Question 1

To indicate that a member function of a class is pure virtual,

Accepted Answer

A) you must include the header file. B) you use the keywords pure virtual. C) you must put = 0 where the body of the function would go. D) All of the above E) None of the above A) you must include the header file. B) you use the keywords pure virtual. C) you must put = 0 where the body of the function would go. D) All of the above E) None of the above C

Question 2

In C++, polymorphism is very difficult to achieve unless you also use inheritance.

Accepted Answer

A) True 
 B)False  True

Question 3

When a virtual member function of a class in a class hierarchy is invoked through a pointer to an object in the class hierarchy, the compiler will select the member function to be invoked

Accepted Answer

A) from the class of the object that is pointed to. 
B) from the class of the type of the pointer. 
C) from the base class of the inheritance hierarchy. 
D) from the derived class of the base pointer object. 
E) None of the above 
A) from the class of the object that is pointed to. 
B) from the class of the type of the pointer. 
C) from the base class of the inheritance hierarchy. 
D) from the derived class of the base pointer object. 
E) None of the above A

Question 4

A class with at least one pure virtual function is called

Accepted Answer

A) an abstract class. 
B) a pure virtual class. 
C) a virtual base class. 
D) All of the above 
E) None of the above 
A) an abstract class. 
B) a pure virtual class. 
C) a virtual base class. 
D) All of the above 
E) None of the above

Question 5

functions are dynamically bound by the compiler.

Accepted Answer

A) Constructor 
B) Static 
C) Destructor 
D) Virtual 
E) None of the above 
A) Constructor 
B) Static 
C) Destructor 
D) Virtual 
E) None of the above

Question 6

Declaring a member function of a class to be a _ will cause the C++ compiler to use dynamic binding.

Accepted Answer

A) static function 
B) destructor function 
C) virtual function 
D) constructor function 
E) None of the above 
A) static function 
B) destructor function 
C) virtual function 
D) constructor function 
E) None of the above

Question 7

An abstract class is

Accepted Answer

A) one that supports polymorphism. 
B) one that has all of its member functions declared private. 
C) one that has all of its member variables declared private. 
D) one that has at least one pure virtual function. 
E) None of the above 
A) one that supports polymorphism. 
B) one that has all of its member functions declared private. 
C) one that has all of its member variables declared private. 
D) one that has at least one pure virtual function. 
E) None of the above

Question 8

to a base class may be assigned the address of a derived class object.

Accepted Answer

A) Access specifiers 
B) Static members 
C) Pointers 
D) Private members 
E) None of the above 
A) Access specifiers 
B) Static members 
C) Pointers 
D) Private members 
E) None of the above

Question 9

Polymorphism is when in a class hierarchy perform differently, depending upon the class of the object making the call.

Accepted Answer

A) derived class constructors 
B) derived class destructors 
C) member functions 
D) base class constructors 
E) None of the above 
A) derived class constructors 
B) derived class destructors 
C) member functions 
D) base class constructors 
E) None of the above

Question 10

A pure virtual function

Accepted Answer

A) must be accompanied by a virtual constructor of the same class. 
B) must be overridden in a derived class for the function to be useful. 
C) executes more efficiently than a non- pure virtual function. 
D) All of the above 
E) None of the above 
A) must be accompanied by a virtual constructor of the same class. 
B) must be overridden in a derived class for the function to be useful. 
C) executes more efficiently than a non- pure virtual function. 
D) All of the above 
E) None of the above

Question 11

Static binding occurs when the compiler binds a function call at compile time.

Accepted Answer

A) True 
 B)False

Question 12

A pure virtual function

Accepted Answer

A) is a virtual function that has no implementation. 
B) is a virtual function that performs a single task in program. 
C) is a virtual function that has been completely debugged. 
D) is one that is only called from within a virtual constructor. 
E) None of the above 
A) is a virtual function that has no implementation. 
B) is a virtual function that performs a single task in program. 
C) is a virtual function that has been completely debugged. 
D) is one that is only called from within a virtual constructor. 
E) None of the above

Question 13

A virtual function is declared by placing the keyword in front of the return type in the base class's function declaration.

Accepted Answer

A) protected 
B) virtual 
C) private 
D) public 
E) None of the above 
A) protected 
B) virtual 
C) private 
D) public 
E) None of the above

Question 14

Pointers to a base class may be assigned the address of a derived class object.

Accepted Answer

A) True 
 B)False

Question 15

Polymorphism in C++ will not work unless .

Accepted Answer

A) the header file is included B) the members of the class are public C) pointers or references are being used D) All of the above E) None of the above A) the header file is included B) the members of the class are public C) pointers or references are being used D) All of the above E) None of the above

Question 16

The term means the ability to take many forms.

