Object-Oriented Programming Test Questions
Course Introduction
Object-Oriented Programming is a foundational course that introduces students to the principles and concepts of designing software using the object-oriented paradigm.
Emphasizing encapsulation, inheritance, polymorphism, and abstraction, the course explores how complex problems can be modeled as interacting objects. Students learn to construct modular, reusable, and maintainable code through practical exercises and projects using languages such as Java or C++. The course also covers best practices, design patterns, and debugging techniques, preparing students for advanced software development and real-world application programming.
Recommended Textbook
Starting out with C++ Early Objects 9th Edition by Tony Gaddis
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Chapter 1: Introduction to Computers and Programming
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Sample Questions
Q1) Three primary activities of a typical program are
A) creating variables, operators, and keywords.
B) executing lines, statements, and keywords.
C) reading, writing, and arithmetic.
D) input, processing, and output.
E) compiling, linking, and debugging.
Answer: D
Q2) Syntax involves rules that must be followed when writing a program.
A)True
B)False
Answer: True
Q3) ________ is used in a C++ program to mark the end of a statement, or to separate items in a list.
A) A separator
B) Punctuation
C) An operator
D) A keyword
E) A blank space
Answer: B
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Page 3
Chapter 2: Introduction to C Plus Plus
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Sample Questions
Q1) A variable of the char data type can hold a set of characters like "January".
A)True
B)False Answer: False
Q2) Which of the following keywords is/are the names of C++ data types?
A) short
B) long
C) double
D) bool
E) All of the above Answer: E
Q3) The following is a legal C++ statement to define and initialize a variable.
char firstName = "Jack";
A)True
B)False Answer: False
Q4) C++ is a case-sensitive language.
A)True
B)False Answer: True
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Chapter 3: Expressions and Interactivity
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Sample Questions
Q1) When converting some algebraic expressions to C++, you may need to insert ________ and ________ that do not appear in the algebraic expression.
A) values, exponents
B) operators, calculations
C) operators, operands
D) operators, parentheses
E) operands, parentheses
Answer: D
Q2) Hand tracing a program is
A) a program design technique.
B) a program run-time testing technique.
C) a program debugging technique.
D) creating a drawing of what a program's output screen will look like.
E) none of the above.
Answer: C
Q3) The following C++ statement will assign 1.5 to the result variable. int result = 3.0 / 2.0;
A)True
B)False
Answer: False
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Chapter 4: Making Decisions
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Sample Questions
Q1) Relational operators allow you to ________ numbers.
A) add
B) multiply
C) compare
D) average
E) verify
Q2) What will the following expression evaluate to?
!( 6 > 7 || 3 == 4)
A) 0
B) -1
C) 6
D) True
E) false
Q3) The ________ operator is known as the logical OR operator.
A) !
B) &
C) &&
D) ||
E) //
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Page 6
Chapter 5: Looping
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Sample Questions
Q1) For data validation, it is best to use a(n)
A) if statement.
B) while loop.
C) for loop.
D) nested loop.
E) switch statement.
Q2) The statements in the body of a do-while loop are executed
A) exactly once.
B) at least once.
C) only if the test condition is initially True.
D) until the test condition becomes True.
E) forever until the user hits the break key.
Q3) In order for a C++ program to read data from a file,
A) the file must already exist.
B) the program must define a file stream object that can "point to" (i.e., reference) the file.
C) the program must open the file.
D) All of the above are required.
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Chapter 6: Functions
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Sample Questions
Q1) Functions are ideal for use in menu-drive programs. When a user selects a menu item, the program can call an appropriate function to carry out the user's choice.
A)True
B)False
Q2) When a function just needs to use a copy of an argument passed to it, the argument should normally be passed by value.
A)True
B)False
Q3) A function ________ is a statement that causes a function to execute.
A) prototype
B) header
C) definition
D) call
E) parameter list
Q4) If a function has no return statement, the flow of control moves to the next function in the file when the closing brace of the function body is reached.
A)True
B)False
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Chapter 7: Introduction to Classes and Objects
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Sample Questions
Q1) Which of the following statements correctly creates an enumerated data type and defines an object of that type.
