Using the Object Class QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.06 - Understand the Object class DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

5. The Equals() method compares two objects and returns true if they have the same value. a. True b. False ANSWER: FEEDBACK:

False Correct. The Equals() method returns true if two objects have the same memory address—that is, if one object is a reference to the other and both are literally the same object.

Incorrect Incorrect. The Equals() method returns true if two objects have the same memory address—that is, if one object is a reference to the other and both are literally the same object.

Correct

POINTS: 1 REFERENCES: Using the Object Class QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.06 - Understand the Object class DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

6. A class that is used as the basis for inheritance is known as what type of class? a. child class b. extended class Copyright Cengage Learning. Powered by Cognero.

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c. base class d. subclass ANSWER: FEEDBACK:

c

a. Incorrect. A child class is a derived class, which is one that has inherited from a base class. b. Incorrect. An extended class is one that has inherited from a base class.

c. Correct. A base class is a class that is used as a basis for inheritance. d. Incorrect. A subclass is a derived class, which is one that has inherited from a base class.

POINTS: 1 REFERENCES: Understanding Inheritance QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.01 - Describe inheritance DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

7. When a class inherits from a base class, it is known as what type of class? a. base class b. derived class c. superclass d. parent class ANSWER: FEEDBACK:

b

a. Incorrect. A base class is a class that is used as a basis for inheritance. b. Correct. A derived class or extended class is one that has inherited from a base class. c. Incorrect. A superclass is a base class.

d. Incorrect. A parent class is a base class.

POINTS: 1 REFERENCES: Understanding Inheritance QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.01 - Describe inheritance DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

8. When presented with two classes that have a parent-child relationship, you can tell which class is the base class and which is the derived class by using the two classes in a sentence using what phrase? a. "is a" b. "in a" c. "of a" d. "uses a" ANSWER:

a

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a. Correct. Every derived class object "is a" specific instance of both the derived class and the base class. Therefore, you can assign a derived class object to an object of any of its base class types. b. Incorrect. Using "in a" in a sentence is not how you can tell which class is the base class and which is the derived class. c. Incorrect. Using "of a" in a sentence is not how you can tell which class is the base class and which is the derived class. d. Incorrect. Using "uses a" in a sentence is not how you can tell which class is the base class and which is the derived class.

POINTS: 1 REFERENCES: Understanding Inheritance QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.01 - Describe inheritance DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

9. What term is synonymous with a derived class? a. parent class b. superclass c. base class d. subclass ANSWER: FEEDBACK:

d

a. Incorrect. A parent class is a base class. b. Incorrect. A superclass is a base class. c. Incorrect. A base class is a class that is used as a basis for inheritance, which is not a derived class. d. Correct. A subclass is a derived class.

POINTS: 1 REFERENCES: Understanding Inheritance QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.01 - Describe inheritance DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

10. What is another name for a base class in C#? a. derived class b. parent class c. extended class d. child class ANSWER: FEEDBACK:

b

a. Incorrect. A derived class is one that has inherited from a base class.

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b. Correct. A parent class is a base class. c. Incorrect. An extended class is one that has inherited from a base class. d. Incorrect. A child class is a derived class.

POINTS: 1 REFERENCES: Understanding Inheritance QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.01 - Describe inheritance DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

11. What is another name for a derived class in the C# programming language? a. parent class b. second class c. base class d. child class ANSWER: FEEDBACK:

d

a. Incorrect. A parent class is a base class. b. Incorrect. There are no second classes. c. Incorrect. A base class is a class that is used as a basis for inheritance, which is not a derived class. d. Correct. A child class is a derived class.

POINTS: 1 REFERENCES: Understanding Inheritance QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.01 - Describe inheritance DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

12. What kind of data field or method can be used within its own class or in any classes extended from that class, but cannot be used by "outside" classes? a. protected b. public c. private d. internal ANSWER: FEEDBACK:

a

a. Correct. Protected access provides an intermediate level of security between public and private access. A protected data field or method can be used within its own class or in any classes extended from that class, but it cannot be used by ―outside‖ classes. b. Incorrect. Public access is a level of method accessibility that allows unlimited access to a method by any class.

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c. Incorrect. Private access is a level of method accessibility that limits method access to the containing class. d. Incorrect. Internal access is limited to the assembly to which the class belongs.

POINTS: 1 REFERENCES: Using the protected Access Specifier QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.03 - Use the protected access specifier DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

13. What kind of a class might be considered to be "fragile"? a. A built in class that is overloaded. b. A class that depends on being passed parameters from another method. c. A class that depends on field names from parent classes. d. A class that has no destructor method.

ANSWER: FEEDBACK:

c

a. Incorrect. A built in class that is overloaded is not considered to be "fragile." b. Incorrect. A class that depends on being passed parameters from another method is not considered to be "fragile." c. Correct. Classes that depend on field names from parent classes are said to be fragile because they are prone to errors—that is, they are easy to ―break.‖ d. Incorrect. A class that has no destructor method is not considered to be "fragile."

POINTS: 1 REFERENCES: Using the protected Access Specifier QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.03 - Use the protected access specifier DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

14. What happens when you declare a property defined in a base class as override in a derived class? a. The new declaration is eliminated in favor of the old declaration. b. The new declaration removes the old declaration at compile time. c. The new declaration is used when the compiler deems it appropriate. d. The new declaration overrides and hides its counterpart in the parent class.

ANSWER: FEEDBACK:

d

a. Incorrect. When you declare a property defined in a base class as override in a derived class, the new declaration is not eliminated in favor of the old declaration. b. Incorrect. When you declare a property defined in a base class as override in a derived class, the new declaration does not remove the old declaration at compile time. c. Incorrect. When you declare a property defined in a base class as override in a derived class, the new declaration is not used when the compiler deems it

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appropriate. d. Correct. When you declare a property defined in a base class as override in a derived class, the new declaration overrides and hides its counterpart in the parent class.

POINTS: 1 REFERENCES: Overriding Base Class Members QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.04 - Override base class members DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

15. Besides the new keyword, what keyword can you use when defining a derived class member that has the same name as a base class member? a. cast b. hide c. override d. overload ANSWER: FEEDBACK:

c

a. Incorrect. The word cast is not a keyword. b. Incorrect. The word hide is not a keyword. c. Correct. When you create a derived class that inherits an abstract method from a parent, you must use the keyword override in the method header and provide the actions, or implementation, for the inherited method within the derived class. d. Incorrect. The word overload is not a keyword.

POINTS: 1 REFERENCES: Overriding Base Class Members QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.04 - Override base class members DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

16. What happens to a base class member in a derived class that is not hidden by the derived class? a. It is overridden by the derived class. b. It is removed from the derived class. c. It will be visible to the derived class. d. It will be eliminated from the derived class.

ANSWER: FEEDBACK:

c

a. Incorrect. A base class member in a derived class that is not hidden by the derived class is not overridden by the derived class. b. Incorrect. A base class member in a derived class that is not hidden by the derived class is not removed from the derived class.

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c. Correct. A base class member that is not hidden by the derived class is visible in the derived class. d. Incorrect. A base class member in a derived class that is not hidden by the derived class is not eliminated from the derived class.

POINTS: 1 REFERENCES: Overriding Base Class Members QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.04 - Override base class members DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

17. When using a derived class that contains a method that overrides a parent class method, what keyword can you use to access the parent class method from within the derived class? a. base b. super c. upper d. parent ANSWER: FEEDBACK:

a

a. Correct. When a derived class contains a method or property that overrides a parent class method or property, you might have occasion to use the parent class version within the subclass. If so, you can use the keyword base to access the parent class method or property. b. Incorrect. The word super is not a keyword.

c. Incorrect. The word upper is not a keyword. d. Incorrect. The word parent is not a keyword.

POINTS: 1 REFERENCES: Overriding Base Class Members QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.04 - Override base class members DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

18. You can assign a derived class object to an object of any of its superclass types. When you do, what type of conversion occurs from the derived class to base class? a. explicit b. implicit c. real d. strong ANSWER: FEEDBACK:

b

a. Incorrect. An explicit conversion is not the type of conversion that occurs from the derived class to the base class.

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b. Correct. An implicit reference conversion occurs when a derived class object is assigned to its ancestor’s data type. c. Incorrect. Real is not a conversion type.

d. Incorrect. Strong is not a conversion type.

POINTS: 1 REFERENCES: Understanding Implicit Reference Conversions QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.05 - Describe how a derived class object "is an" instance of the base class DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

19. In C#, any class you create is derived from what single built-in class? a. System.Console b. System.Object c. System.Class d. Object.System ANSWER: FEEDBACK:

b

a. Incorrect. Any class you create is not derived from the System.Console class. b. Correct. Every class you create in C# derives from a single class named System.Object.

c. Incorrect. System.Class is not a built-in class. d. Incorrect. Object.System is not a built-in class.

POINTS: 1 REFERENCES: Using the Object Class QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.06 - Understand the Object class DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

20. What keyword is an alias for the System.Object class? a. object b. base c. super d. parent ANSWER: FEEDBACK:

a

a. Correct. The keyword object is an alias for the System.Object class. b. Incorrect. When a derived class contains a method or property that overrides a parent class method or property, you might have occasion to use the parent class

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version within the subclass. If so, you can use the keyword base to access the parent class method or property. c. Incorrect. The word super is not a keyword.

d. Incorrect. The word parent is not a keyword.

POINTS: 1 REFERENCES: Using the Object Class QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.06 - Understand the Object class DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

21. What object class method returns a string that holds the name of the class, just as GetType() does? a. GetHashCode() b. Equals() c. GetName() d. ToString() ANSWER: FEEDBACK:

d

a. Incorrect. GetHashCode() gets a unique code for each object, and it is useful in certain sorting and data management tasks. b. Incorrect. Equals() determines whether two Object instances are equal.

c. Incorrect. GetName() is not an object class method. d. Correct. ToString() returns a String that represents the object.

POINTS: 1 REFERENCES: Using the Object Class QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.06 - Understand the Object class DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

22. What can be used as a type of "fingerprint" for an object, due to the fact that it is unique? a. property b. hash code c. derived code d. new property ANSWER: FEEDBACK:

b

a. Incorrect. A property is a field in an object. b. Correct. A hash code is sometimes called a "fingerprint" for an object because it uniquely identifies the object.

c. Incorrect. Derived code is not related "fingerprint." d. Incorrect. New property is not related to "fingerprint."

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POINTS: 1 REFERENCES: Using the Object Class QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.06 - Understand the Object class DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

23. What keyword always refers to the superclass of the class in which you use it? a. super b. parent c. upper d. base ANSWER: FEEDBACK:

d

a. Incorrect. The word super is not a keyword. b. Incorrect. The word parent is not a keyword. c. Incorrect. The word upper is not a keyword. d. Correct. The keyword base always refers to the superclass of the class in which you use it.

POINTS: 1 REFERENCES: Understanding Inheritance QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.01 - Describe inheritance DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

24. What type of class is one from which you cannot create concrete objects, but from which you can inherit? a. abstract b. concrete c. base d. derived ANSWER: FEEDBACK:

a

a. Correct. An abstract class is one from which you cannot create concrete objects but from which you can inherit. b. Incorrect. A concrete class is a nonabstract class from which objects can be instantiated. c. Incorrect. A base class is a class that is used as a basis for inheritance.

d. Incorrect. A derived class or extended class is one that has inherited from a base class.

POINTS: REFERENCES: QUESTION TYPE:

1 Creating and Using Abstract Classes Multiple Choice

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HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.08 - Create and use abstract classes DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

25. What type of method has no method statements, and requires the use of an override statement for any class derived from a class that contains it? a. concrete b. overloaded c. abstract d. overridden ANSWER: FEEDBACK:

c

a. Incorrect. A class that is used to instantiate objects is a concrete class. b. Incorrect. Overloading is using one term to indicate diverse meanings. In C#, methods are overloaded when there are multiple versions with the same name but different parameter lists. c. Correct. An abstract method has no method statements. Any class derived from a class that contains an abstract method must override the abstract method by providing a body (an implementation) for it. d. Incorrect. To override a method is to take precedence over another method version.

POINTS: 1 REFERENCES: Creating and Using Abstract Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.08 - Create and use abstract classes DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

26. A class that is able to inherit from more than one class utilizes what C# feature? a. polymorphism b. interfacing c. collaboration d. multiple inheritance ANSWER: FEEDBACK:

d

a. Incorrect. Polymorphism is the ability to create methods that act appropriately depending on the context. b. Incorrect. An interface is a collection of abstract methods (and perhaps other members) that can be used by any class as long as the class provides a definition to override the interface's abstract definitions. c. Incorrect. Collaboration is not a feature of C#.

d. Correct. Multiple inheritance is the ability to inherit from more than one class.

POINTS: REFERENCES:

1 Creating and Using Interfaces

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QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.09 - Create and use interfaces DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

27. System.Console is an example of a class that can't be extended. What is the reason for this? a. The class has a private access modifier. b. The class has an internal access modifier. c. The class has a static access modifier. d. The class has a protected access modifier.

ANSWER: FEEDBACK:

c

a. Incorrect. Private access is a level of method accessibility that limits method access to the containing class. b. Incorrect. Internal access is limited to the assembly to which the class belongs.

c. Correct. Classes that are not intended to be instantiated and that contain only static members are declared as static classes. You cannot extend static classes. d. Incorrect. Protected access provides an intermediate level of security between public and private access. A protected data field or method can be used within its own class or in any classes extended from that class, but it cannot be used by ―outside‖ classes.

POINTS: 1 REFERENCES: Recognizing Inheritance in GUI Applications QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.11 - Recognize inheritance in GUI applications DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

28. In the event that a method that should be overridden in a child class has its own implementation, what should you declare the base class method to be? a. abstract b. virtual c. valid d. static ANSWER: FEEDBACK:

b

a. Incorrect. An abstract class is one from which you cannot create concrete objects but from which you can inherit. b. Correct. A virtual method is one whose behavior is determined by the implementation in a child class. c. Incorrect. The word valid is not a C# keyword. d. Incorrect. Classes that are not intended to be instantiated and that contain

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only static members are declared as static classes. You cannot extend static classes.

POINTS: 1 REFERENCES: Creating and Using Abstract Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.04 - Override base class members DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

29. What method can you use to return a unique hash for different objects, so long as you explicitly implement it in a derived class? a. CalcHash() b. GetHashGen() c. ToHash() d. GetHashCode() ANSWER: FEEDBACK:

d

a. Incorrect. CalcHash() is not a built-in method. b. Incorrect. GetHashGen() is not a built-in method. c. Incorrect. ToHash() is not a built-in method. d. Correct. GetHashCode() gets a unique code for each object. It is useful in certain sorting and data management tasks.

POINTS: 1 REFERENCES: Using the Object Class QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.06 - Understand the Object class DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

30. What statement regarding the use of the Object class and classes in general is accurate? a. When you create any child class, no inheritance occurs automatically. b. All classes inherit the Object class methods. c. The object class contains a constructor, destructor, and two public instance methods. d. Although every class descends from Object, not all objects are Objects.

ANSWER: FEEDBACK:

b

a. Incorrect. When you create a class such as Employee, you usually use the header class Employee, which implicitly, or automatically, descends from the Object class. b. Correct. Because all classes inherit from the Object class, all classes inherit the Object class methods. c. Incorrect. The Object class contains a constructor, a destructor, and four

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public instance methods d. Incorrect. Because every class descends from Object, every object ―is an‖ Object.

POINTS: 1 REFERENCES: Using the Object Class QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.06 - Understand the Object class DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

Match each item with a statement below. a. extended class b. superclass c. protected members d. polymorphism e. System.Object f. GetType() g. reference equality h. Equals() i. sealed class j. extension methods REFERENCES: Glossary QUESTION TYPE: Matching HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.10.01 - Describe inheritance MVC#.FARR.18.10.02 - Extend classes MVC#.FARR.18.10.03 - Use the protected access specifier MVC#.FARR.18.10.04 - Override base class members MVC#.FARR.18.10.06 - Understand the Object class MVC#.FARR.18.10.10 - Use extension methods DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

31. A class that has inherited from a base class, also known as a derived class.

ANSWER: a POINTS: 1

32. A synonym for base class.

ANSWER: b POINTS: 1

33. Can be used by a class and its descendants.

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POINTS: 1

34. Using the same method name to indicate different implementations.

ANSWER: d POINTS: 1

35. The ultimate base class for all other types.

ANSWER: e POINTS: 1

36. Returns a string containing an object's class.

ANSWER: f POINTS: 1

37. Occurs when two reference type objects refer to the same object.

ANSWER: g POINTS: 1

38. Returns true if two Objects have the same memory address.

ANSWER: h POINTS: 1

39. A class that cannot be extended.

ANSWER: i POINTS: 1

40. Static methods that act like instance methods.

ANSWER: j POINTS: 1

41. Show an example of a class definition that creates a subclass of an existing Employee class, and adds a private double field called commissionRate. What is the total set of fields that an instance of the new class contains?

