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Exam 11: Inheritance and Composition

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Question 21

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Classes can create new classes from existing classes.This important feature ____.

A) encourages code reuse
B) aids the separation of data and operations
C) provides public access to the internal state of an object
D) results in more software complexity

E) C) and D)
F) B) and C)

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Question 22

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Which of the following is true about inheritance?

A) All public member functions of the base class become the public member functions of the derived class.
B) All public member variables of the base class become the public member variables of the derived class.
C) All public members of the base class become the public members of the derived class.
D) The public member variables of the base class become the public or private member variables of the derived class.

E) C) and D)
F) B) and D)

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Question 23

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In object-oriented design,we debug ____________________; in structured programming,we debug functions.

Inheritance is an example of a(n) ____ relationship.

A derived class cannot directly access public members of a base class.

Which of the following statements about inheritance is true if memberAccessSpecifier is protected?

Consider the following class definitions: class bClass { Public: Void setX(int a) ; //Postcondition: x = a; Void print() const; Private: Int x; }; Class dClass: public bClass { Public: Void setXY(int a,int b) ; //Postcondition: x = a; y = b; Void print() const; Private: Int y; }; Which of the following correctly sets the values of x and y?

The term ____________________ is used to describe the ability to create new objects from existing objects.

In multiple inheritance,the derived class has more than one base class.

If inheritance is private,all members of the base class,including private members,become private members of the derived class.

Which of the following class definitions makes the public members of the class aClass become the public members of the class bClass?

The new classes that we create from existing classes are called ____ classes.

____ is the ability to use the same expression to denote different operations.

OOP implements ____.

____ is a "has-a" relationship.

A derived class can directly access the protected members of the base class.

C++ provides ____________________ functions as a means to implement polymorphism in an inheritance hierarchy.

In ____________________ (aggregation),one or more members of a class are objects of another class type.

In the case of composition,the ____________________ name is used to invoke the constructor.

Suppose that bClass is a class.Which of the following statements correctly derives the class dClass from bClass?