A) enum Season = {"Spring", "Summer", "Fall", "Winter"} favoriteSeason;
B) enum Season = {Spring, Summer, Fall, Winter}, Season favoriteSeason;
C) enum Season {Spring, Summer, Fall, Winter}, enum favoriteSeason;
D) ENUM Season {Spring, Summer, Fall, Winter} favoriteSeason;
E) None of these
Q2) In C++ and other object-oriented programming languages, ADTs are normally implemented as classes.
A)True
B)False
Q3) A class declaration provides a pattern for creating objects, but doesn't make any objects.
A)True
B)False
Q4) A private member function may only be called from a function that is a member of the same class.
A)True
B)False
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Chapter 8: Arrays
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Sample Questions
Q1) Subscript numbering in C++
A) can be set at run time.
B) can begin with a programmer-defined value.
C) varies from program to program.
D) automatically begins with zero.
E) automatically begins with one.
Q2) Which of the following statements will correctly carry out the operation stated in the comment to its right.
A) array 2 = array1 // Copy the elements of array 1 into array 2.
B) cout << array2 // Output the elements stored in array 2.
C) array2 = 5; // Place a 5 in each element of array2.
D) None of the above.
E) A and B, but not C.
Q3) Arrays can be passed to functions, but individual array elements cannot be.
A)True
B)False
Q4) An individual array element can be processed or passed to a function just like a regular C++ variable.
A)True
B)False
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Chapter 9: Searching, Sorting, Algorithm Analysis
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Sample Questions
Q1) If algorithm A requires 2n + 1 basic operations to process an input of size n, and Algorithm B requires 3n + 2 basic operations to process the same input, algorithms A and B are considered to be equally efficient.
A)True
B)False
Q2) Using a binary search, you are more likely to find an item than if you use a linear search.
A)True B)False
Q3) A sorting algorithm can be used to arrange a set of ________ in ________ order. A) numeric values, ascending B) numeric values, descending C) strings, ascending D) strings, descending E) All of the above.
Q4) Using a linear search, you are more likely to find an item than if you use a binary search.
A)True B)False
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Chapter 10: Pointers
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Sample Questions
Q1) If dynamically allocated memory is not freed,
A) the system may run out of memory.
B) it results in a compiler error.
C) a run-time error informs your user that the program did not free memory space.
D) the source code will not link correctly.
E) None of the above
Q2) The term pointer can be used interchangeably with A) address.
B) variable.
C) decimal pointer.
D) counter pointer.
E) None of the above
Q3) The statement double *num;
A) defines a variable of type double called num.
B) defines and initializes a pointer variable called num.
C) initializes a variable called *num.
D) defines a pointer variable called num.
E) None of the above
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Chapter 11: More About Classes and Object-Oriented Programming
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Sample Questions
Q1) The this pointer is a special built-in pointer that is automatically passed as a hidden argument to all instance member functions.
A)True
B)False
Q2) ________ is commonly used to extend a class, or to give it additional capabilities.
A) Inheritance
B) Privacy
C) The constructor
D) The destructor
E) None of the above
Q3) It is a good idea to make a copy constructor's parameters ________ by specifying the ________ keyword in the parameter list.
A) inline, inline
B) static, static
C) constant, const
D) global, glob
E) None of the above
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Page 13
Chapter 12: More on C-Strings and the String Class
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Sample Questions
Q1) The expression str1 < str 2 is True when
A) the string object str1 precedes the string str 2 in alphabetic order.
B) the string str1 converted to numeric form is less than the string str2 converted to numeric form.
C) the length of the string str1 is less than the length of the string str2.
D) the C-string "str1" precedes the C-string "str2" in alphabetic order.
E) None of the above
Q2) There exist C++ stream classes that write and read in-memory strings.
A)True
B)False
Q3) To access the last character of a string class object str you can use the expression A) str[last].
B) str.last().
C) str[str.length()].
D) str[str.length()-1].
E) None of the above
Q4) A C-string can be assigned to a variable whose type is the string class.
A)True
B)False
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Chapter 13: Advanced File and Io Operations
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Sample Questions
Q1) The process of writing in-memory objects to a file so that the object can later be read back into memory
A) requires the use of specialized convert constructors.