ANSWER: The class definition provided should be similar to the following: class CommissionEmployee : Employee { private double commissionRate; } Each CommissionEmployee object automatically contains the data fields of the base class (Employee in this case) plus any new fields that are added (commissionRate in this case).

POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Working with Base Class Constructors Subjective Short Answer False

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STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.10.02 - Extend classes DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

42. On some occasions, you might want to access parent class data from a child class. Declaring the parent class field as public would violate the principle of information hiding, but declaring it private would make it inaccessible. How can the proper level of security be achieved?

ANSWER: If you want a derived class property or method to be able to access a parent's field, then it cannot be private. However, if you don't want other, nonchild classes to access the field, then it cannot be public. The solution is to create the field using the modifier protected, which provides you with an intermediate level of security between public and private access. A protected data field or method can be used within its own class or in any classes extended from that class, but it cannot be used by "outside" classes. In other words, protected members can be used "within the family"-by a class and its descendants.

POINTS: 1 REFERENCES: Using the protected Access Specifier QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.10.03 - Use the protected access specifier DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

43. When a derived class contains a method or property that overrides a parent class method or property, how can you use the parent class version from within the subclass? Show an example of a derived class that overrides a parent class method, but then uses the parent class method.

ANSWER: When a derived class contains a method or property that overrides a parent class method or property, you might have occasion to use the parent class version within the subclass. If so, you can use the keyword base to access the parent class method or property. For example: class CommissionEmployee : Employee { new public string GetGreeting() { string greeting = base.GetGreeting(); greeting += "\nI work on commission."; return greeting; } } POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Overriding Base Class Members Subjective Short Answer False

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STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.10.04 - Override base class members DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

44. Briefly describe the four public instance methods of the Object class.

ANSWER: The Object class contains a constructor, a destructor, and four public instance methods, as summarized below: Equals() Determines whether two Object instances are equal GetHashCode() Gets a unique code for each object; useful in certain sorting and data management tasks GetType() Returns the type, or class, of an object ToString() Returns a string that represents the object POINTS: 1 REFERENCES: Using the Object Class QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.10.06 - Understand the Object class DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

45. What are the requirements for overloading the Object class's Equals() method?

ANSWER: If you overload the Equals() method, it should meet the following requirements by convention: * Its header should be as follows (you can use any identifier for the Object parameter): public override bool Equals(Object o) * It should return false if the argument is null. * It should return true if an object is compared to itself. * It should return true only if both of the following are true: oneObject.Equals(anotherObject) anotherObject.Equals(oneObject) * If oneObject.Equals(anotherObject) returns true and oneObject.Equals(aThirdObject) returns true, then anotherObject.Equals(aThirdObject) should also be true.

POINTS: 1 REFERENCES: Using the Object Class QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.10.06 - Understand the Object class DATE CREATED: 5/16/2017 12:58 PM Copyright Cengage Learning. Powered by Cognero.

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46. Explain the sequence of constructors that will be called when you create an object that is an instance of a derived class.

ANSWER: When you create any object, you are calling a class constructor method that has the same name as the class itself. For example: SomeClass anObject = new SomeClass(); When you instantiate an object that is a member of a derived class, you call both the constructor for the base class and the constructor for the extended, derived class.

When you create any derived class object, the base class constructor must execute first; only then does the derived class constructor execute. When you create any object, you always implicitly call the Object constructor because all classes are derived from Object. So, when you create a base class and a derived class, and instantiate a derived class object, you call three constructors: one from the Object class, one from the base class, and one from the derived class.

POINTS: 1 REFERENCES: Working with Base Class Constructors QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.10.07 - Work with base class constructors DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

47. When all base class constructors require arguments, you must include a constructor for each derived class you create. Why? ANSWER: When a base class constructor requires arguments, you must include a constructor for each derived class you create. Your derived class constructor can contain any number of statements; however, within the header of the constructor, you must provide values for any arguments required by the base class constructor. Even if you have no other reason for creating a derived class constructor, you must write the derived class constructor so it can call its parent's constructor.

POINTS: 1 REFERENCES: Working with Base Class Constructors QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.10.07 - Work with base class constructors DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

48. The ability to inherit from more than one class is called multiple inheritance. C# prohibits multiple inheritance, but it does provide an alternative mechanism. Why is multiple inheritance prohibited, and what is the alternative that is provided?

ANSWER: Multiple inheritance is a difficult concept, and programmers encounter many Copyright Cengage Learning. Powered by Cognero.

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problems when they use it. For example, variables and methods in the parent classes may have identical names, creating a conflict when the child class uses one of the names. Additionally, a child class constructor must call its parent class constructor.

When two or more parents exist, this becomes a more complicated task: To which class should base refer when a child class has multiple parents?

For all these reasons, multiple inheritance is prohibited in C#. However, C# does provide an alternative to multiple inheritance, known as an interface. Much like an abstract class, an interface is a collection of methods (and perhaps other members) that can be used by any class as long as the class provides a definition to override the interface's abstract definitions.

POINTS: 1 REFERENCES: Creating and Using Interfaces QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.10.09 - Create and use interfaces DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

49. Briefly describe the similarities and differences between abstract classes and interfaces.

ANSWER: Abstract classes and interfaces are similar in that you cannot instantiate concrete objects from either one. Abstract classes differ from interfaces in that abstract classes can contain nonabstract methods, but all methods within an interface must be abstract. A class can inherit from only one base class (whether abstract or not), but it can implement any number of interfaces.

POINTS: 1 REFERENCES: Creating and Using Interfaces QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.10.09 - Create and use interfaces DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

50. Reusing existing classes and interfaces makes the job of programming easier. What are some of the future advantages that come from writing extendable base classes?

ANSWER: When you create a useful, extendable base class, you and other future programmers gain several advantages: * Derived class creators save development time because much of the code that is needed for the class already has been written. * Derived class creators save testing time because the base class code already has been tested and probably used in a variety of situations. In other words, the base class code is reliable. * Programmers who create or use new derived classes already understand how the base class works, so the time it takes to learn the new class features is reduced.

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* When you create a derived class in C#, the base class source code is not changed.

Thus, the base class maintains its integrity.

POINTS: 1 REFERENCES: Recognizing Inheritance in GUI Applications QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.10.11 - Recognize inheritance in GUI applications DATE CREATED: 5/16/2017 12:58 PM DATE MODIFIED: 11/15/2019 4:00 PM

1. C# has more than 100 defined Exception subclasses. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. C# has more than 100 defined Exception subclasses.

Incorrect Incorrect. C# has more than 100 defined Exception subclasses.

POINTS: 1 REFERENCES: Understanding Exceptions QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.01 - Describe exceptions, the Exception class, and SystemExceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

2. Errors you discover when compiling a program are considered to be exceptions. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. Errors you discover when compiling a program are not exceptions; they are syntax or compiler errors.

Incorrect Incorrect. Errors you discover when compiling a program are not exceptions; they are syntax or compiler errors.

POINTS: 1 REFERENCES: Understanding Exceptions QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.01 - Describe exceptions, the Exception class, and SystemExceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

3. You can deliberately generate a SystemException by forcing a program to contain an error.

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a. True b. False ANSWER: FEEDBACK:

True Correct. You can deliberately generate a SystemException by forcing a program to contain an error. As an example, in every programming language, it is illegal to divide an integer by zero because the operation is mathematically undefined.

Incorrect Incorrect. You can deliberately generate a SystemException by forcing a program to contain an error. As an example, in every programming language, it is illegal to divide an integer by zero because the operation is mathematically undefined.

Correct

POINTS: 1 REFERENCES: Understanding Exceptions QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.01 - Describe exceptions, the Exception class, and SystemExceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

4. You can place any number of statements in a try block, including those you know will never throw an exception. a. True b. False ANSWER: FEEDBACK:

True Correct. You can place any number of statements in a try block, including those you know will never throw an exception.

Incorrect Incorrect. You can place any number of statements in a try block, including those you know will never throw an exception.

Correct

POINTS: 1 REFERENCES: Comparing Traditional and Object-Oriented Error-Handling Methods QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.02 - Compare traditional and object-oriented error-handling methods DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

5. If you are working on a professional project, Microsoft recommends that you use the general Exception class in a catch block. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. Many programmers recommend that you never use the general Exception class in a catch block in a professional program because doing so can hide problems, but in your own programs, you might want to do so for

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simplicity.

Incorrect Incorrect. Many programmers recommend that you never use the general Exception class in a catch block in a professional program because doing so can hide problems, but in your own programs, you might want to do so for simplicity.

POINTS: 1 REFERENCES: Comparing Traditional and Object-Oriented Error-Handling Methods QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.02 - Compare traditional and object-oriented error-handling methods DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

6. In C#, all exceptions are objects that are members or derived members of what specific class? a. ApplicationException b. Exception c. SystemException d. RuntimeException ANSWER: FEEDBACK:

b

a. Incorrect. User-defined application exception classes are derived from ApplicationException. b. Correct. In C#, all exceptions are objects that are instances of the Exception class or one of its derived classes. c. Incorrect. The predefined Common Language Runtime exception classes are derived from SystemException.

d. Incorrect. RuntimeException is not a built-in class in C#.

POINTS: 1 REFERENCES: Understanding Exceptions QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.01 - Describe exceptions, the Exception class, and SystemExceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

7. All classes in the C# programming language, including the Exception class, are descendants of what built in class? a. System b. Application c. CLR d. Object ANSWER: FEEDBACK:

d

a. Incorrect. All classes are not descendants of the System class.

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b. Incorrect. Applicationis not a built-in class in C#. c. Incorrect. CLR is not a built-in class in C#. d. Correct. Like all other classes in the C# programming language, the Exception class is a descendant of the Object class.

POINTS: 1 REFERENCES: Understanding Exceptions QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.01 - Describe exceptions, the Exception class, and SystemExceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

8. An exception belonging to what specific class is thrown when an attempt is made to store an element of the wrong type within an array? a. System.ArrayTypeMismatchException b. System.TypeMismatch c. System.FormatException d. System.InvalidCastException ANSWER: FEEDBACK:

a

a. Correct. System.ArrayTypeMismatchException is thrown when an attempt is made to store an element of the wrong type within an array. b. Incorrect. System.TypeMismatch is not a built-in class in C#.

c. Incorrect. System.FormatException is thrown when the format of an argument does not meet the parameter specification of the invoked method. d. Incorrect. System.InvalidCastException is thrown for an invalid casting or explicit conversion.

POINTS: 1 REFERENCES: Understanding Exceptions QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.01 - Describe exceptions, the Exception class, and SystemExceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

9. An exception of the ____ class is thrown when an ongoing operation is aborted by the user. a. System.InvalidOperationException b. System.ArithmeticException c. System.Data.OperationAbortedException d. System.InvalidCastException ANSWER: FEEDBACK:

c

a. Incorrect. System.InvlaidOperationException is thrown when a method call is invalid for the object's current state.

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b. Incorrect. System.ArithmeticException is thrown for errors in an arithmetic, casting, or conversion operation. c. Correct. System.Data.OperationAbortedException is thrown when an ongoing operation is aborted by the user. d. Incorrect. System.InvalidCastException is thrown for an invalid casting or explicit conversion.

POINTS: 1 REFERENCES: Understanding Exceptions QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.01 - Describe exceptions, the Exception class, and SystemExceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

10. What represents the degree to which a system is resilient to stress and able to maintain correct functioning? a. fault tolerance b. critical functionality c. load forgiveness d. system robustness ANSWER: FEEDBACK:

d

a. Incorrect. Programs that can handle exceptions appropriately are said to be more fault tolerant and robust than those that do not.

b. Incorrect. The term critical functionality does not describe the degree to which a system is resilient to stress and able to maintain correct functioning. c. Incorrect. The term load forgiveness does not describe the degree to which a system is resilient to stress and able to maintain correct functioning. d. Correct. The term robustness describes the degree to which a system is resilient to stress, maintaining correct functioning.

POINTS: 1 REFERENCES: Understanding Exceptions QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.01 - Describe exceptions, the Exception class, and SystemExceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

11. According to the creators of C#, an infrequent event in code is one that happens in less than what percent of all program executions? a. 10% b. 25% c. 30% d. 35% ANSWER:

c

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a. Incorrect. The creators of C# do not define ―infrequent‖ as an event that happens

FEEDBACK:

less than 10 percent of the time. b. Incorrect. The creators of C# do not define ―infrequent‖ as an event that happens less than 25 percent of the time. c. Correct. The creators of C# define ―infrequent‖ as an event that happens less than 30 percent of the time. d. Incorrect. The creators of C# do not define ―infrequent‖ as an event that happens less than 35 percent of the time.

POINTS: 1 REFERENCES: Comparing Traditional and Object-Oriented Error-Handling Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.02 - Compare traditional and object-oriented error-handling methods DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

12. When writing a block of code in which something can go wrong, where should you place the block? a. It should be placed in a try block. b. It should be placed after a catch statement. c. It should be prefaced with a finally statement. d. It should be defined as an exception block.

ANSWER: FEEDBACK:

a

a. Correct. When you write a block of code in which something can go wrong, you can place the code in a try block. b. Incorrect. When you write a block of code in which something can go wrong, you should not place the code in a catch block. c. Incorrect. When you write a block of code in which something can go wrong, you should not place the code in a finally block. d. Incorrect. When you write a block of code in which something can go wrong, you should not place the code in an exception block.

POINTS: 1 REFERENCES: Comparing Traditional and Object-Oriented Error-Handling Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.02 - Compare traditional and object-oriented error-handling methods DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

13. A catch block can catch how many types of Exceptions? a. An unlimited number of Exception types. b. Only one can be caught. c. As many as can be matched. d. Two, after which the program ends.

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b

a. Incorrect. A catch block cannot catch an unlimited number of Exception types. b. Correct. Each catch block can ―catch‖ one type of exception—that is, an Exception object or an object of one of its child classes. c. Incorrect. A catch block cannot catch as many types of Exceptions as can be matched. d. Incorrect. A catch block cannot catch two types of Exceptions.

POINTS: 1 REFERENCES: Comparing Traditional and Object-Oriented Error-Handling Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.02 - Compare traditional and object-oriented error-handling methods DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

14. What method is overridden by the Exception class in order to provide a descriptive error message and provide a user with precise information about the nature of any Exception that is thrown? a. Message() b. StackTrace() c. ToString() d. ThrownMessage() ANSWER: FEEDBACK:

c

a. Incorrect. Message() is not a method. b. Incorrect. StackTrace is not a built-in method in C#. StackTrace is a property that provides a list of methods in the call stack so that you can determine the location where the Exception object was created.

c. Correct. The Exception class overrides ToString() to provide a descriptive error message so that a user can receive precise information about the nature of any Exception that is thrown.

d. Incorrect. ThrownMessage() is not a built-in method in C#.

POINTS: 1 REFERENCES: Using the Exception Class's ToString() Method and Message Property QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.03 - Use the Exception class’s ToString() method and Message property DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

15. What read-only property in the Exception class contains useful information about an Exception object? a. StackTrace b. Message Copyright Cengage Learning. Powered by Cognero.

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c. toString d. ThrownText ANSWER: FEEDBACK:

b

a. Incorrect. When you catch an Exception, you can display the value of StackTrace to provide a list of methods in the call stack so that you can determine the location where the Exception object was created. b. Correct. The Exception class contains a read-only property named Message that contains useful information about an Exception object. c. Incorrect. toSting is not a read-only property in the Exception class that contains useful information about an Exception object. d. Incorrect. ThrownText is not a property in the Exception class.

