Event-Driven Programming
Midterm Exam
Course Introduction
Event-Driven Programming is a software development paradigm that centers on the flow of the program being determined by external events such as user actions, sensor outputs, or messages from other programs. This course introduces students to the principles and techniques of event-driven design, including callbacks, event listeners, handlers, and the use of frameworks and libraries for building interactive applications. Students will learn to architect responsive systems, manage asynchronous operations, and design scalable solutions typically found in graphical user interfaces, web applications, and real-time systems. Through hands-on projects and exercises, participants will develop practical skills in creating interactive programs that react dynamically to a variety of inputs and events.
Recommended Textbook
Programming with Microsoft Visual Basic 2012 6th Edition by Diane Zak
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14 Chapters
802 Verified Questions
802 Flashcards
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Page 2
Chapter 1: An Introduction to Visual Basic 2012
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Sample Questions
Q1) You enter the procedure's code in the ____ window.
A) Code Editor
B) Server
C) Solution
D) Designer Answer: A
Q2) A class definition is a block of code that specifies or defines an object's appearance and behavior.
A)True
B)False
Answer: True
Q3) A user ____ is what the user sees and interacts with while an application is running.
A) service
B) profile
C) splash
D) interface
Answer: D
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Page 3
Chapter 2: Designing Applications
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Sample Questions
Q1) The syntax of the Focus method is ____,where "object" is the name of the object to which you want the focus sent.
A) object.GetFocus()
B) object.SetFocus()
C) object.Focus()
D) object.FocusThis()
Answer: C
Q2) How many text boxes do you need for the application?
A) three
B) four
C) five
D) six
Answer: B
Q3) The number of different colors used on a form should be limited to ____ colors exclusive of black,white,and gray.
A) two
B) three
C) four
D) five
Answer: B
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Chapter 3: Using Variables and Constants
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Sample Questions
Q1) You cannot associate a procedure with more than one object or event.
A)True
B)False
Answer: False
Q2) A procedure in an application needs to store data used to calculate the total price of purchasing tires.The price of the tires will contain a decimal place.The number of tires will always be a whole number.Write the appropriate Dim statements to declare the variables.Make sure to use appropriate naming conventions.
Answer: Dim decPrice As Decimal
Dim intTires As Integer
Q3) A control's ____ event occurs when a change is made to the contents of a control's Text property.
A) CodeChanged
B) TextChanged
C) ChangedText
D) TextModified
Answer: B
Q4) What is a static variable? How is it different from a class-level variable?
Answer: 11ea7cc1_5d3e_2f40_928c_3bfbf4b3c39d_TB6958_00
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Chapter 4: The Selection Structure
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Sample Questions
Q1) If dblMiles >= 500 Then dblMiles = dblMiles * 0.45
Else
DblMiles = dblMiles * 0.25
End If
The dblMiles variable contains the number 575 before the code above is processed.What value will be in the variable after the code is processed?
A) 0
B) 143.75
C) 225
D) 258.75
Q2) What is a selection structure? What is the difference between a single-alternative and dual-alternative selection structure?
Q3) Before using a string in a comparison,you can use either the ToUpper method or the ToLower method to convert the string to uppercase or lowercase,respectively,and then use the converted string in the comparison.
A)True
B)False
Q4) What is a group box and how is it used?
Q5) Write an If clause to determine whether the user pressed the Backspace key.
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Chapter 5: More on the Selection Structure
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Sample Questions
Q1) If the intQuantity variable contains the number 10 and the customer is a member,what value will be in the decTotal variable after the code is processed?
A) 0
B) 125
C) 140
D) 150
Q2) The minimum number of radio buttons in a group is one.
A)True
B)False
Q3) If the intQuantity variable contains the number 25 and the customer is not a member,what value will be in the decTotal variable after the code is processed?
A) 0
B) 312.50
C) 350
D) 375
Q4) What is a nested selection structure? How do primary and secondary decisions relate to a nested selection structure?
Q5) Define the term "algorithm." How is desk-checking used to verify algorithms?
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Chapter 6: The Repetition Structure
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Sample Questions
Q1) You can use either the SelectedItem or ____ property to determine whether an item is selected in a list box.
A) Selection
B) SelectedIndex
C) ItemChoice
D) Items
Q2) Explain the difference between a looping condition and a loop exit condition.
Q3) Adding increments of a negative number is referred to as ____.
A) decrementing
B) initializing
C) deprocessing
D) negating
Q4) Write the assignment statements needed to increment the intCount counter by 1 and update the decBalance variable by the value stored in the decOrderAmount variable.
Q5) What is a counter-controlled loop and when is it used in a program? What statement provides the most efficient way to write a counter-controlled loop?
Q6) What is the Refresh method? Write the syntax for this method.
Q7) What is a list box? Provide two of the Windows standards for its use on a form.
Page 8
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Chapter 7: Sub and Function Procedures
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Sample Questions
Q1) For the access key to work correctly in a combo box,you must set the label's TabIndex property to a value that is ____ the combo box's TabIndex value.
A) identical to B) one less than C) one more than D) greater than or equal to
Q2) When will the TextChanged event occur for a combo box? Which style allows the user to edit the text of the combo box?
Q3) An event procedure is a Function procedure that is associated with a specific object and event.