B) is called serialization.
C) requires special operation system support.
D) is called deserialization.
E) None of the above
Q2) Which statement opens a file and links it to a file stream object?
A) open(AFile) = link(anObject);
B) file.open("filename.txt");
C) linkstream("filename.txt");
D) link(open(filename.txt"));
E) None of the above
Q3) Opening a file with the flags ios::in | ios::out will preserve the contents of the file if the file already exists.
A)True
B)False
Q4) The ios::hardfail bit is set when an unrecoverable error occurs.
A)True
B)False
Page 15
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Chapter 14: Recursion
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Sample Questions
Q1) Indirect recursion means that a function calls itself several times.
A)True
B)False
Q2) A ________ function is one that calls itself.
A) dynamic
B) static
C) recursive
D) data validation
E) None of the above
Q3) The quicksort algorithm works on the basis of
A) three sublists.
B) two sublists and a pivot.
C) two pivots and a sublist.
D) three pivots.
E) None of the above
Q4) A recursive function cannot call a function other than itself.
A)True
B)False
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Page 16
Chapter 15: Polymorphism and Virtual Functions
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Sample Questions
Q1) In C++ polymorphism is very difficult to achieve unless you also use inheritance.
A)True
B)False
Q2) When more than one class is derived from a base class, the situation is called
A) polymorphism.
B) population.
C) multiplicity.
D) encapsulation.
E) None of the above
Q3) An abstract class is somewhat restricted in how it can be used because
A) it cannot use dynamic binding for its member functions.
B) it cannot use static binding for its member functions.
C) All of its members must be public.
D) the compiler does not allow objects of the class to be created.
E) None of the above
Q4) Pointers to a base class may be assigned the address of a derived class object.
A)True
B)False
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Chapter 16: Exceptions, Templates, and the Standard
Template Library Stl
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Sample Questions
Q1) The STL vector and list classes are examples of sequential containers.
A)True
B)False
Q2) Iterators are objects that are similar to pointers.
A)True
B)False
Q3) The Standard Template Library (STL) contains templates for useful algorithms and data structures.
A)True
B)False
Q4) A catch block serves as
A) an exception handler.
B) an indicator of program correctness.
C) a temporary variable.
D) permanent storage for trapped errors.
E) None of the above
Q5) Function templates allow you to write a single function definition that works with many different data types.
A)True
B)False
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Chapter 17: Linked Lists
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Sample Questions
Q1) If a node is not the first node in a linked list, deleting it may require setting the successor pointer in its predecessor.
A)True
B)False
Q2) To concatenate two linked lists, it is necessary to
A) traverse one of the lists to get to its end.
B) traverse both lists to get to their ends.
C) first reverse one of the lists.
D) first reverse both lists.
E) None of the above
Q3) The values stored in the value portion of a node of a linked list can be simple data types, structures, objects of classes, or any other data type.
A)True
B)False
Q4) When you create a linked list, you must know in advance how many nodes the list will contain.
A)True
B)False
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Chapter 18: Stacks and Queues
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Sample Questions
Q1) The pop function in the stack template of the STL does not return the value from the top of the stack.
A)True
B)False
Q2) The Standard Template Library offers a stack template that may be implemented as a
A) vector.
B) deque.
C) linked list.
D) All of the above
E) None of the above
Q3) The ________ operation allows an item to be stored on a stack.
A) append
B) add
C) pop
D) push
E) None of the above
Q4) The programmer must declare in advance the size of a dynamic stack or queue. A)True
B)False
Page 20
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Chapter 19: Binary Trees
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Sample Questions
Q1) Values are commonly stored in a binary search tree so that a node's ________ child holds data that is less than the ________ data, while the node's data is less than the data in the other child.
A) right, node's
B) left, node's
C) right, left child's
D) left, right child's
E) None of the above
Q2) Binary search trees may be implemented as templates, but any data types used with them should support the ________ operator.
A) <
B) >
C) ==
D) All of the above
E) None of the above
Q3) In a binary search tree where all the stored values are different, the node holding the largest value cannot have two children.
A)True
B)False
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