POINTS: 1 REFERENCES: Using the Exception Class's ToString() Method and Message Property QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.03 - Use the Exception class’s ToString() method and Message property DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

16. A block that contains statements that can never execute under any circumstances due to a program's logic is known as what kind of block? a. default block b. comment block c. finally block d. unreachable block ANSWER: FEEDBACK:

d

a. Incorrect. Default block is not a commonly used programming term. b. Incorrect. Although comments do not execute, comment block is not a commonly used programming term.

c. Incorrect. A finally block can follow a try block. Code within a finally block executes whether the try block identifies any Exceptions or not. d. Correct. Unreachable blocks contain statements that can never execute under any circumstances because the program logic ―can’t get there.‖

POINTS: 1 REFERENCES: Catching Multiple Exceptions QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.04 - Catch multiple exceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

17. What methods are used to convert string data to another data type, such as int, double, or bool, without Copyright Cengage Learning. Powered by Cognero.

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fear of generating an exception? a. TryData() b. TryFromString() c. TryParse() d. TryConvert() ANSWER: FEEDBACK:

c

a. Incorrect. TryData() is not a built-in method in C#. b. Incorrect. TryFromString() is not a built-in method in C#. c. Correct. The TryParse() method can be used to convert string data to another data type, such as int, double, or bool, without fear of generating an exception. d. Incorrect. TryConvert() is not a built-in method in C#.

POINTS: 1 REFERENCES: Examing the Structure of the TryParse() Methods QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.05 - Describe the structure of the TryParse() methods DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

18. In general, what block do you use to perform clean-up tasks that must occur, regardless of whether any errors occurred or were caught? a. default block b. always block c. execute block d. finally block ANSWER: FEEDBACK:

d

a. Incorrect. A default block is not the name for a block that performs clean-up tasks. b. Incorrect. An always block is not the name for a block that performs clean-up tasks. c. Incorrect. An execute block is not the name for a block that performs cleanup tasks. d. Correct. Typically, you use the finally block to perform clean-up tasks that must occur, regardless of whether any errors occurred or were caught.

POINTS: 1 REFERENCES: Using the finally Block QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.06 - Use the finally block DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM Copyright Cengage Learning. Powered by Cognero.

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19. What method can be used to terminate an application? a. Environment.Exit() b. Environment.Bye() c. Environment.Quit() d. Environment.Terminate() ANSWER: FEEDBACK:

a

a. Correct. The Environment.Exit()method terminates a program and passes an argument to the operating system. b. Incorrect. Environment.Bye() is not a built-in method in C#.

c. Incorrect. Environment.Quit() is not a built-in method in C#. d. Incorrect. Environment.Terminate() is not a built-in method in C#.

POINTS: 1 REFERENCES: Using the finally Block QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.06 - Use the finally block DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

20. What block can you use to ensure that input and output related files are properly closed? a. execute b. always c. finally d. default ANSWER: FEEDBACK:

c

a. Incorrect. The block that ensures files are closed is not called the execute block. b. Incorrect. The The block that ensures files are closed is not called the always block.

c. Correct. The finally block is used frequently with file input and output to ensure that open files are closed. d. Incorrect. The The block that ensures files are closed is not called the default block.

POINTS: 1 REFERENCES: Using the finally Block QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.06 - Use the finally block DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

21. What type of exception is thrown if there is an issue with file operations, such as opening, reading from, or writing to a file?

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a. FileException b. StorageException c. FException d. IOException ANSWER: FEEDBACK:

d

a. Incorrect. FileException is not a built-in type of Exception. b. Incorrect. StorageException is not the type of Exception thrown if there is an issue with file operations. c. Incorrect. FException is not a built-in type of Exception.

d. Correct. An IOException is the type of Exception automatically generated if there is a problem opening a file, reading data from a file, or writing to a file.

POINTS: 1 REFERENCES: Using the finally Block QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.06 - Use the finally block DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

22. The memory location where the computer stores the list of locations to which the system must return is known by what term? a. The method call trace. b. The memory call pool. c. The call stack. d. The function call.

ANSWER: FEEDBACK:

c

a. Incorrect. The call trace is not where the computer stores the list of locations. b. Incorrect. The call pool is not where the computer stores the list of locations. c. Correct. The memory location where the computer stores the list of locations to which the system must return is known as the call stack. d. Incorrect. The function call is not where the computer stores the list of locations.

POINTS: 1 REFERENCES: Tracing Exception Objects Through the Call Stack QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.08 - Trace Exception objects through the call stack DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

23. What is the system of passing an exception through a chain of calling methods called? a. propagating the exception Copyright Cengage Learning. Powered by Cognero.

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b. tracing the exception c. stacking the exception d. inheriting the exception ANSWER: FEEDBACK:

a

a. Correct. The system of passing an exception through the chain of calling methods is called propagating the exception. b. Incorrect. Tracing the exception is not the system of passing an exception through a chain of calling methods. c. Incorrect. Stacking the exception is not the system of passing an exception through a chain of calling methods. d. Incorrect. Inheriting is the ability to extend a class so as to create a more specific class that contains all the attributes and methods of a more general class.

POINTS: 1 REFERENCES: Tracing Exception Objects Through the Call Stack QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.08 - Trace Exception objects through the call stack DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

24. When you catch an Exception, what property holds a list of methods in the call stack as its value, allowing you to determine the location of the Exception? a. StackTrace b. CallTrace c. MethodTrace d. ClassTrace ANSWER: FEEDBACK:

a

a. Correct. When you catch an Exception, you can display the value of StackTrace to provide a list of methods in the call stack so that you can determine the location where the Exception object was created. b. Incorrect. CallTrace is not a built-in property. c. Incorrect. MethodTrace is not a built-in property. d. Incorrect. ClassTrace is not a built-in property.

POINTS: 1 REFERENCES: Tracing Exception Objects Through the Call Stack QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.08 - Trace Exception objects through the call stack DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

25. What class should you extend in order to create your own Exception that you can throw? a. ApplicationException Copyright Cengage Learning. Powered by Cognero.

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b. ExceptionObject c. SystemException d. Object ANSWER: FEEDBACK:

a

a. Correct. To create your own Exception type from which you can instantiate throwable objects, you can extend the ApplicationException class, which is a subclass of Exception. b. Incorrect. ExceptionObject is not a built-in class. c. Incorrect. Extending a SystemException class does not allow you to create your own Exception that you can throw. d. Incorrect. Extending the Object class does not allow you to create your own Exception that you can throw.

POINTS: 1 REFERENCES: Creating Your Own Exception Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.09 - Create your own Exception classes DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

26. The ApplicationException class is a sublcass of what other class? a. SystemException b. Exception c. ObjectException d. MainException ANSWER: FEEDBACK:

b

a. Incorrect. The SystemException class derives from the Exception class, which is a child of the Object class. b. Correct. To create your own Exception type from which you can instantiate throwable objects, you can extend the ApplicationException class, which is a subclass of Exception, or you can extend Exception. c. Incorrect. ObjectException is not a built-in class. d. Incorrect. MainException is not a built-in class.

POINTS: 1 REFERENCES: Creating Your Own Exception Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.09 - Create your own Exception classes DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

27. When you write a method that catches an Exception, rather than handling the Exception itself, it can Copyright Cengage Learning. Powered by Cognero.

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pass the exception to the method that called your method. What is this known as? a. rethrowing the Exception b. saving the Exception c. opening the Exception d. sideloading the Exception ANSWER: FEEDBACK:

a

a. Correct. To rethrow an Exception is to throw a caught exception to a calling method. b. Incorrect. A method that does not handle a caught Exception, but instead passes it to a calling method is not saving the Exception.

c. Incorrect. A method that does not handle a caught Exception, but instead passes it to a calling method is not opening the Exception. d. Incorrect. A method that does not handle a caught Exception, but instead passes it to a calling method is not sideloading the Exception.

POINTS: 1 REFERENCES: Rethrowing an Exception QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.10 - Rethrow Exceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

28. When creating an Exception class, what is not one of the three recommended constructors needed? a. A default constructor. b. A constructor that takes a string message. c. A constructor that takes a string message and an inner exception. d. A constructor that takes a byte variable containing memory dumps.

ANSWER: FEEDBACK:

d

a. Incorrect. The Microsoft documentation recommends creating three constructors for every exception class you create, and the default constructor is one of them. b. Incorrect. The Microsoft documentation recommends creating three constructors for every Exception class you create, and a constructor that takes a string message is one of them. c. Incorrect. The Microsoft documentation recommends creating three constructors for every exception class you create, and a constructor that takes a string message and an inner Exception is one of them. d. Correct. The Microsoft documentation recommends creating three constructors for every exception class you create: the default constructor, a constructor that takes a string message, and a constructor that takes a string message and an inner Exception.

POINTS: REFERENCES:

1 Creating Your Own Exception Classes

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QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.09 - Create your own Exception classes DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

29. The Environment.Exit() method is part of what namespace? a. Exception b. System c. Quit d. Language ANSWER: FEEDBACK:

b

a. Incorrect. Exception is not a namespace. b. Correct. The Environment.Exit() method is part of the System namespace. c. Incorrect. Quit is not a namespace.

d. Incorrect. Language is not a namespace.

POINTS: 1 REFERENCES: Using the finally Block QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.06 - Use the finally block DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

30. What happens when you divide a floating-point value by 0 in C#? a. No exception occurs, and the special value Infinity is returned as the result. b. The program will throw an exception of type System.DivideByZeroException. c. The program will catch the exception, and return Undefined as the result. d. The program will crash.

ANSWER: FEEDBACK:

a

a. Correct. When you divide a floating-point value by 0 in C#, no exception occurs.

Instead, C# assigns the special value Infinity to the result. b. Incorrect. A floating value divided by 0 does not cause a DivideByZeroException. An integer divided by 0 causes a DivideByZeroException. c. Incorrect. The program will not catch the exception and return Undefined if you divide a floating-point value by 0 in C#. d. Incorrect. The program will not crash if you divide a floating-point value by 0 in C#.

POINTS: REFERENCES:

1 Understanding Exceptions

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QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.01 - Describe exceptions, the Exception class, and SystemExceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

Match each item with a statement below. a. IOException b. InvalidPrinterException c. System.ArgumentException d. catch block e. IndexOutOfRangeException f. unreachable code g. finally block h. Environment.Exit() i. throw j. fault-tolerant REFERENCES: Glossary QUESTION TYPE: Matching HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.11.01 - Describe exceptions, the Exception class, and SystemExceptions MVC#.FARR.18.11.02 - Compare traditional and object-oriented error-handling methods MVC#.FARR.18.11.04 - Catch multiple exceptions MVC#.FARR.18.11.06 - Use the finally block MVC#.FARR.18.11.10 - Rethrow Exceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

31. Exception class for input and output errors.

ANSWER: a POINTS: 1

32. Exception class for when a user requests an invalid printer.

ANSWER: b POINTS: 1

33. Thrown when one of the arguments provided to a method is not valid.

ANSWER: c POINTS: 1

34. Sometimes referred to as a catch clause.

ANSWER: d POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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35. Occurs when an array subscript is not within the allowed range.

ANSWER: e POINTS: 1

36. Also known as dead code, this consists of statements that will never execute under any circumstances.

ANSWER: f POINTS: 1

37. Performs clean-up tasks at the end of a try…catch sequence.

ANSWER: g POINTS: 1

38. Terminates a program and passes the argument (which can be any integer) to the operating system.

ANSWER: h POINTS: 1

39. Used to rethrow an Exception.

ANSWER: i POINTS: 1

40. The ability to continue to operate, possibly at a reduced level, when some part of a system fails.

ANSWER: j POINTS: 1

41. Most exceptions that are used by programmers derive from three C# classes. What are those classes?

ANSWER: Most exceptions will derive from three classes: * The predefined Common Language Runtime exception classes derived from SystemException * The user-defined application exception classes you derive from ApplicationException * The Exception class, which is the parent of SystemException and ApplicationException POINTS: 1 REFERENCES: Understanding Exceptions QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.11.01 - Describe exceptions, the Exception class, and SystemExceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

42. The following example shows how a programmer might avoid a division by zero error by explicitly checking for the error condition: if(gallonsOfGas != 0) mpg = milesDriven /gallonsOfGas; Copyright Cengage Learning. Powered by Cognero.

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else mpg = 0; Another possible way to deal with this is to use exception handling mechanisms. What factors help the programmer decide which of these methods to use?

ANSWER: The example code represents the most efficient method of handling the error if you think it will be a frequent problem. Because a program that contains this code does not have to instantiate an Exception object every time the user enters a 0 for the value of gallonsOfGas, the program saves time and computer memory. On the other hand, if you think dividing by zero will be infrequent, then the decision will execute many times when it is not needed. In other words, if a user enters 0 for gallonsOfGas in only one case out of 1,000, then the if statement is executed unnecessarily 999 times. In that case, it is more efficient to eliminate the if test and instantiate an Exception object when needed.

Another advantage to using exception handling instead of decision making to control errors is that when a program's main logic is interrupted by a series of statements and decisions that might detect errors, the program can become more complicated and difficult to understand. The object-oriented approach to error handling separates a program's main tasks from code that deals with rare exceptions.

POINTS: 1 REFERENCES: Comparing Traditional and Object-Oriented Error-Handling Methods QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.11.02 - Compare traditional and object-oriented error-handling methods DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

43. Show the syntax (the general form) of a try…catch pair.

ANSWER: try { // Any number of statements; // some might cause an exception } catch(XxxException anExceptionInstance) { // Do something about it } // Statements here execute whether there was an exception or not where XxxException represents the Exception class or any of its more specific subclasses and is the data type of the anExceptionInstance object.

POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Comparing Traditional and Object-Oriented Error-Handling Methods Subjective Short Answer False

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STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.11.02 - Compare traditional and object-oriented error-handling methods DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

44. When an Exception object is thrown and multiple catch blocks are present, what happens?

ANSWER: When an Exception is thrown and multiple catch blocks are present, the catch blocks are examined in sequence until a match is found. The matching catch block then executes, and each remaining catch block is bypassed.

POINTS: 1 REFERENCES: Catching Multiple Exceptions QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.11.04 - Catch multiple exceptions DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

45. The int version of the TryParse() methods converts string data to an int. The first argument is the string that you want to convert, and the second argument is an out parameter that receives the result if the conversion is successful, or 0 if it is not. The method returns a Boolean value that indicates whether the conversion was successful. Write this method using exception handling techniques to ensure that the method returns correctly whether or not the conversion is successful. Use the method Convert.ToInt32(inputString) to do the conversion.

ANSWER: The method should be similar to the following example: public static bool TryParse(string inputString, out int number) { bool wasSuccessful = true; try { number = Convert.ToInt32(inputString); } catch(FormatException e) { wasSuccessful = false; number = 0; } return wasSuccessful; } POINTS: 1 REFERENCES: Examining the Structure of the TryParse() Methods QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic Copyright Cengage Learning. Powered by Cognero.

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LEARNING OBJECTIVES: MVC#.FARR.18.11.05 - Describe the structure of the TryParse() methods DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

46. Why might a finally block be necessary?

ANSWER: At first glance, it seems as though the finally block serves no purpose. When a try block works without error, control passes to the statements that come after the catch block. Additionally, if the try code fails and throws an Exception that is caught, then the catch block executes, and control again passes to any statements that are coded after the catch block. Therefore, it seems as though the statements after the catch block always execute, so there is no need to place any statement within a special finally block. However, the last set of statements after the catch might never execute for at least two reasons: * An Exception for which you did not plan might occur, terminating the program. * The try or catch block might contain a statement that terminates the application POINTS: 1 REFERENCES: Using the finally Block QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.11.06 - Use the finally block DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

47. If a finally block is associated with a try…catch pair, what are the three possible outcomes of the try that result in execution of the finally block?

ANSWER: The code in the finally block executes no matter which of the following outcomes of the try block occurs: * The try ends normally. * The catch executes. * The try ends abnormally and the catch does not execute.

POINTS: 1 REFERENCES: Using the finally Block QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.11.06 - Use the finally block DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

48. When you design classes containing methods that have statements that might throw exceptions, you can create the methods so they throw the Exception object but do not handle it. Why might you want to do this?

ANSWER: Handling an exception can be left to the client-the program that uses your class-so the exception can be handled in an appropriate way for the application.

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POINTS: 1 REFERENCES: Handling Exceptions Thrown from Outside Methods QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.11.07 - Handle exceptions thrown from outside methods DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

49. The StackTrace property of an Exception can be a useful debugging tool. How is this property used when debugging?

ANSWER: The StackTrace property is a useful Exception property. When you catch an Exception, you can display the value of StackTrace to provide a list of methods in the call stack so you can determine the location where the Exception object was created.