A)True
B)False
Q4) In most cases,the last statement within a function is the ____ expression.
A) End Function
B) Return
C) As
D) Private
Q5) What is the difference between a Sub procedure and a Function procedure?
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Chapter 8: String Manipulation
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Sample Questions
Q1) The strSerialNum variable contains the string "DRY259614".Write the Visual Basic statement that assigns the string "259614" from the strSerialNum variable to the strProductCode variable.
Q2) What is the difference between a menu item's access key and shortcut key?
Q3) Write the condition that evaluates to True when a dash (-)appears anywhere within the strItemNum variable.
Q4) The HR department has decided to change the Finance department number from 04 to 09.Which of the following statements correctly changes the contents of the strEmpCode?
A) strEmpCode = strEmpCode.Replace("04","09")
B) strEmpCode = strEmpCode.Replace("09","04")
C) strEmpCode = strEmpCode.Remove(0,2)
StrEmpCode = strEmpCode.Insert(1,"09")
D) strEmpCode = strEmpCode.Remove(1,2)
StrEmpCode = strEmpCode.Insert(1,"04")
Q5) A literal type character forces a literal constant to assume a data type other than the one its form indicates.
A)True
B)False
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Chapter 9: Arrays
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Sample Questions
Q1) The following statement will declare an array.What is the index value for the first element? Dim lakes(5)
A) 0
B) 1
C) 4
D) 5
Q2) Write the statement to declare a seven-element procedure-level array named strItemCode with each element initialized to the keyword Nothing.
Q3) Which of the following statements declares a class-level one-dimensional array named strToppings that stores the 14 available pizza toppings?
A) Dim strToppings(13)As String
B) Private strToppings(13)As String
C) Dim strToppings(14)As String
D) Private strToppings(14)As String
Q4) Write the statement to declare a twelve-row,two-column procedure-level array named strLocations,initializing each element to the keyword Nothing.
Q5) How do the elements in parallel one-dimensional arrays relate to each other? Provide an example.
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Chapter 10: Structures and Sequential Access Files
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Sample Questions
Q1) Write a Structure statement that defines a structure named Vehicle.The structure contains three member variables named strMake,strModel,and intYear.Then write the Private statement that declares a Vehicle variable named truck.
Q2) Data types created using the Structure statement are referred to as user-defined data types or structures.
A)True
B)False
Q3) The ____ method writes a newline character after the data.
A) WriteLine
B) ReadLine
C) Write method
D) Read
Q4) Files that are read by the computer are called ____ files.
A) storage
B) serial
C) input
D) report
Q5) Write the statement that would remove the selected item from the lstFlowers control if an item is selected.
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Chapter 11: Classes and Objects
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Sample Questions
Q1) When a variable in a class is declared using the Public keyword,it can be used only within the class.
A)True
B)False
Q2) A one-dimensional array's Length property is an example of a ReadOnly property.
A)True
B)False
Q3) The Lumber class definition contains two Private variables named _dblLength and _decPricePerFoot.The default constructor initializes the Private variables to 0 when the Lumber object is created.Write the statements to create a parameterized constructor,and then write the Dim statement using the parameterized constructor to instantiate and initialize the Lumber object where the number of feet of lumber is 31.5 and the price per foot is 1.85.
Q4) A(n)____ is a class method whose sole purpose is to initialize the class's Private variables.
A) signature
B) constructor
C) Get block
D) event
Q5) What is an auto-implemented property and what does it automatically create?
Page 13
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Chapter 12: Web Applications
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Sample Questions
Q1) The Web consists of documents called ____ that are stored on Web servers.
A) URLs
B) browsers
C) clients
D) Web pages
Q2) The ____ tag in a Web page is similar to the ControlChars.NewLine constant in a Windows form.
A) <div>
B) <h1>
C) <p>
D) <br />
Q3) A drop-down list control has been added to a Web page.Add the following four majors as list items to the control: Information Systems,Accounting,Management,and Marketing.
Q4) The purpose of the ____ tool is to compare an entry with a constant value or the property stored in a control.
A) CompareValidator
B) RegularExpressionValidator
C) RequiredFieldValidator
D) CustomValidator
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Chapter 13: Working With Access Databases and Linq
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Sample Questions
Q1) Write a LINQ statement to select all records.
Q2) The BindingSource object stores the position of the record pointer in its ____ property.
A) View
B) Position
C) Navigation
D) Cell
Q3) The ____ clause of LINQ is used to arrange the records in either ascending (the default)or descending order by one or more fields.
A) Order By
B) condition
C) query
D) Where
Q4) The ____ object provides the connection between the DataSet and the bound controls on the form.
A) TableAdapter
B) DataGridView
C) BindingSource
D) BindingNavigator
Q5) What is the DataGridView control and how is it used?
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Chapter 14: Access Databases and SQL
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Sample Questions
Q1) The ____ clause is used to arrange the records in either ascending (the default)or descending order by one or more fields.
A) GROUP BY
B) WHERE
C) ORDER BY
D) JOIN
Q2) Most of the time,you will know in advance the values to include in the criteria of a query.
A)True
B)False
Q3) The wildcard character is the ____.
A) %
B) &
C) *
D) @
Q4) For the changes made to a dataset to be permanent,you need to save the changes to the database associated with the dataset.
A)True
B)False
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