Question 1

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

Accepted Answer

A) True 
 B)False  True

Question 2

A virtual member function of class that should not be overridden in a derived class should be declared

Accepted Answer

A)  with the keyword const. 
B)  with the keyword final. 
C)  with symbol ! followed by the keyword override. 
D)  as private in its class. 
E)  as protected in its class. 
A)  with the keyword const. 
B)  with the keyword final. 
C)  with symbol ! followed by the keyword override. 
D)  as private in its class. 
E)  as protected in its class. B

Question 3

The term ________ means the ability to take many forms.

Accepted Answer

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

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

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

Question 6

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

Question 7

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

Question 8

A class with at least one pure virtual function is called

Accepted Answer

A)  a pure virtual class. 
B)  a virtual base class. 
C)  an abstract class. 
D)  All of the above 
E)  None of the above 
A)  a pure virtual class. 
B)  a virtual base class. 
C)  an abstract class. 
D)  All of the above 
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)  base class constructors 
B)  derived class destructors 
C)  member functions 
D)  derived class constructors 
E)  None of the above 
A)  base class constructors 
B)  derived class destructors 
C)  member functions 
D)  derived class constructors 
E)  None of the above

Question 10

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

Accepted Answer

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

Question 11

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

Accepted Answer

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

Question 12

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

Accepted Answer

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

Question 13

A pure virtual function

Accepted Answer

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

Question 14

An abstract class is

Accepted Answer

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

Question 15

Polymorphism in C++ will not work unless ________.

Accepted Answer

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

Question 16

A pure virtual function

Accepted Answer

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

Question 17

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

Accepted Answer

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 
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

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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

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

A virtual member function of class that should not be overridden in a derived class should be declared

The term ________ means the ability to take many forms.

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

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

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

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

A class with at least one pure virtual function is called

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

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

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

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

A pure virtual function

An abstract class is

Polymorphism in C++ will not work unless ________.

A pure virtual function

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

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

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

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

Introduction to Computers and Programming

Introduction to C Plus Plus

Expressions and Interactivity

Making Decisions

Looping

Functions

Introduction to Classes and Objects

Arrays

Searching, Sorting, 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

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

A virtual member function of class that should not be overridden in a derived class should be declared

The term ________ means the ability to take many forms.

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

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

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

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

A class with at least one pure virtual function is called

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

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

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

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

A pure virtual function

An abstract class is

Polymorphism in C++ will not work unless ________.

A pure virtual function

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

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

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

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

Introduction to Computers and Programming

Introduction to C Plus Plus

Expressions and Interactivity

Making Decisions

Looping

Functions

Introduction to Classes and Objects

Arrays

Searching, Sorting, 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