POINTS: 1 REFERENCES: Tracing Exception Objects Through the Call Stack QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.11.08 - Trace Exception objects through the call stack DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM

50. What types of objects can be explicitly thrown?

ANSWER: In C#, you cannot throw an object unless it is an Exception or a descendant of the Exception class. In other words, you cannot throw a double or a BankAccount. However, you can throw any type of Exception at any time, not just Exceptions of your own creation. For example, within any program you can code any of the following: throw(new ApplicationException()); throw(new IndexOutOfRangeException()); throw(new Exception()); Of course, you should not throw an IndexOutOfRangeException when you encounter division by 0 or data of an incorrect type; you should use it only when an index (subscript) is too high or too low.

POINTS: 1 REFERENCES: Creating Your Own Exception Classes QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.11.09 - Create your own Exception classes DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:01 PM Copyright Cengage Learning. Powered by Cognero.

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1. Each Control has more than 80 public properties. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. Each Control has more than 80 public properties and 20 protected properties.

Incorrect Incorrect. Each Control has more than 80 public properties and

20 protected properties.

POINTS: 1 REFERENCES: Understanding Controls QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.01 - Use Controls DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

2. A LinkLabel is similar to a Label in that it is a parent of Label. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. LinkLabel is a child of Label.

Incorrect Incorrect. LinkLabel is a child of Label.

POINTS: 1 REFERENCES: Using a LinkLabel QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.04 - Create a Form that contains LinkLabels DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

3. The default text color for a LinkLabel is purple. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. The default text color for a LinkLabel is blue.

Incorrect Incorrect. The default text color for a LinkLabel is blue.

POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Using a LinkLabel True / False False

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LEARNING OBJECTIVES: MVC#.FARR.18.12.04 - Create a Form that contains LinkLabels DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

4. C# allows you to create custom colors. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. The Color class contains a wide variety of predefined Colors that you can use with your Controls. C# also allows you to create custom colors.

Incorrect Incorrect. The Color class contains a wide variety of predefined Colors that

you can use with your Controls. C# also allows you to create custom colors.

POINTS: 1 REFERENCES: Adding Color to a Form QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.05 - Add color to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

5. When you size a ListBox so that all the items cannot be displayed at the same time, a scroll bar is provided automatically on the side. a. True b. False ANSWER: FEEDBACK:

True Correct. When you size a ListBox so that all the items cannot be displayed at the same time, a scroll bar is provided automatically on the side.

Incorrect Incorrect. When you size a ListBox so that all the items cannot be displayed at the same time, a scroll bar is provided automatically on the side.

Correct

POINTS: 1 REFERENCES: Adding ListBox , CheckedListBox , and ComboBox Controls to a Form QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.08 - Add ListBox, ComboBox, and CheckedListBox items to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

6. What class provides the definitions for GUI objects? a. Control b. Object c. Widget d. Gadget ANSWER:

a

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a. Correct. The Control class provides definitions for GUI objects such as Forms and Buttons. b. Incorrect. The Object class type in the System namespace is the root base

FEEDBACK:

class for all other types. c. Incorrect. Widget is not a built-in class in C#.

d. Incorrect. Gadget is not a built-in class in C#.

POINTS: 1 REFERENCES: Using Controls QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.01 - Use Controls DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

7. What object can you instantiate on a remote computer so that you can manipulate a reference to the object rather than a local copy of the object? a. ByRefObject b. RemoteRefObject c. RemoteObject d. MarshalByRefObject ANSWER: FEEDBACK:

d

a. Incorrect. ByRefObject is not a built-in object. b. Incorrect. RemoteRefObject is not a built-in object. c. Incorrect. RemoteObject is not a built-in object. d. Correct. A MarshalByRefObject is one you can instantiate on a remote computer so that you can manipulate a reference to the object rather than a local copy of the object.

POINTS: 1 REFERENCES: Understanding Controls QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.01 - Use Controls DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

8. When designing a Form, what design feature facilitated by the IDE will you typically utilize instead of typing code statements? a. class automatic generation b. drag-and-drop code generation c. button serialization d. object instantiation Copyright Cengage Learning. Powered by Cognero.

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b

a. Incorrect. Class automatic generation is not a design feature facilitated by the IDE. b. Correct. When designing a Form, you should use the drag-and-drop design features in the IDE to place components and use the Properties window in the IDE to set properties instead of typing statements in the code editor. c. Incorrect. Button serialization is not a design feature facilitated by the IDE.

d. Incorrect. Object instantiation is not a design feature facilitated by the IDE. POINTS: 1 REFERENCES: Examining the IDE's Automatically Generated Code QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.02 - Understand the IDE’s automatically generated code DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

9. What class do you utilize to change the appearance of printed text on your Forms? a. Text b. ForeText c. Font d. FontText ANSWER: FEEDBACK:

c

a. Incorrect. Text is not a built-in class. b. Incorrect. ForeText is not a built-in class. c. Correct. You use the Font class to change the appearance of printed text on your Forms. d. Incorrect. FontText is not a built-in class.

POINTS: 1 REFERENCES: Setting a Control's Font QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.03 - Set a Control’s Font DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

10. What can you use to provide the capability to link a user of your program to other sources, such as Web pages or files? a. Label b. FileLabel c. ResourceLabel d. LinkLabel ANSWER:

d

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a. Incorrect. Label cannot be used to provide the capability to link a user of a

FEEDBACK:

program to other sources. b. Incorrect. FileLabel cannot be used to provide the capability to link a user of a program to other sources. c. Incorrect. ResourceLabel cannot be used to provide the capability to link a user of a program to other sources. d. Correct. A LinkLabel is a control with a label that provides the user with a way to link to other sources, such as Web pages or files. The C# class that creates a link label is LinkLabel.

POINTS: 1 REFERENCES: Using a LinkLabel QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.04 - Create a Form that contains LinkLabels DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

11. What type of object is a GUI widget the user can click to select an option, and allows for any number of these objects to be selected at the same time? a. ListBox b. RadioButton c. CheckBox d. CheckedListBox ANSWER: FEEDBACK:

c

a. Incorrect. A ListBox is a GUI element that displays a list of items that the user can select by clicking. b. Incorrect. When options are grouped so that only one can be checked at a time and selecting one deselects the others, they are called radio buttons. The C# class that creates a radio button is RadioButton.

c. Correct. A CheckBox is a rectangular control that indicates whether a user has chosen an option. The C# class that allows you to create a check box is CheckBox. When a form contains multiple check boxes, the user can select any number of them. d. Incorrect. A CheckedListBox allows users to select choices from a list.

POINTS: 1 REFERENCES: Using CheckBox and RadioButton Objects QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.06 - Add CheckBox and RadioButton objects to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

12. What type of GUI widget object allows the user to click to select an option, but only allows for one within a given group to be selected at a time?

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a. CheckButton b. RadioButton c. ListBox d. RadioCheckedButton ANSWER: FEEDBACK:

b

a. Incorrect. CheckButton is not a type of GUI widget. b. Correct. When options are grouped so that only one can be checked at a time and selecting one deselects the others, they are called radio buttons. The C# class that creates a radio button is RadioButton.

c. Incorrect. A ListBox is a GUI element that displays a list of items that the user can select by clicking. d. Incorrect. A RadioCheckedButton is not a type of GUI widget.

POINTS: 1 REFERENCES: Using CheckBox and RadioButton Objects QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.06 - Add CheckBox and RadioButton objects to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

13. What character can be placed before a letter in the Text property value of a ButtonBase object to make the letter function as an access key? a. & b. % c. $ d. # ANSWER: FEEDBACK:

a

a. Correct. If you precede a letter with an ampersand ( & ) in the Text property value of a ButtonBase object, that letter acts as an access key. b. Incorrect. The % character does not make the letter function as an access key when placed before a letter in the Text property value of a ButtonBase. c. Incorrect. The $ character does not make the letter function as an access key when placed before a letter in the Text property value of a ButtonBase. d. Incorrect. The # character does not make the letter function as an access key when placed before a letter in the Text property value of a ButtonBase.

POINTS: 1 REFERENCES: Using CheckBox and RadioButton Objects QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.06 - Add CheckBox and RadioButton objects to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM Copyright Cengage Learning. Powered by Cognero.

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14. What method is shared by CheckBox and RadioButton objects and is called when the object is clicked by the user? a. Changed() b. ClickedChanged() c. CheckedChanged() d. ValueChanged() ANSWER: FEEDBACK:

c

a. Incorrect. Changed() is not shared by CheckBox and RadioButton. b. Incorrect. ClickedChanged() is not a method. c. Correct. The default method that executes when a user clicks either a CheckBox or RadioButton is xxx_CheckedChanged(), where xxx represents the name of the invoking object. d. Incorrect. ValueChanged() is the default event that is generated when the Value property changes. It is not shared by CheckBox and RadioButton.

POINTS: 1 REFERENCES: Using CheckBox and RadioButton Objects QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.06 - Add CheckBox and RadioButton objects to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

15. ListBox, ComboBox, and CheckedListBox objects all allow users to select choices from a list. These three classes descend from what parent class? a. ListBase b. ListControl c. BaseList d. List ANSWER: FEEDBACK:

b

a. Incorrect. ListBase is not a parent class. b. Correct. ListBox, ComboBox, and CheckedListBox objects descend from ListControl and enable you to display lists of items that the user can select by clicking. c. Incorrect. BaseList is not a parent class.

d. Incorrect. List is not a parent class.

POINTS: 1 REFERENCES: Adding ListBox, CheckedListBox, and ComboBox Controls to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.08 - Add ListBox, ComboBox, and CheckedListBox items to a Form DATE CREATED: 5/16/2017 12:59 PM Copyright Cengage Learning. Powered by Cognero.

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16. What ListBox property with a Boolean value allows you to configure whether or not to display items in columns instead of a straight vertical list? a. SingleColumn b. MoreColumn c. OneColumn d. MultiColumn ANSWER: FEEDBACK:

d

a. Incorrect. SingleColumn is not a ListBox property. b. Incorrect. MoreColumn is not a ListBox property. c. Incorrect. OneColumn is not a ListBox property. d. Correct. The ListBox property MultiColumn indicates whether or not display can be in multiple columns.

POINTS: 1 REFERENCES: Adding ListBox, CheckedListBox, and ComboBox Controls to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.08 - Add ListBox, ComboBox, and CheckedListBox items to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

17. What is similar to a ListBox, except that it displays an additional editing field to allow the user to select from the list or to enter new text? a. ComboBox b. CheckBox c. CheckedListBox d. ComboListBox ANSWER: FEEDBACK:

a

a. Correct. A combo box is a combination of a list box and an editing control that allows a user to select from the list or enter new text. The C# class is ComboBox, and the default ComboBox displays an editing area with a hidden list box. b. Incorrect. CheckBox objects are GUI widgets that the user can click to select or deselect an option. When a Form contains multiple CheckBoxes, any number of them can be checked or unchecked at the same time. c. Incorrect. A CheckedListBox is similar to a ListBox, with check boxes appearing to the left of each desired item. It does not display an additional editing field. d. Incorrect. A ComboListBox is not a type of built-in object.

POINTS: REFERENCES: QUESTION TYPE:

1 Adding ListBox, CheckedListBox, and ComboBox Controls to a Form Multiple Choice

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HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.08 - Add ListBox, ComboBox, and CheckedListBox items to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

18. What object is similar to a ListBox but with check boxes appearing to the left of each item? a. CheckBox b. ButtonBox c. ComboBox d. CheckedListBox ANSWER: FEEDBACK:

d

a. Incorrect. CheckBox objects are GUI widgets that the user can click to select or deselect an option. When a Form contains multiple CheckBoxes, any number of them can be checked or unchecked at the same time. b. Incorrect. A ButtonBox is not an object.

c. Incorrect. A ComboBox is a combination of a list box and an editing control that allows a user to select from the list or enter new text. d. Correct. A CheckedListBox is similar to a ListBox, with check boxes appearing to the left of each desired item.

POINTS: 1 REFERENCES: Adding ListBox, CheckedListBox, and ComboBox Controls to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.08 - Add ListBox, ComboBox, and CheckedListBox items to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

19. What Control allows you to retrieve date information? a. Calendar b. MonthCalendar c. DateCalendar d. CalendarPicker ANSWER: FEEDBACK:

b

a. Incorrect. Calendar is not a Control. b. Correct. The MonthCalendar and DateTimePicker Controls allow you to retrieve date and time information. c. Incorrect. DateCalendar is not a Control.

d. Incorrect. CalendarPicker is not a Control.

POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Adding MonthCalendar and DateTimePicker Controls to a Form Multiple Choice False

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LEARNING OBJECTIVES: MVC#.FARR.18.12.09 - Add a MonthCalendar and DateTimePicker to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

20. What Control displays a month calendar when the down arrow is selected? a. MonthCalendar b. CalendarPicker c. DateTimePicker d. DatePicker ANSWER: FEEDBACK:

c

a. Incorrect. A MonthCalendar Control allows you to retrieve and time information. b. Incorrect. CalendarPicker is not a Control.

c. Correct. The DateTimePicker Control displays a month calendar when the down arrow is selected. d. Incorrect. DatePicker is not a Control.

POINTS: 1 REFERENCES: Understanding Controls QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.09 - Add a MonthCalendar and DateTimePicker to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

21. When you drag multiple Controls onto a Form, what appears to help you align new Controls with others already in place? a. alignment dots b. blue dotted lines c. blue grip angles d. blue snap lines ANSWER: FEEDBACK:

d

a. Incorrect. Alignment dots do not appear when you drag multiple Controls onto a Form to help you align new Controls with others already in place. b. Incorrect. Blue dotted lines do not appear when you drag multiple Controls onto a Form to help you align new Controls with others already in place. c. Incorrect. Blue grip angles do not appear when you drag multiple Controls onto a Form to help you align new Controls with others already in place. d. Correct. When you drag multiple Controls onto a Form, blue snap lines appear and help you align new Controls with others already in place.

POINTS: REFERENCES:

1 Working with a Form's Layout

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QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.10 - Work with a Form’s layout DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

22. What property can be configured to cause a Control to remain at a fixed distance from the side of a container when the user resizes it? a. Dock b. Padding c. Anchor d. Filling ANSWER: FEEDBACK:

c

a. Incorrect. Setting the Dock property attaches a Control to the side of a container so that the Control stretches when the container’s size is adjusted. b. Incorrect. Padding is not a property. c. Correct. Setting the Anchor property causes a Control to remain at a fixed distance from the side of a container when the user resizes it. d. Incorrect. Filling is not a property.

POINTS: 1 REFERENCES: Working with a Form's Layout QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.10 - Work with a Form’s layout DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

23. What property can you set in order to attach a Control to the side of a container so that the Control stretches when the container's size is adjusted? a. Anchor b. Dock c. Padding d. Filling ANSWER: FEEDBACK:

b

a. Incorrect. The Anchor property causes a Control to remain at a fixed distance from the side of a container when the user resizes it. b. Correct. Setting the Dock property attaches a Control to the side of a container so that the Control stretches when the container’s size is adjusted.

c. Incorrect. Padding is not a property. d. Incorrect. Filling is not a property.

POINTS: REFERENCES:

1 Working with a Form's Layout

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QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.10 - Work with a Form’s layout DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

24. In a MenuStrip, placing what character in front of a unique letter allows the user to press Alt and then the given letter to activate the menu choice as an alternative to clicking it with the mouse? a. % b. $ c. & d. > ANSWER: FEEDBACK:

c

a. Incorrect. Placing the % character in front of a unique letter does not allow the user to press Alt and then the given letter to activate the menu choice. b. Incorrect. Placing the $ character in front of a unique letter does not allow the user to press Alt and then the given letter to activate the menu choice. c. Correct. If you create each menu item with an ampersand ( & ) in front of a unique letter, then the letter becomes an access key, and the user can press Alt and the letter to activate the menu choice. d. Incorrect. Placing the > character in front of a unique letter does not allow the user to press Alt and then the given letter to activate the menu choice.

POINTS: 1 REFERENCES: Adding a MenuStrip to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.11 - Add a MenuStrip to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

25. When filling in the items in a MenuStrip control, double-clicking an entry automatically generates what type of method? a. Change() b. SetSelected() c. Click() d. SelectedIndexChanged() ANSWER: FEEDBACK:

c

a. Incorrect. Change() is not a type of method. b. Incorrect. When filling in the items in a MenuStrip control, double-clicking an entry does not automatically generate the SetSelected() method. c. Correct. When you double-click an entry in the MenuStrip, a Click() method is generated. d. Incorrect. When filling in the items in a MenuStrip control, double-clicking

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an entry does not automatically generate the SelectedIndexChanged() method.