Accepted Answer

A) polymorphism 
B) inheritance 
C) member function 
D) encapsulation 
E) None of the above 
A) polymorphism 
B) inheritance 
C) member function 
D) encapsulation 
E) None of the above

Question 17

When more than one class is derived from a base class, the situation is called

Accepted Answer

A) encapsulation. 
B) multiplicity. 
C) population. 
D) polymorphism. 
E) None of the above 
A) encapsulation. 
B) multiplicity. 
C) population. 
D) polymorphism. 
E) None of the above

Question 18

An abstract class is somewhat restricted in how it can be used because

Accepted Answer

A) All of its members must be public. 
B) it cannot use dynamic binding for its member functions. 
C) the compiler does not allow objects of the class to be created. 
D) it cannot use static binding for its member functions. 
E) None of the above 
A) All of its members must be public. 
B) it cannot use dynamic binding for its member functions. 
C) the compiler does not allow objects of the class to be created. 
D) it cannot use static binding for its member functions. 
E) None of the above

Question 19

When the compiler binds a call to a member function using only information available at compile time, the compiler is said to use binding.

Accepted Answer

A) static 
B) local 
C) dynamic 
D) safe 
E) None of the above 
A) static 
B) local 
C) dynamic 
D) safe 
E) None of the above

Question 20

In C++, polymorphism is based on the ability to make member functions of a class

Accepted Answer

A) protected. 
B) virtual. 
C) static. 
D) encapsulated. 
E) None of the above 
A) protected. 
B) virtual. 
C) static. 
D) encapsulated. 
E) None of the above

To indicate that a member function of a class is pure virtual,

In C++, polymorphism is very difficult to achieve unless you also use inheritance.

When a virtual member function of a class in a class hierarchy is invoked through a pointer to an object in the class hierarchy, the compiler will select the member function to be invoked

A class with at least one pure virtual function is called

functions are dynamically bound by the compiler.

Declaring a member function of a class to be a _ will cause the C++ compiler to use dynamic binding.

An abstract class is

to a base class may be assigned the address of a derived class object.

Polymorphism is when in a class hierarchy perform differently, depending upon the class of the object making the call.

A pure virtual function

Static binding occurs when the compiler binds a function call at compile time.

A pure virtual function

A virtual function is declared by placing the keyword in front of the return type in the base class's function declaration.

Pointers to a base class may be assigned the address of a derived class object.

Polymorphism in C++ will not work unless .

The term means the ability to take many forms.

When more than one class is derived from a base class, the situation is called

An abstract class is somewhat restricted in how it can be used because

When the compiler binds a call to a member function using only information available at compile time, the compiler is said to use binding.

In C++, polymorphism is based on the ability to make member functions of a class

Introduction to Computers and Programming

Introduction to C++

Expressions and Interactivity

Making Decisions

Looping

Functions

Introduction to Classes and Objects

Arrays

Searching, Sorting, and Algorithm Analysis

Pointers

More About Classes and Object-Oriented Programming

More on C-Strings and the String Class

Advanced File and Io Operations

Recursion

Exceptions, Templates, and the Standard Template Library STL

Linked Lists

Stacks and Queues

Binary Trees

Filters

Exam 15: Polymorphism and Virtual Functions

To indicate that a member function of a class is pure virtual,

In C++, polymorphism is very difficult to achieve unless you also use inheritance.

When a virtual member function of a class in a class hierarchy is invoked through a pointer to an object in the class hierarchy, the compiler will select the member function to be invoked

A class with at least one pure virtual function is called

functions are dynamically bound by the compiler.

Declaring a member function of a class to be a _ will cause the C++ compiler to use dynamic binding.

An abstract class is

to a base class may be assigned the address of a derived class object.

Polymorphism is when in a class hierarchy perform differently, depending upon the class of the object making the call.

A pure virtual function

Static binding occurs when the compiler binds a function call at compile time.

A pure virtual function

A virtual function is declared by placing the keyword in front of the return type in the base class's function declaration.

Pointers to a base class may be assigned the address of a derived class object.

Polymorphism in C++ will not work unless .

The term means the ability to take many forms.

When more than one class is derived from a base class, the situation is called

An abstract class is somewhat restricted in how it can be used because

When the compiler binds a call to a member function using only information available at compile time, the compiler is said to use binding.

In C++, polymorphism is based on the ability to make member functions of a class

Introduction to Computers and Programming

Introduction to C++

Expressions and Interactivity

Making Decisions

Looping

Functions

Introduction to Classes and Objects

Arrays

Searching, Sorting, and Algorithm Analysis

Pointers

More About Classes and Object-Oriented Programming

More on C-Strings and the String Class

Advanced File and Io Operations

Recursion

Exceptions, Templates, and the Standard Template Library STL

Linked Lists

Stacks and Queues

Binary Trees

Filters