Deck 15: Inheritance, Polymorphism, and Virtual Functions

Question 1

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 these

Answer 1

E

Question 2

The base class access specification determines how ___________ members in the base class may be accessed by derived classes.

A) private
B) public
C) protected
D) a, b, and c
E) None of these

Answer 2

D

Question 3

When the compiler binds a member function call with the version of the function that resides in the same class as the call itself, this is considered __________ binding.

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

Answer 3

C

Question 4

The term __________ means the ability to take many forms.

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

Question 5

The ________ constructor is called before the _______ constructor.

A) base, derived
B) derived, base
C) public, private
D) private, public
E) None of these

Question 6

_________ members of a base class are never accessible to a derived class.

A) Public
B) Private
C) Protected
D) a, b, and c
E) None of these

Question 7

The following statement class Car : private Vehicle
Allows the __________ members of the Car class to access ___________ members of the Vehicle class.

A) private, private
B) public, private
C) protected, private
D) public, protected
E) None of these

Question 8

Protected members of a base class are like _________, but they may be accessed by derived classes.

A) constructor functions
B) static members
C) private members
D) public members
E) None of these

Question 9

Multiple inheritance opens the opportunity for a derived class to have ___________ members.

A) dynamic
B) private
C) public
D) ambiguous
E) None of these

Question 10

When you derive a class from an existing class, you _________ add new data and functions.

A) may never
B) may sometimes
C) may
D) None of these

Question 11

_________ allows us to create new classes based on existing classes.

A) Polymorphism
B) Inheritance
C) Function overloading
D) The copy constructor
E) None of these

Question 12

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

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

Question 13

In the statement class car : public vehicle, which is the base class?

A) car
B) vehicle
C) public
D) class
E) None of these

Question 14

The base class's __________ affects the way its members are inherited by the derived class.

A) name
B) return data type
C) access specification
D) a and b
E) None of these

Question 15

In an inheritance situation, the new class that you create from an existing class is known as the ____________.

A) derived class
B) inheritee
C) child class
D) a and c
E) None of these

Question 16

Arguments are passed to the base class destructor function by the ________ class __________ function.

A) derived, constructor
B) derived, destructor
C) base, constructor
D) base, destructor
E) None of these

Question 17

The ________ destructor is called before the _______ destructor.

A) base, derived
B) derived, base
C) public, private
D) private, public
E) None of these

Question 18

The compiler performs __________ on virtual functions.

A) static binding
B) dynamic binding
C) additional error checking
D) no special services
E) None of these

Question 19

A __________ of a base class expects to be overridden in a derived class.

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

Question 20

When a derived class has two or more base classes, the situation is known as __________.

A) multiple inheritance
B) polymorphism
C) encapsulation
D) access specification
E) None of these

Question 21

The base class access specification can be viewed as a filter that base class members must pass through when becoming inherited members of a derived class.

Question 22

A virtual function is a member function that expects to be _________ in a derived class.

A) ignored
B) called frequently
C) overridden
D) private
E) None of these

Question 23

More than one class may be derived from a base class.

Question 24

When arguments must be passed to the base class constructor, they are passed from the derived class constructor's header line.

Question 25

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

Question 26

In an inheritance situation, you may not pass arguments to a base class constructor.

Question 27

__________ functions are dynamically bound by the compiler.

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

Question 28

Static binding occurs when the compiler binds a function call with the function call that resides in the same class as the call itself.

Question 29

In the following statement class car : protected vehicle
What is being protected?

A) derived class functions
B) base class members
C) derived class data
D) future inherited classes
E) None of these

Question 30

In the following statement class Car : protected Vehicle
Which is the derived class?

A) Car
B) Vehicle
C) protected
D) cannot be determined
E) None of these

Question 31

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

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

Question 32

A member function of a derived class may not have the same name as a member function of a base class.

Question 33

A derived class may not have any classes derived from it.

Question 34

Multiple inheritance is when a _________ class has ___________ base classes.

A) base, no
B) derived, two or more
C) derived, no
D) compound, more than two
E) None of these

Question 35

____________ 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 these

Question 36

When member functions behave differently, depending upon which object performed the call, this is an example of ___________.

A) chaos theory
B) virtual insubordination
C) polymorphism
D) encapsulation
E) None of these

Question 37

A derived class may become a base class, if another class is derived from it.

Question 38

Polymorphism is when ____________ in a class hierarchy perform differently, depending upon which object performs the call.

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