POINTS: 1 REFERENCES: Adding a MenuStrip to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.11 - Add a MenuStrip to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

26. When designing a MenuStrip control, the programmer should follow conventional menu order. As an example, where should the Help option be located on the main menu? a. on the far-left side b. in the File submenu c. in the Preferences submenu d. on the far-right side ANSWER: FEEDBACK:

d

a. Incorrect. Users expect the far-left option on the main menu bar to be File. b. Incorrect. Users expect the Exit option to appear under File. c. Incorrect. Users do not expect the Help option to be in the Preferences submenu. d. Correct. If an application contains a Help option, users expect to find it at the right side of the main menu bar.

POINTS: 1 REFERENCES: Adding a MenuStrip to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.11 - Add a MenuStrip to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

27. What public Control property can be used to determine whether a control or one of its child controls currently has the input focus? a. IsFocused b. ContainsFocus c. DetectFocus d. GetFocus ANSWER: FEEDBACK:

b

a. Incorrect. IsFocused is not a public Control property. b. Correct. ContainsFocus gets a value that indicates whether or not the control or one of its child controls currently has the input focus. c. Incorrect. DetectFocus is not a public Control property.

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d. Incorrect. GetFocus is not a public Control property.

POINTS: 1 REFERENCES: Understanding Controls QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.01 - Use Controls DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

28. Where do automatically generated statements that set the properties of the labels, buttons, and forms end up? a. Within the InitializeComponent() method. b. Within the Property class in the Designer.cs file for the form. c. In the Form's class declaration. d. In the Click() method for the object involved.

ANSWER: FEEDBACK:

a

a. Correct. Within the InitializeComponent() method, you can see automatically generated statements that set the properties of the label, the button, and the form. b. Incorrect. Automatically generated statements that set the properties of the labels, buttons, and forms do not end up within the Property class in the Designer.cs file for the form. c. Incorrect. Automatically generated statements that set the properties of the labels, buttons, and forms do not end up in the Form's class declaration. d. Incorrect. Automatically generated statements that set the properties of the labels, buttons, and forms do not end up in the Click() method for the object involved.

POINTS: 1 REFERENCES: Examining the IDE's Automatically Generated Code QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.02 - Understand the IDE’s automatically generated code DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/20/2019 11:51 AM

29. What is a secondary window that takes control of a program known as? a. modal window b. popup box c. message interrupter d. focus grabber ANSWER: FEEDBACK:

a

a. Correct. A modal window is a secondary window that takes control from a primary window and that a user must deal with before proceeding.

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b. Incorrect. A popup window is not a secondary window that takes control of a program. c. Incorrect. A message interrupter is not a secondary window that takes control of a program. d. Incorrect. A focus grabber is not a secondary window that takes control of a program.

POINTS: 1 REFERENCES: Using Other Controls QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.12 - Use other controls DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

30. What property for a MonthCalendar object allows you to specify the last day that can be selected? a. LastDate b. EndDate c. MaxDate d. SelectionRange ANSWER: FEEDBACK:

c

a. Incorrect.LastDate is not a property for a MonthCalendar object. b. Incorrect. EndDate is not a property for a MonthCalendar object. c. Correct. MaxDate sets the last date that can be selected for a MonthCalendar object. d. Incorrect. SelectionRange are the dates selected by the user for a MonthCalendar object.

POINTS: 1 REFERENCES: Adding MonthCalendar and DateTimePicker Controls to a Form QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.09 - Add a MonthCalendar and DateTimePicker to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

Match each item with a statement below. a. Component b. Control.Capture c. Anchor d. LinkClicked() e. ListBox f. Items.Count g. Dock h. DateChanged() Copyright Cengage Learning. Powered by Cognero.

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i. MenuStrip j. widgets REFERENCES: Glossary QUESTION TYPE: Matching HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.12.01 - Use Controls MVC#.FARR.18.12.04 - Create a Form that contains LinkLabels MVC#.FARR.18.12.08 - Add ListBox, ComboBox, and CheckedListBox items to a Form MVC#.FARR.18.12.09 - Add a MonthCalendar and DateTimePicker to a Form MVC#.FARR.18.12.10 - Work with a Form’s layout MVC#.FARR.18.12.11 - Add a MenuStrip to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

31. A class that provides containment and cleanup for other objects.

ANSWER: a POINTS: 1

32. Gets or sets a value indicating whether the control has captured the mouse ANSWER: b POINTS: 1

33. A property that can be used to fix a Control at a given distance from the side of a container when the container is resized ANSWER: c POINTS: 1

34. The method executed when a click event is fired from a LinkLabel ANSWER: d POINTS: 1

35. Displays a list of items that the user can select by clicking ANSWER: e POINTS: 1

36. A property that holds the number of items in a ListBox ANSWER: f POINTS: 1

37. A property that can be used to attach a Control to the side of a container so that the Control will stretch when the container is resized ANSWER: g POINTS: 1

38. The default event for MonthCalendar ANSWER: h Copyright Cengage Learning. Powered by Cognero.

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POINTS: 1

39. A horizontal list of general options that appears under the title bar of a Form or Window ANSWER: i POINTS: 1

40. Otherwise known as GUI controls.

ANSWER: j POINTS: 1

41. When you create a Form in the Visual Studio IDE, the IDE automatically generates code to support the Form and any Controls that you place on the Form. What do you know about the Form under development given the following snippet of code generated by the IDE? private void InitializeComponent() { this.label1 = new System.Windows.Forms.Label(); this.okButton = new System Windows.Forms.Button(); ... } ANSWER: A Label and a Button have been dragged onto the Form. The Button's Name has been changed to okButton by the user.

POINTS: 1 REFERENCES: Examining the IDE’s Automatically Generated Code QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.12.02 - Understand the IDE’s automatically generated code DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

42. How would you declare a named instance of a Font class, and what arguments can be used within the constructor? Show the declaration for a font named fancyFont that is size 24, bold, underlined, and Helvetica.

ANSWER: One version of the Font constructor requires two arguments: a string and a float.

The string is the name of the font. The float represents the font size. For example: bigFont = new Font("Courier New", 16.5f); You also can create a Font using three arguments, adding FontStyle as in: Font arialItalic = new Font("Arial", 24, FontStyle.Italic); You can combine multiple styles using the pipe (|). For example, the following code creates a Font that is bold and underlined: Font fancyFont = new Font("Helvetica", 24, FontStyle.Bold | FontStyle.Underline); POINTS:

1

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REFERENCES: Setting a Control's Font QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.12.03 - Set a Control’s Font DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

43. What are some of the commonly used LinkLabel properties, and what is the default event generated when the link is clicked by a user?

ANSWER: See the table below: Property or MethodDescription ActiveLinkColorThe color of the link when it is clicked LinkColorThe original color of links before they have been visited; usually blue by default LinkVisitedIf true, the link's color is changed to the VisitedLinkColor VisitedLinkColorThe color of a link after it has been visited; usually purple by default LinkClicked()The default event that is generated when the link is clicked by the user POINTS: 1 REFERENCES: Using a LinkLabel QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.12.04 - Create a Form that contains LinkLabels DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

44. What are some of the commonly used CheckBox and RadioButton properties, and the default event for which a method shell is generated for these classes in the IDE? If you wanted a user to select which pizza toppings he or she wanted from a group of possible toppings, which Control would you use and why?

ANSWER: Commonly used properties include: Property or MethodDescription CheckedIndicates whether the CheckBox or RadioButton is checked TextThe text displayed to the right of the CheckBox or RadioButton CheckedChanged()The default event that is generated when the Checked property changes When a Form contains multiple Checkboxes, any number of them can be checked or unchecked at the same time. RadioButtons differ in that only one RadioButton in a group can be selected at a time. Therefore, Checkboxes would be more suitable for pizza toppings so that multiple toppings could be selected.

POINTS: REFERENCES:

1 Using CheckBox and RadioButton Objects

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QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.12.06 - Add CheckBox and RadioButton objects to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

45. What are some of the commonly used PictureBox properties and the default event for a PictureBox? ANSWER: See the table below: Property or MethodDescription ImageSets the image that appears in the PictureBox SizeModeControls the size and position of the image in the PictureBox; values are Normal, StretchImage (which resizes the image to fit the PictureBox), AutoSize (which resizes the PictureBox to fit the image), and CenterImage (which centers the image in the PictureBox) Click()Default event that is generated when the user clicks the PictureBox POINTS: 1 REFERENCES: Using CheckBox and RadioButton Objects QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.12.07 - Add a PictureBox to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

46. Explain the selection options that can be controlled by setting the SelectionMode property of a ListBox. ANSWER: With a ListBox, you allow the user to make a single selection or multiple selections by setting the SelectionMode property appropriately. For example, when the SelectionMode property is set to One, the user can make only a single selection from the ListBox. When the SelectionMode is set to MultiExtended, pressing Shift and clicking the mouse or pressing Shift and one of the arrow keys (up, down, left, or right) extends the selection to span from the previously selected item to the current item. Pressing Ctrl and clicking the mouse selects or deselects an item in the list. When the SelectionMode is set to MultiSimple, multiple items can be selected by clicking the mouse or pressing the spacebar. When the SelectionMode is set to None, no items can be selected.

POINTS: 1 REFERENCES: Adding ListBox, CheckedListBox, and ComboBox Controls to a Form QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.12.08 - Add ListBox, ComboBox, and CheckedListBox items to a Form DATE CREATED: 5/16/2017 12:59 PM Copyright Cengage Learning. Powered by Cognero.

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47. SelectionStart and SelectionEnd are properties of the MonthCalendar class. What methods can be applied to these properties to control the display of a date? What other factors influence the format in which dates are displayed?

ANSWER: Several useful methods can be applied to the SelectionStart and SelectionEnd properties of MonthCalendar, including the following: * ToShortDateString(), which displays the date in the format of 2/16/2021 * ToLongDateString(), which displays the date in the format of Sunday, February 16, 2016 The format in which dates are displayed also depends on the operating system's regional settings. For example, using United Kingdom settings, the short string format would use the day first, followed by the month, as in 16/02/2021. The examples above assume United States settings.

POINTS: 1 REFERENCES: Adding MonthCalendar and DateTimePicker Controls to a Form QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.12.09 - Add a MonthCalendar and DateTimePicker to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

48. What are some of the methods that you can use with the SelectionStart and SelectionEnd properties of MonthCalendar to calculate new dates? For example, if you wanted to calculate the date of an event that will occur 10 days from the SelectionStart date, what MonthCalendar method could you use?

ANSWER: You can use several useful methods with the SelectionStart and SelectionEnd properties of MonthCalendar to calculate new dates, including the following: * AddDays(), which takes a double argument and adds a specified number of days to the date * AddMonths(), which takes an int argument and adds a specified number of months to the date * AddYears(), which takes an int argument and adds a specified number of years to the date Many business and financial applications use AddDays(), AddMonths(), and AddYears() to calculate dates for events, such as payment for a bill. To calculate the date of an event that should occur 10 days from the SelectionStart date, you could use the AddDays() method as in: myMonthCalendar.SelectionStart.AddDays(10).

POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Adding MonthCalendar and DateTimePicker Controls to a Form Subjective Short Answer False

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STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.12.09 - Add a MonthCalendar and DateTimePicker to a Form DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

49. When working with a Form in the IDE, how do you place new Controls on the Form, and how can you adjust them precisely to align with existing Controls?

ANSWER: When you place Controls on a Form in the IDE, you can drag them to any location to achieve the effect you want. When you drag multiple Controls onto a Form, blue snap lines appear and help you align new Controls with others already in place. Snap lines also appear when you place a Control closer to the edge of a container than is recommended. You also can use the Location property in a Control's Properties list to specify a location.

POINTS: 1 REFERENCES: Working with a Form's Layout QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.12.10 - Work with a Form’s layout DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

50. What are the similarities and differences between using a GroupBox and using a Panel to group related Controls on a Form?

ANSWER: Many types of ContainerControls are available to hold Controls. For example, you can use a GroupBox or Panel to group related Controls on a Form. When you move a GroupBox or Panel, all of its Controls are moved as a group. To create either of these Controls, you drag it from the Toolbox in the IDE, and then drag the Controls you want on top of it. GroupBoxes can display a caption, but Panels cannot. Panels can include a scroll bar that the user can manipulate to view Controls; GroupBoxes do not have scroll bars. You can anchor or dock Controls inside a GroupBox or Panel, and you can anchor or dock a GroupBox or Panel inside a Form. Doing this provides Control groups that can be arranged easily.

POINTS: 1 REFERENCES: Working with a Form's Layout QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.12.10 - Work with a Form’s layout DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:02 PM

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1. The code generated in Design mode in the IDE is not meant to be altered by typing. You should modify Control properties through the Properties window in the IDE. a. True b. False ANSWER: FEEDBACK:

True Correct. You should modify Control properties through the Properties window in the IDE, not by typing in the Designer.cs file.

Incorrect Incorrect. You should modify Control properties through the Properties window in the IDE, not by typing in the Designer.cs file.

Correct

POINTS: 1 REFERENCES: Event Handling QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.01 - Describe event handling DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

2. Any delegate can encapsulate any method that has the same return type and parameter list as the delegate. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. A delegate is an object that contains a reference to a method; objectoriented programmers would say that a delegate encapsulates a method. Any delegate can encapsulate any method that has the same return type and parameter list.

Incorrect Incorrect. A delegate is an object that contains a reference to a method; objectoriented programmers would say that a delegate encapsulates a method. Any delegate can encapsulate any method that has the same return type and parameter list.

POINTS: 1 REFERENCES: Understanding Delegates QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.02 - Describe delegates DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

3. Events must be declared as private. a. True b. False ANSWER: FEEDBACK:

False Correct. Events are declared as public, which is conventional, but you can use any accessibility modifier.

Incorrect Incorrect. Events are declared as public, which is conventional, but you can use Correct

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any accessibility modifier.

POINTS: 1 REFERENCES: Declaring and Using Both Custom and Built-in Event Handlers QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.03 - Declare and use both custom and built-in event handlers DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

4. The C# language requires that every event must use a delegate type with three parameters. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. The delegate type for an event should take exactly two parameters: a parameter indicating the source of the event and an EventArgs parameter that encapsulates any additional information about the event.

Incorrect Incorrect. The delegate type for an event should take exactly two parameters: a parameter indicating the source of the event and an EventArgs parameter that encapsulates any additional information about the event.

POINTS: 1 REFERENCES: Declaring and Using Both Custom and Built-in Event Handlers QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.03 - Declare and use both custom and built-in event handlers DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

5. When an event occurs, any delegate that a client has given or passed to the event is invoked. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. Invoked is another word for called. When an even occurs, any delegate that a client has given or passed to is called.

Incorrect Incorrect. Invoked is another word for called. When an even occurs, any delegate that a client has given or passed to is called.

POINTS: 1 REFERENCES: Declaring and Using Both Custom and Built-in Event Handlers QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.02 - Describe delegates DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

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6. In C#, when something interesting happens to an object, what is said to have occurred? a. an error b. an event c. a memory dump d. a method callback ANSWER: FEEDBACK:

b

a. Incorrect. An error is an unusual condition. b. Correct. An event is a reaction to an occurrence in a program. c. Incorrect. A memory dump occurs when the contents of RAM are copied into a file for review. Memory dumps often occur when the system encounters errors. d. Incorrect. A method callback, or callback method, is a method that gets invoked when an event occurs.

POINTS: 1 REFERENCES: Event Handling QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.01 - Describe event handling DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

7. What is another term for the performing of an action, such as the click of a button by a user? a. raising an event b. closing a loop c. deleting an instance d. chaining an action ANSWER: FEEDBACK:

a

a. Correct. A button click raises an event, fires an event, or triggers an event. b. Incorrect. The phrase closing a loop may refer to using a curly brace to close a loop block. c. Incorrect. The phrase deleting an instance may refer to a destructor method, which you require when an instance of a class (object) is destroyed. d. Incorrect. The phrase chaining an action describes the ability to define multiple actions into a sequence.

POINTS: 1 REFERENCES: Event Handling QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.01 - Describe event handling DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

8. What term can be used to describe an event-handler method? a. event source Copyright Cengage Learning. Powered by Cognero.

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b. event sender c. sender object d. event receiver ANSWER: FEEDBACK:

d

a. Incorrect. The software that logs the event is the event source. b. Incorrect. The object that generates an event is an event sender. c. Incorrect. This is a colloquial term describing the event sender. d. Correct. The event-handling method is also known as an event receiver.

POINTS: 1 REFERENCES: Event Handling QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.01 - Describe event handling DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

9. In a button event-handler parameter list, the second argument is an object of what type? a. MouseEventArgs b. KeyEventArgs c. EventArgs d. KeyPressEventArgs ANSWER: FEEDBACK:

c

a. Incorrect. MouseEventArgs is a class descended from EventArgs and is the second parameter in a mouse event handler. b. Incorrect. KeyEventArgs is a class descended from EventArgs and is the second parameter in a keyboard event handler. KeyEventArgs differs from KeyPressEventArgs by including information such as helper keys or modifier keys. c. Correct. The first parameter indicates the source of the event, and the EventArgs parameter encapsulates any additional information about the event. d. Incorrect. KeyPressEventArgs is a class descended from EventArgs and is the second parameter in a keyboard event handler.

KeyPressEventArgs differs from KeyEventArgs because it does not include information such as helper keys or modifier keys.

POINTS: 1 REFERENCES: Event Handling QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.01 - Describe event handling DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM Copyright Cengage Learning. Powered by Cognero.

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10. What file can be opened to examine all the code generated by the Windows Form Designer for an application that creates a Form? a. Designer.cs b. EventHandlers.cs c. Project.cs d. Form.cs ANSWER: FEEDBACK:

a

a. Correct. When you open the Designer.cs file in the IDE, you can examine all the code generated for the application that creates the Form. b. Incorrect. There is no such file as EventHandlers.cs. c. Incorrect. There is no such file as Project.cs. This is likely a confusion of the Program.cs file. d. Incorrect. The Form.cs is a confusion of the Form1.cs, which contains automatically generated code and is where you write code describing the tasks you will assign to controls in your application.

POINTS: 1 REFERENCES: Event Handling QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.01 - Describe event handling DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

11. A C# delegate is similar to what variable type in C++ that holds a method's memory address? a. object pointer b. integer pointer c. function pointer d. reference pointer ANSWER: FEEDBACK:

c

a. Incorrect. An object pointer holds the memory address of an object. b. Incorrect. An integer pointer holds the memory address of a variable of type int. c. Correct. In C++, a function pointer is a variable that holds a method’s memory

address. It is used to pass a method’s address to another method using a pointer variable. d. Incorrect. Reference pointer is incorrect terminology that likely comes from confusion between a reference and a pointer. Reference is another name, or alias, given to an object. A pointer holds the memory address of that object.

POINTS: 1 REFERENCES: Understanding Delegates QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.02 - Describe delegates DATE CREATED: 5/16/2017 12:59 PM Copyright Cengage Learning. Powered by Cognero.

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12. What keyword can be used to declare a delegate? a. handler b. function c. pointer d. delegate ANSWER: FEEDBACK:

d

a. Incorrect. handler is not a keyword in C#. b. Incorrect. function is not a keyword in C#. c. Incorrect. pointer is not a keyword in C#. d. Correct. A delegate is an object that contains a reference to a method. It is declared using the keyword delegate.

POINTS: 1 REFERENCES: Understanding Delegates QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.02 - Describe delegates DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

13. What class has a static field named Empty that represents an event that contains no event data? a. delegate b. EventArgs c. EventHandler d. MouseArgs ANSWER: FEEDBACK:

b

a. Incorrect. A delegate is an object that contains a reference to a method. b. Correct. An EventArgs object contains event information. You can use the EventArgs class static field named Empty, which represents an event that contains no event data. c. Incorrect. EventHandler is a predefined delegate type for events that do not use additional information. d. Incorrect. MouseArgs is a confusion of MouseEventArgs, which is a class descended from EventArgs that is used to handle mouse events.

POINTS: 1 REFERENCES: Declaring and Using Both Custom and Built-in Event Handlers QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.03 - Declare and use both custom and built-in event handlers DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM Copyright Cengage Learning. Powered by Cognero.

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14. What is used to declare your own event in C#? a. handlers b. trigger objects c. delegates d. raisers ANSWER: FEEDBACK:

c

a. Incorrect. A handler, or more specifically event handler, is a method that performs a task in response to an event. b. Incorrect. Trigger objects are objects that are used to fire an event. A trigger object contains setters, enter and exit actions. c. Correct. A delegate is an object that contains a reference to a method. To declare your own event, use a delegate and associate it with the method that should execute when the event occurs.

d. Incorrect. Raisers is an undefined term.

POINTS: 1 REFERENCES: Declaring and Using Both Custom and Built-in Event Handlers QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.03 - Declare and use both custom and built-in event handlers DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

15. What provides a way for the clients of a class to dictate methods that should execute when an event occurs? a. a handler b. an event c. a delegate d. a trigger ANSWER: FEEDBACK:

b

a. Incorrect. An event handler is a method that performs a task in response to an event. b. Correct. An event is a reaction to an occurrence in a program.

c. Incorrect. A delegate is an object that contains a reference to a method. d. Incorrect. A trigger is an occurrence in a program that generates an event.

POINTS: 1 REFERENCES: Declaring and Using Both Custom and Built-in Event Handlers QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.03 - Declare and use both custom and built-in event handlers DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

16. For events that do not use additional information, the .NET Framework has already defined an appropriate delegate type with what name?

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a. EventArgs b. EventTrigger c. EventPush d. EventHandler ANSWER: FEEDBACK:

d

a. Incorrect. An EventArgs object contains event information. You can use the EventArgs class static field named Empty, which represents an event that contains no event data. b. Incorrect. The EventTrigger class represents a trigger that applies a set of actions on the occurrence of an event. c. Incorrect. EventPush is not a defined delegate type.

d. Correct. EventHandler is a predefined delegate type for events that do not use additional information.

POINTS: 1 REFERENCES: Declaring and Using Both Custom and Built-in Event Handlers QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.03 - Declare and use both custom and built-in event handlers DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

17. When you double-click a Button on a Form in the IDE, you automatically generate the shell of what method? a. Click() b. Double_Click() c. Enter() d. Focus() ANSWER: FEEDBACK:

a

a. Correct. When using the IDE to create event-handling methods, double-clicking on the Button on the Form generates a shell of Click(). b. Incorrect. The click event is raised when a Button is clicked. When you add a button that responds to a click event, you will begin with a shell of the Click() event. c. Incorrect. In this situation you are using the IDE to create event-handling methods, and the enter event would not be raised when a Button is clicked. d. Incorrect. In this situation you are using the IDE to create event-handling methods, and the focus event would not be raised when a Button is clicked.

POINTS: 1 REFERENCES: Handling Control Component Events QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.04 - Handle Control component events DATE CREATED: 5/16/2017 12:59 PM Copyright Cengage Learning. Powered by Cognero.

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18. Mouse events can be handled for any control through an object of what class? a. MouseEvent b. MouseEventArgs c. MousePressEventArgs d. MousePressArgs ANSWER: FEEDBACK:

b

a. Incorrect. There is no MouseEvent class. Mouse events include all the actions a user takes with a mouse, including clicking, pointing, and dragging. b. Correct. Mouse events include all the actions a user takes with a mouse, including clicking, pointing, and dragging. Mouse events can be handled for any Control through an object of the class MouseEventArgs, which descends from EventArgs. c. Incorrect. There is no MousePressEventArgs class. Mouse events include all the actions a user takes with a mouse, including clicking, pointing, and dragging. d. Incorrect. There is no MousePressArgs class. Mouse events include all the actions a user takes with a mouse, including clicking, pointing, and dragging.

POINTS: 1 REFERENCES: Handling Mouse and Keyboard Events QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.05 - Handle mouse and keyboard events DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/20/2019 1:31 PM

19. What event occurs when the user clicks the mouse within the Control's boundaries? a. MouseClick b. MouseEnter c. MouseHover d. MouseLeave ANSWER: FEEDBACK:

a

POINTS:

1

a. Correct. The mouse event MouseClick occurs when the user clicks the mouse within the Control’s boundaries. b. Incorrect. The mouse event MouseEnter occurs when the mouse cursor enters the Control’s boundaries. c. Incorrect. The mouse event MouseHover occurs when the mouse cursor is within the Control’s boundaries. d. Incorrect. The mouse event MouseLeave occurs when the mouse cursor leaves the Control’s boundaries.

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REFERENCES: Handling Mouse and Keyboard Events QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.05 - Handle mouse and keyboard events DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

20. What event occurs when the mouse cursor leaves the Control's boundaries? a. MouseClick b. MouseEnter c. MouseHover d. MouseLeave ANSWER: FEEDBACK:

d

a. Incorrect. The mouse event MouseClick occurs when the user clicks the mouse within the Control’s boundaries. b. Incorrect. The mouse event MouseEnter occurs when the mouse cursor enters the Control’s boundaries. c. Incorrect. The mouse event MouseHover occurs when the mouse cursor is within the Control’s boundaries. d. Correct. The mouse event MouseLeave occurs when the mouse cursor leaves the Control’s boundaries.

POINTS: 1 REFERENCES: Handling Mouse and Keyboard Events QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.05 - Handle mouse and keyboard events DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

21. What event occurs when a mouse button is released while the mouse is within the Control's boundaries? a. MouseClick b. MouseHover c. MouseUp d. MouseMove ANSWER: FEEDBACK:

c

a. Incorrect. The mouse event MouseClick occurs when the user clicks the mouse within the Control’s boundaries. b. Incorrect. The mouse event MouseHover occurs when the mouse cursor is within the Control’s boundaries. c. Correct. The mouse event MouseUp occurs when a mouse button is released while the mouse is within the Control’s boundaries. d. Incorrect. The mouse event MouseMove occurs when the mouse is moved

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while within the Control’s boundaries.

POINTS: 1 REFERENCES: Handling Mouse and Keyboard Events QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.05 - Handle mouse and keyboard events DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

22. An event that occurs as a result of interaction with the keyboard is known as what type of event? a. key events b. external events c. input events d. console events ANSWER: FEEDBACK:

a

a. Correct. Keyboard events, also known as key events, occur when a user presses and releases keyboard keys. b. Incorrect. External events do not result from interactions with the keyboard.

External events are often events triggered by the operating system. c. Incorrect. This may seem like a reasonable choice, but an input event specifically involves text input. d. Incorrect. A console event includes logging in, logging off, or engaging in navigation.

POINTS: 1 REFERENCES: Handling Mouse and Keyboard Events QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.05 - Handle mouse and keyboard events DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

23. What property stores the key code along with any modifier key for a key event? a. KeyCode b. KeyValue c. KeyData d. KeyStatus ANSWER: FEEDBACK:

c

a. Incorrect. KeyCode returns the code for the key. b. Incorrect. KeyValue returns a numeric representation of the key (this number is known as the Windows virtual key code). c. Correct. KeyData returns the key code along with any modifier key.

d. Incorrect. KeyStatus is an undefined property.

POINTS:

1

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REFERENCES: Handling Mouse and Keyboard Events QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.05 - Handle mouse and keyboard events DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

24. Depending on the event, the delegate used to create the keyboard event handler is either KeyEventHandler or what other event handler? a. PressEventHandler b. EventHandler c. KeyPressHandler d. KeyPressEventHandler ANSWER: FEEDBACK:

d

a. Incorrect. PressEventHandler is an undefined delegate. b. Incorrect. EventHandler is a predefined delegate type for events that do not use additional information. c. Incorrect. KeyPressHandler is an undefined delegate. d. Correct. Depending on the event, the delegate used to create the keyboard event handler is either KeyPressEventHandler or KeyEventHandler.

POINTS: 1 REFERENCES: Handling Mouse and Keyboard Events QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.05 - Handle mouse and keyboard events DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

25. When users encounter multiple GUI Controls on a Form, and a user presses the Enter key, what usually happens? a. The Form will check the default key action for the enter key in the Designer.cs file. b. The Control that has focus will raise an event. c. The Control that is closest to the mouse pointer will be activated. d. Nothing will happen unless the enter key has a KeyPressHandler event defined.

ANSWER: FEEDBACK:

b

a. Incorrect. The Designer.cs file contains the declaration and initialization of form layout and Controls. b. Correct. When Forms contain multiple Controls, you often want one to have focus. Focus is the property of a Control that causes an event to be raised when the user presses Enter. c. Incorrect. Although this seems like a reasonable choice, the mouse may be used to change which Control has focus. Focus is not given to a Control merely by its proximity to the mouse pointer.

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d. Incorrect. KeyPressHandler is an undefined delegate.

POINTS: 1 REFERENCES: Managing Multiple Controls QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.06 - Manage multiple Controls DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

26. What Boolean property of a Control identifies whether the Control will serve as a stopping place in a sequence of Tab key presses? a. TabIndex b. TabCount c. TabStop d. TabFlag ANSWER: FEEDBACK:

c

a. Incorrect. TabIndex is a numeric property that indicates the order in which the Control will receive focus when the user presses the Tab key. b. Incorrect. TabCount is an undefined property. c. Correct. TabStop is a Boolean property of a Control that identifies whether the Control will serve as a place that will receive focus in a sequence of Tab key presses. d. Incorrect. TabFlag is an undefined property.

POINTS: 1 REFERENCES: Managing Multiple Controls QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.06 - Manage multiple Controls DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

27. The connection of an event to its resulting actions is known by what term? a. event wiring b. event triggering c. event watching d. event connecting ANSWER: FEEDBACK:

a

a. Correct. Event wiring is the act of connecting an event to its resulting actions. b. Incorrect. Event triggering is an undefined term but appears to be a colloquial phrase describing an action that raises an event. c. Incorrect. Event watching is an undefined term.

d. Incorrect. Event connecting is an undefined term. It is likely a confusion of event Copyright Cengage Learning. Powered by Cognero.

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wiring.

POINTS: 1 REFERENCES: Event Handling QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.01 - Describe event handling DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

28. For static methods, what does a delegate object encapsulate? a. The class utilized by the methods. b. The arguments passed to the methods. c. The method to be called. d. Custom events defined within the methods.

ANSWER: FEEDBACK:

c

a. Incorrect. A delegate encapsulates a method, not a class. b. Incorrect. A delegate encapsulates a method, not just the arguments. Any delegate can encapsulate any method that has the same return type and parameter list as the delegate. c. Correct. Encapsulating is the technique of packaging an object’s attributes and methods into a cohesive unit. A delegate encapsulates a method. d. Incorrect. A delegate encapsulates a method.

POINTS: 1 REFERENCES: Understanding Delegates QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.02 - Describe delegates DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

29. What happens when the TabIndex values of two or more Controls is set to 0? a. An Exception is thrown, and the program ends. b. No errors are generated, but only one Control will receive focus. c. After setting one Control to 0, the other Control will be forced to a 1 or other unique number. d. Both Controls will receive focus at the same time.

ANSWER: FEEDBACK:

b

a. Incorrect. TabIndex is a numeric property that indicates the order in which the Control will receive focus when the user presses the Tab key. Programmers typically use small numbers, beginning with 0. An exception will not be thrown. b. Correct. Setting the TabIndex values of two or more Controls to 0 does not cause an error. Only one Control will receive focus.

c. Incorrect. TabIndex is a numeric property that indicates the order in which the Control will receive focus when the user presses the Tab key. Setting the Copyright Cengage Learning. Powered by Cognero.

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TabIndex values of two or more Controls to 0 does not cause an error.

Only one Control will receive focus. d. Incorrect. Setting the TabIndex values of two or more Controls to 0 means that only one Control will receive focus.

POINTS: 1 REFERENCES: Managing Multiple Controls QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.06 - Manage multiple Controls DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/22/2019 4:20 PM

30. What expression describes the act of calling an event method? a. cascading the event b. revoking the event c. invoking the event d. composing the event ANSWER: FEEDBACK:

c

a. Incorrect. Cascading the event is an undefined term. In programming, cascading refers to method cascading to allow multiple methods to be called on the same object, or window cascading, where multiple GUI windows are placed in a specific arrangement to ensure that all title bars are visible to the user. b. Incorrect. Revoking the event is an undefined term in computer programming.

Revoke means to call back or remove. c. Correct. Invoking the event occurs when you call an event method.

d. Incorrect. Composing the event is an undefined term in computer programming.

Compose means to write or create.

POINTS: 1 REFERENCES: Declaring and Using Both Custom and Built-in Event Handlers QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.03 - Declare and use both custom and built-in event handlers DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/20/2019 1:42 PM

Match each item with a statement below. a. event b. event receiver c. event sender d. Click event e. encapsulation f. composed delegate g. Empty Copyright Cengage Learning. Powered by Cognero.

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h. Events icon i. MouseEventHandler j. focus REFERENCES: Glossary QUESTION TYPE: Matching HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.01 - Describe event handling MVC#.FARR.18.13.02 - Describe delegates MVC#.FARR.18.13.03 - Declare and use both custom and built-in event handlers MVC#.FARR.18.13.04 - Handle Control component events MVC#.FARR.18.13.05 - Handle mouse and keyboard events MVC#.FARR.18.13.06 - Manage multiple Controls DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

31. Used to notify an object's client of a change that has occurred in the object.

ANSWER: a POINTS: 1

32. Also known as an event-handler method.

ANSWER: b POINTS: 1

33. The control that generates an event.

ANSWER: c POINTS: 1

34. Generated when a Button object is clicked.

ANSWER: d POINTS: 1

35. The technique of packaging an object's attributes and methods into a cohesive unit that can then be used as an undivided entity ANSWER: e POINTS: 1

36. A type of delegate that lets you invoke multiple method calls using a single statement ANSWER: f POINTS: 1

37. Represents an event that contains no event data ANSWER: g POINTS: 1

38. Shown in the Properties window of the IDE, and looks like a lightning bolt ANSWER: h Copyright Cengage Learning. Powered by Cognero.

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POINTS: 1

39. A delegate used to create mouse event handlers ANSWER: i POINTS: 1

40. The property of a Control that causes an event to be raised when the user presses Enter.

ANSWER: j POINTS: 1

41. What is the relationship between an event sender and event receiver?

ANSWER: The object that generates an event, such as a Button, is an event sender. The eventhandling method is also known as an event receiver. The first parameter in the list for the event receiver method is an object named sender. It is a reference to the object that generated the event.

POINTS: 1 REFERENCES: Event Handling QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.13.01 - Describe event handling DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

42. Describe the methods that could be encapsulated by a delegate that has been defined as: delegate void GreetingDelegate(string s); ANSWER: The GreetingDelegate shown can encapsulate any method as long as it has a void return type and a single string parameter. Any delegate can encapsulate any method that has the same return type and parameter list as the delegate. If you declare the delegate and then write a method with the same return type and parameter list, you can assign an instance of the delegate to represent it.

POINTS: 1 REFERENCES: Understanding Delegates QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.13.02 - Describe delegates DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

43. Assume you declare three delegates named delegate1, delegate2, and delegate3. You then assign a reference to method M1() to delegate1, and a reference to method M2() to delegate2. How do you make delegate3 into a composed delegate that executes both M1() and M2()? What are the rules concerning return type and parameter list for composed delegates?

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When the statement delegate3 = delegate1 + delegate2 executes, delegate3 becomes a delegate that executes both M1() and M2(), in that order.

Only delegates with the same parameter list can be composed, and the delegates used must have a void return type.

POINTS: 1 REFERENCES: Understanding Delegates QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.13.02 - Describe delegates DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

44. When you define your own event-handler delegate, what arguments are required? Provide an example of a delegate declaration.

ANSWER: Just like the event handlers automatically created in the IDE, each of your own event handler delegates requires two arguments: the object where the event was initiated (the sender), and an EventArgs argument. You can create an EventArgs object that contains event information, or you can use the EventArgs class static field named Empty, which represents an event that contains no event data. In other words, using the EventArgs.Empty field simply tells the client that an event has occurred, without specifying details. For example, you can declare a delegate event handler named ChangedEventHandler as follows: public delegate void MyEventHandler (object sender, EventArgs e); POINTS: 1 REFERENCES: Declaring and Using Both Custom and Built-in Event Handlers QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.13.03 - Declare and use both custom and built-in event handlers DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

45. What are the two actions that can be taken on an event field?

ANSWER: You can take only two actions on an event: You can compose a new delegate onto an event using the += operator, and you can remove a delegate from it using the -= operator.

POINTS: 1 REFERENCES: Declaring and Using Both Custom and Built-in Event Handlers QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.13.03 - Declare and use both custom and built-in event handlers Copyright Cengage Learning. Powered by Cognero.

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46. Given a GUI Control, what objects and delegates are provided to handle mouse events such as clicking, pointing, and dragging?

ANSWER: Mouse events include all the actions a user takes with a mouse, including clicking, pointing, and dragging. Mouse events can be handled for any Control through an object of the class MouseEventArgs. The delegate used to create mouse event handlers is MouseEventHandler. Every mouse event-handling method must have two parameters: an object representing the sender, and an object representing the event. Depending on the event, the type of the second parameter is EventArgs or MouseEventArgs.

POINTS: 1 REFERENCES: Handling Mouse and Keyboard Events QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.13.05 - Handle mouse and keyboard events DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

47. What are the properties of the MouseEventArgs class?

ANSWER: See the table below: MouseEventArgs PropertyDescription ButtonSpecifies which mouse button triggered the event; the value can be Left, Right, Middle, or none ClicksSpecifies the number of times the mouse was clicked XThe x-coordinate where the event occurred on the control that generated the event YThe y-coordinate where the event occurred on the control that generated the event POINTS: 1 REFERENCES: Handling Mouse and Keyboard Events QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.13.05 - Handle mouse and keyboard events DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

48. What are common keyboard events? What is the delegate used to create a keyboard event handler, and what is the type of the second parameter to the event handler?

ANSWER: Keyboard events, also known as key events, occur when a user presses and releases keyboard keys. Some common keyboard events are KeyDown, KeyUp, and KeyPress. Similar to the way mouse events work, every keyboard event-handling method must have two parameters. Depending on the event, the delegate used to Copyright Cengage Learning. Powered by Cognero.

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create the keyboard event handler is either KeyEventHandler or KeyPressHandler, and the type of the second parameter is KeyEventArgs or KeyPressEventArgs.

POINTS: 1 REFERENCES: Handling Mouse and Keyboard Events QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.13.05 - Handle mouse and keyboard events DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

49. What is an important difference between KeyEventArgs properties and KeyPressEventArgs properties?

ANSWER: An important difference is that KeyEventArgs objects include data about helper keys or modifier keys that are pressed with another key. For example, if you need to distinguish between a user pressing A and pressing Alt+A in your application, then you must use a keyboard event that uses an argument of type KeyEventArgs.

POINTS: 1 REFERENCES: Handling Mouse and Keyboard Events QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.13.05 - Handle mouse and keyboard events DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

50. When a Form contains multiple Controls, you can create a separate event handler for each Control.

However, you can also associate the same event handler with multiple Controls. Describe how to associate an existing event handler with a second Control using the IDE. ANSWER: Suppose you create a Form that contains two Buttons. In the IDE, you can doubleclick the first Button and create an associated method such as button1_Click(object sender, EventArgs e). If you click the second Button so its properties are displayed in the IDE's Properties list, you can click the Events icon to see a list of events associated with this Button. If no Click event has been chosen yet, a list box is available. This list contains all the existing events that have the correct signature to be the event handler for the event. Because the button1_Click() handler can also handle a button2_Click event, you can select it as the event for button2. (Note that in Visual Studio 2019, the Click() methods will both start with an uppercase B.) POINTS: REFERENCES: QUESTION TYPE: HAS VARIABLES:

1 Managing Multiple Controls Subjective Short Answer False

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STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.13.06 - Manage multiple Controls DATE CREATED: 5/16/2017 12:59 PM DATE MODIFIED: 11/15/2019 4:04 PM

51. When you click a component on a Form in Design View, you move to the default method code. a. True b. False ANSWER: FEEDBACK:

False Correct. When you double-click a component on a Form in Design View, you move to the default method code. By clicking, you remain in Design View, and the correct set of properties appears in the Properties list.

Incorrect Incorrect. When you double-click a component on a Form in Design View, you move to the default method code. By clicking, you remain in Design View, and the correct set of properties appears in the Properties list.

Correct

POINTS: 1 QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.13.07 - Continue your exploration of Controls and events DATE CREATED: 10/29/2019 10:52 AM DATE MODIFIED: 11/15/2019 4:04 PM

1. Files are used to store data on nonvolatile memory. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. Permanent storage is not lost when a computer loses power; it is nonvolatile. A computer file is a collection of data stored on a nonvolatile device in a computer system.

Incorrect Incorrect. Permanent storage is not lost when a computer loses power; it is nonvolatile. A computer file is a collection of data stored on a nonvolatile device in a computer system.

POINTS: 1 REFERENCES: Files and Streams QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

2. When you write a program and save it to a disk, you are using temporary storage. a. True b. False Copyright Cengage Learning. Powered by Cognero.

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False Correct

Correct. When you write a program and save it to a disk, you are using permanent storage.

Incorrect Incorrect. When you write a program and save it to a disk, you are using permanent storage.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

3. The terms directory and folder are used synonymously to refer to an entity that is used to organize files. a. True b. False ANSWER: FEEDBACK:

True Correct

Correct. The terms directory and folder are used synonymously to mean an entity that is used to organize files.

Incorrect Incorrect. The terms directory and folder are used synonymously to mean an entity that is used to organize files.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/20/2019 9:25 AM

4. The File class is contained in the System.IOFile namespace. a. True b. False ANSWER: FEEDBACK:

False Correct

Correct. The File class is contained in the System.IO namespace.

Incorrect Incorrect. The File class is contained in the System.IO namespace.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/18/2019 11:55 AM Copyright Cengage Learning. Powered by Cognero.

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5. A CSV file contains values separated by semicolon delimiters. a. True b. False ANSWER: FEEDBACK:

False Correct Correct. A file that contains comma-separated values is often called a CSV file.

Incorrect Incorrect. A file that contains comma-separated values is often called a CSV file.

POINTS: 1 REFERENCES: Writing and Reading a Sequential Access File QUESTION TYPE: True / False HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.04 - Write to and read from a sequential access text file DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

6. When you write a C# program that stores a value in a variable, you are using temporary storage; the value you store is lost when the program ends or the computer loses power. What is the name for this kind of storage? a. volatile b. nonvolatile c. permanent d. hard ANSWER: FEEDBACK:

a

a. Correct. Volatile describes storage in which data is lost when power is interrupted. b. Incorrect. Nonvolatile storage is permanent storage; data is not lost when a computer loses power. c. Incorrect. Permanent storage devices, such as hard disks, USB drives, reels of magnetic tape, and optical discs, are used to store files. d. Incorrect. Hard storage is not a kind of storage; a hard disk is a form of permanent storage.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/20/2019 9:27 AM

7. Permanent storage that does not lose contents when a computer loses power is known as what type of storage? a. volatile b. temporal c. nonvolatile d. soft storage Copyright Cengage Learning. Powered by Cognero.

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c

a. Incorrect. Volatile describes storage in which data is lost when power is interrupted. b. Incorrect. Temporal storage is not a type of storage.

c. Correct. Nonvolatile storage is permanent storage; data is not lost when a computer loses power. d. Incorrect. Soft storage is not a type of storage.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/20/2019 9:28 AM

8. Files exist on devices such as hard disks, USB drives, reels of magnetic tape, and optical discs. What are these files considered to be? a. temporary files b. volatile files c. soft files d. permanent files ANSWER: FEEDBACK:

d

a. Incorrect. Random access memory (RAM) is temporary storage in a computer. b. Incorrect. Volatile describes storage in which data is lost when power is interrupted. c. Incorrect. There are no files that are considered soft.

d. Correct. Permanent storage devices, such as hard disks, USB drives, reels of magnetic tape, and optical discs, are used to store files.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/20/2019 9:28 AM

9. What format is used by files that store music or images? a. data b. binary c. text d. information ANSWER:

b

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a. Incorrect. Data files contain facts and figures. b. Correct. Binary files contain data that has been encoded in binary format. c. Incorrect. Text files contain data that can be read in a text editor because the data has been encoded using a scheme such as ASCII or Unicode. d. Incorrect. A computer file is a collection of information stored on a nonvolatile device in a computer system.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

10. When you store data in a computer file on a persistent storage device, what are you doing? a. You are reading from the file. b. You are using an input stream. c. You are writing to the file. d. You are flashing the data to memory.

ANSWER: FEEDBACK:

c

a. Incorrect. To read from a file is to copy data from a file on a storage device into RAM. b. Incorrect. When you perform an input operation in an application, you can picture bytes flowing into your program from an input device through a stream. c. Correct. To write to a file is to store data in a computer file on a permanent storage device. d. Incorrect. Storing data in a computer file on a persistent storage device is not known as flashing the data to the memory.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

11. When you copy data from a file on a storage device into RAM, what are you doing? a. You are writing to the file. b. You are reading from the file. c. You are copying to the file. d. You are flashing the data to memory.

ANSWER: FEEDBACK:

b

a. Incorrect. To write to a file is to store data in a computer file on a permanent storage device.

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b. Correct. To read from a file is to copy data from a file on a storage device into RAM. c. Incorrect. When you copy data from a file on a storage device into RAM you are not copying to the file. d. Incorrect. When you copy data from a file on a storage device into RAM you are not flashing the data to memory.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

12. Due to the fact that data can be erased from files, what term do programmers generally prefer over permanent storage? a. volatile storage b. temporary storage c. transit storage d. persistent storage ANSWER: FEEDBACK:

d

a. Incorrect. Volatile describes storage in which data is lost when power is interrupted. b. Incorrect. Random access memory (RAM) is temporary storage in a computer.

c. Incorrect. Transit storage is not the term that programmers generally prefer over permanent storage. d. Correct. Because you can erase data from files, some programmers prefer the term persistent storage to permanent storage.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/20/2019 9:30 AM

13. Most computer users organize their files into directories, which are also known by what term? a. folders b. bins c. buckets d. drawers ANSWER: FEEDBACK:

a

a. Correct. Folders or directories are structures used to organize files on a storage device.

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b. Incorrect. Directories are not known as bins. c. Incorrect. Directories are not known as buckets. d. Incorrect. Directories are not known as drawers.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/20/2019 9:31 AM

14. What class contains methods that allow you to access information about files? a. Cabinet b. File c. Directory d. Folder ANSWER: FEEDBACK:

b

a. Incorrect. Cabinet is not a built-in class. b. Correct. The File class contains methods that allow you to access information about files. c. Incorrect. The Directory class provides you with information about directories or folders. d. Incorrect. Folder is not a built-in class.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/20/2019 9:32 AM

15. What class can be used to provide information on directories or folders? a. Directory b. File c. Cabinet d. Folder ANSWER: FEEDBACK:

a

a. Correct. The Directory class provides you with information about directories or folders. b. Incorrect. The File class contains methods that allow you to access information about files. c. Incorrect. Cabinet is not a class.

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d. Incorrect. Folder is not a class.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/20/2019 9:32 AM

16. What term describes any one of the letters, numbers, or other special symbols (such as punctuation marks) that comprise data. a. field b. record c. delimiter d. character ANSWER: FEEDBACK:

d

a. Incorrect. A field is a character or group of characters that have some meaning. b. Incorrect. A record is a collection of fields that contain data about an entity. c. Incorrect. A delimiter is a character used to specify the boundary between characters in text files. d. Correct. A character is any one of the letters, numbers, or other special symbols (such as punctuation marks) that constitute data.

POINTS: 1 REFERENCES: Understanding File Data Organization QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.02 - Describe file data organization DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

17. What is a collection of fields that contain data about an entity? a. a file b. a character c. a record d. a bit ANSWER: FEEDBACK:

c

a. Incorrect. A computer file is a collection of information stored on a nonvolatile device in a computer system. b. Incorrect. A character is any one of the letters, numbers, or other special symbols (such as punctuation marks) that constitute data. c. Correct. A record is a collection of fields that contain data about an entity.

d. Incorrect. A bit is a binary digit.

POINTS:

1

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REFERENCES: Understanding File Data Organization QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.02 - Describe file data organization DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

18. A data file is what type of file when each record is read in order of its position in the file? a. sequential access file b. random access file c. dynamic read file d. temporary buffer file ANSWER: FEEDBACK:

a

a. Correct. A sequential access file is a data file in which each record is read in order based on its position in the file. Usually the records are stored in order based on the value in some field. b. Incorrect. A random access file is one for which records can be accessed in any order. c. Incorrect. A dynamic read file is not a type of file.

d. Incorrect. A temporary buffer file is not a type of file.

POINTS: 1 REFERENCES: Understanding File Data Organization QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.02 - Describe file data organization DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

19. How does a C# application open a file? a. It opens a file by associating the file with a memory address. b. It opens a file by reading the contents into RAM and storing them internally as a string. c. It opens a file by creating an object and associating a stream of bytes with that object. d. It opens a file by reading each line of a file into an array.

ANSWER: FEEDBACK:

c

a. Incorrect. A C# application does not open a file by associating the file with a memory address. b. Incorrect. A C# application does not open a file by reading the contents into RAM and storing them internally as a string. c. Correct. Opening a file involves creating an object and associating a stream of bytes with it. d. Incorrect. A C# application does not open a file by reading each line of a file into an array.

POINTS: REFERENCES:

1 Understanding File Data Organization

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QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.02 - Describe file data organization DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

20. When a C# application is done using a file, what should it do with the file? a. It should delete the file. b. It should return the file to RAM. c. It should truncate the file. d. It should close the file.

ANSWER: FEEDBACK:

d

a. Incorrect. When a C# application is done using a file, it should not delete the file. b. Incorrect. When a C# application is done using a file, it should not return the file to RAM. c. Incorrect. When a C# application is done using a file, it should not truncate the file. d. Correct. When you finish using a file, the program should close the file—that is, make the file no longer available to your application.

POINTS: 1 REFERENCES: Understanding File Data Organization QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.02 - Describe file data organization DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

21. When you perform an input operation in an application, the bytes flowing into your program from an input device typically are pictured by programmers as what? a. A directory filling and emptying. b. A stream of information. c. A bucket filling with water. d. A chunk of information.

ANSWER: FEEDBACK:

b

a. Incorrect. When you perform an input operation in an application, the bytes flowing into your program from an input device are not typically pictured as a directory filling and emptying. b. Correct. When you perform an input operation in an application, you can picture the bytes flowing into your program from an input device as a stream, which functions as a pipeline or channel. c. Incorrect. When you perform an input operation in an application, the bytes flowing into your program from an input device are not typically pictured as a bucket filling with water. d. Incorrect. When you perform an input operation in an application, the bytes flowing into your program from an input device are not typically pictured as a

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chunk of information.

POINTS: 1 REFERENCES: Understanding Streams QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.03 - Describe streams DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/20/2019 9:34 AM

22. Hardcoding numbers (unnamed, literal constants) in code without explanation is a bad programming practice. What are these hardcoded numbers known as? a. constant issues b. token numbers c. magic numbers d. character sets ANSWER: FEEDBACK:

c

a. Incorrect. The hardcoded numbers are not known as constant issues. b. Incorrect. A token is a block of text within a string that represents an entity or field. c. Correct. The term magic number refers to the bad programming practice of hardcoding numbers in code without explanation. d. Incorrect. A character set is the group of all the characters used to represent data on a particular computer.

POINTS: 1 REFERENCES: Writing and Reading a Sequential Access File QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.04 - Write to and read from a sequential access text file DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/20/2019 9:35 AM

23. What method is a member of the String class and takes a character delimiter parameter and separates a string into substrings at each occurrence of the delimiter? a. Separate() b. Split() c. Delimit() d. Substring() ANSWER: FEEDBACK:

b

a. Incorrect. Separate() is not a built-in method. b. Correct. The Split() method is a member of the String class; it takes a character delimiter parameter and separates a string into substrings at each occurrence of the delimiter. c. Incorrect. Delimit() is not a built-in method.

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d. Incorrect. The Substring() method can be used to extract a portion of a string from a starting point for a specific length.

POINTS: 1 REFERENCES: Writing and Reading a Sequential Access File QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.04 - Write to and read from a sequential access text file DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/20/2019 9:36 AM

24. When a file is open in C#, what holds the byte number of the next byte to be read? a. the file token b. the file position pointer c. the magic number d. the record token ANSWER: FEEDBACK:

b

a. Incorrect. A token is a block of text within a string that represents an entity or field. b. Correct. A file’s file position pointer holds the byte number of the next byte to be read. c. Incorrect. The term magic number refers to the bad programming practice of hard-coding numbers in code without explanation. d. Incorrect. There are no record tokens in C#.

POINTS: 1 REFERENCES: Searching a Sequential Text File QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.05 - Search a sequential access text file DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/20/2019 9:37 AM

25. What is the process of converting objects into streams of bytes known as? a. deserialization b. normalization c. streaming d. serialization ANSWER: FEEDBACK:

d

a. Incorrect. Deserialization is the process of converting streams of bytes back into objects. b. Incorrect. Normalization is not the process of converting objects into streams of bytes. c. Incorrect. Streaming is not the process of converting objects into streams of bytes.

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d. Correct. Serialization is the process of converting objects into streams of bytes.

POINTS: 1 REFERENCES: Understanding Serialization and Deserialization QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.06 - Appreciate serialization and deserialization DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

26. What must be done in order to convert streams of bytes back into objects? a. deserialization b. serialization c. normalization d. denormalization ANSWER: FEEDBACK:

a

a. Correct. Deserialization is the process of converting streams of bytes back into objects. b. Incorrect. Serialization is the process of converting objects into streams of bytes.

c. Incorrect. Normalization is not the process of converting streams of bytes back into objects. d. Incorrect. Denormalization is not the process of converting streams of bytes back into objects.

POINTS: 1 REFERENCES: Understanding Serialization and Deserialization QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.06 - Appreciate serialization and deserialization DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

27. Approximately how many bytes are in a gigabyte? a. a thousand bytes b. a million bytes c. a billion bytes d. a trillion bytes ANSWER: FEEDBACK:

c

POINTS: REFERENCES:

1 Files and the File and Directory Classes

a. Incorrect. A kilobyte is approximately one thousand bytes. b. Incorrect. A megabyte is approximately one million bytes. c. Correct. A gigabyte is approximately one billion bytes. d. Incorrect. A terabyte is approximately one trillion bytes.

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QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

28. What Filestream property indicates whether the Filestream supports reading? a. ReadAccess b. CanRead c. CanSeek d. CanWrite ANSWER: FEEDBACK:

b

a. Incorrect. ReadAccess is not a Filestream property. b. Correct. CanRead gets a value that indicates whether or not the FileStream supports reading. c. Incorrect. CanSeek gets a value that indicates whether or not the FileStream supports seeking. d. Incorrect. CanWrite gets a value that indicates whether or not the FileStream supports writing.

POINTS: 1 REFERENCES: Understanding Streams QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.03 - Describe streams DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/18/2019 12:00 PM

29. What file mode is used to open an existing file, and empty the file once opened so that the file is zero bytes in size? a. Append b. Empty c. Truncate d. Destroy ANSWER: FEEDBACK:

c

a. Incorrect. Append opens the file if it exists and seeks the end of the file to append new data. b. Incorrect. Empty is not a file mode; instead it represents an event that contains no event data. c. Correct. Truncate opens an existing file, and once the file is opened, it is truncated so that its size is zero bytes. d. Incorrect. Destroy is not a file mode.

POINTS:

1

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REFERENCES: Understanding Streams QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.03 - Describe streams DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/18/2019 12:00 PM

30. If you attempt to open a file with the Open file mode, what happens if the file does not exist? a. The file is created and then opened for use. b. The program returns a prompt to the user asking if the file should be created. c. The program will return a null object, and all data written to the file will be discarded. d. The program throws a System.IO.FileNotFoundException error.

ANSWER: FEEDBACK:

d

a. Incorrect. If a file does not exist when an attempt to open a file with the Open file mode is made, the file is not created and then opened for use. b. Incorrect. If a file does not exist when an attempt to open a file with the Open file mode is made, the program does not return a prompt to the user that asks if the file should be created. c. Incorrect. If a file does not exist when an attempt to open a file with the Open file mode is made, the program will not return a null object and all data written to the file will not be discarded. d. Correct. Open opens an existing file, and if the file does not exist, a System.IO.FileNotFoundException is thrown.

POINTS: 1 REFERENCES: Understanding Streams QUESTION TYPE: Multiple Choice HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.03 - Describe streams DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/18/2019 12:01 PM

Match each item with a statement below.

Match each item with a statement below: a. permanent storage b. computer file c. binary files d. path e. random access file f. field g. key field h. delimiter i. token Copyright Cengage Learning. Powered by Cognero.

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j. random access memory REFERENCES: Glossary QUESTION TYPE: Matching HAS VARIABLES: False LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes MVC#.FARR.18.14.02 - Describe file data organization MVC#.FARR.18.14.04 - Write to and read from a sequential access text file DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

31. Data is not lost when a computer loses power.

ANSWER: a POINTS: 1

32. A collection of information stored on a nonvolatile device in a computer system.

ANSWER: b POINTS: 1

33. Store music, images, and executable programs.

ANSWER: c POINTS: 1

34. The combination of the disk drive plus the complete hierarchy of directories in which a file resides.

ANSWER: d POINTS: 1

35. A file in which records are not used in sequence.

ANSWER: e POINTS: 1

36. A character or group of characters that has some meaning.

ANSWER: f POINTS: 1

37. A field used to uniquely identify each record in a sequential file.

ANSWER: g POINTS: 1

38. A character used to specify the boundary between data items in text files ANSWER: h POINTS: 1

39. A block of text within a string that represents an entity or a field ANSWER: i POINTS: 1 Copyright Cengage Learning. Powered by Cognero.

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40. Temporary storage in a computer.

ANSWER: j POINTS: 1

41. Write a program that prompts a user for a filename and tests the file's existence. If the file exists, display the file creation time. If it does not exist, display a message.

ANSWER: The program should be similar to the following: using static System.Console; using System.IO; class FileStatistics { static void Main() { string fileName; Write("Enter a filename >> "); fileName = ReadLine(); if(File.Exists(fileName)) { Writeline ("File exists"); WriteLine("File was created " + File.GetCreationTime(fileName)); WriteLine("File was last accessed " + File.GetLastAccessTime(fileName)); WriteLine("File was last written to " + File.GetLastWrittenTime(fileName)); } else { WriteLine("File does not exist"); } } } POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/18/2019 12:03 PM

42. Describe some of the methods of the Directory class.

ANSWER: The Directory class includes the following methods: * CreateDirectory() creates a directory. * Delete() deletes a directory. * Exists() returns true if the specified directory exists.

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* GetCreationTime() returns a DateTime object specifying when a directory was created. * GetDirectories() returns a string array that contains the names of the subdirectories in the specified directory. * GetFiles() returns a string array that contains the names of the files in the specified directory. * GetLastAccessTime() returns a DateTime object specifying when a directory was last accessed. * GetLastWriteTime() returns a DateTime object specifying when a directory was last modified. * Move() moves a directory to the specified location.

POINTS: 1 REFERENCES: Files and the File and Directory Classes QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.14.01 - Describe computer files and the File and Directory classes DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/18/2019 12:04 PM

43. What is a character?

ANSWER:

A character is any one of the letters, numbers, or other special symbols (such as punctuation marks) that comprise data. Characters are made up of bits (the zeros and ones that represent computer circuitry), but people who use data do not care whether the internal representation for an 'A' is 01000001 or 10111110; rather, they are concerned with the meaning of 'A'-for example, it might represent a grade in a course, a person's initial, or a company code.

POINTS: 1 REFERENCES: Understanding File Data Organization QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.14.02 - Describe file data organization DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/18/2019 12:04 PM

44. What is a record?

ANSWER:

Fields are grouped together to form records. A record is a collection of fields that contain data about an entity. For example, a person's first and last names, Social Security number, zip code, and salary represent that person's record. When programming in C#, you create many classes, such as an Employee class or a Student class. You can think of the data typically stored in each of these classes as a record. These classes contain individual variables that represent data fields. A business's data records usually represent a person, an item, a sales transaction, or some other concrete object or event.

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POINTS: 1 REFERENCES: Understanding File Data Organization QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.14.02 - Describe file data organization DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/18/2019 12:04 PM

45. When you produce screen output and accept keyboard input, you use the Console class, which provides access to which three standard streams?

ANSWER: * Console.In refers to the standard input stream object, which accepts data from the keyboard. * Console.Out refers to the standard output stream object, which allows a program to produce output on the screen. * Console.Error refers to the standard error stream object, which allows a program to write error messages to the screen.

POINTS: 1 REFERENCES: Understanding Streams QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.14.03 - Describe streams DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/18/2019 12:05 PM

46. The FileStream class has 15 overloaded constructors. What can you tell about the FileStream object named myFile, given the constructor below?

FileStream myFile = new FileStream("SomeText.txt", FileMode.Create, FileAccess.Write); ANSWER: In this example, the filename is "SomeText.txt". Because no path is indicated, the file is assumed to be in the current directory. The mode is Create, which means a new file will be created even if one with the same name already exists. The access is Write, which means you can write data to the file but you cannot read from it.

POINTS: 1 REFERENCES: Understanding Streams QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.14.03 - Describe streams DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/18/2019 12:06 PM Copyright Cengage Learning. Powered by Cognero.

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47. A program that reads from a sequential access data file creates a FileStream object, and then the FileStream object is passed to a StreamReader object's constructor. Once this has been done, the ReadLine() method can be used to retrieve one line at a time from the data file. Show the sequence of instructions that would create the FileStream and StreamReader needed to access a data file, and then read one line from the file.

ANSWER: A program that reads from a sequential access data file contains many similar components to one that writes to a file. For example, a FileStream object is created, as in a program that writes to a file. However, the access must be FileAccess.Read (or ReadWrite), as in the following statement: FileStream inFile = new FileStream(FILENAME, FileMode.Open, FileAccess.Read); Then, as when data is being written, the FileStream object is passed to a StreamReader object's constructor, as in the following statement: StreamReader reader = new StreamReader(inFile); After the StreamReader has been defined, the ReadLine() method can be used to retrieve one line at a time from the data file. For example, the following statement gets one line of data from the file and stores it in a string named recordIn: string recordIn = reader.ReadLine(); POINTS: 1 REFERENCES: Writing and reading a Sequential Access File QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.14.04 - Write to and read from a sequential access text file DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/18/2019 12:06 PM

48. Sometimes it is necessary to process a sequential text file multiple times from the beginning during a program's execution. After the file is processed the first time, the file pointer is at the end of the file. How can you reread the file at this point?

ANSWER: After the file is processed the first time, the file pointer is at the end of the file and no more records can be read. To reread the file, you could close it and reopen it, but that requires unnecessary overhead. Instead, you can just reposition the file pointer using the Seek() method and the SeekOrigin enumeration.

POINTS: 1 REFERENCES: Searching a Sequential Text File QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.14.05 - Search a sequential access text file DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/18/2019 12:07 PM

49. What are the disadvantages to writing data to a text file using tokens and delimiters as opposed to writing an entire object to a file at once?

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Writing to a text file allows you to store data for later use. However, there are two disadvantages to writing to a text file: * Data in a text file is easily readable in a text editor such as Notepad. Although this feature is useful to developers when they test programs, it is not a very secure way to store data. * When a record in a data file contains many fields, it is cumbersome to convert each field to text and combine the fields with delimiters before storing the record on a disk. Similarly, when you read a text file, it is somewhat unwieldy to eliminate the delimiters, split the text into tokens, and convert each token to the proper data type.

Writing an entire object to a file at once would be more convenient.

POINTS: 1 REFERENCES: Understanding Serialization and Deserialization QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.14.06 - Appreciate serialization and deserialization DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/15/2019 4:05 PM

50. How can you create a class whose objects can be written to and read from data files? Show an example.

ANSWER: To create a class that can be serialized, you mark it with the [Serializable] attribute.

In a class marked with the [Serializable] attribute, every instance variable must also be serializable. By default, all C# simple data types are serializable, including strings. However, if your class contains fields that are more complex data types, you must check the declaration of those classes to ensure they are serializable.

By default, array objects are serializable. However, if the array contains references to other objects, such as Dates or Students, those objects must be serializable.

The example should be similar to the following: [Serializable] class Employee { public string Name; public double Salary; } POINTS: 1 REFERENCES: Understanding Serialization and Deserialization QUESTION TYPE: Subjective Short Answer HAS VARIABLES: False STUDENT ENTRY MODE: Basic LEARNING OBJECTIVES: MVC#.FARR.18.14.06 - Appreciate serialization and deserialization DATE CREATED: 5/16/2017 1:00 PM DATE MODIFIED: 11/18/2019 12:07 PM

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