Question 1

Protected base class members cannot be accessed by:

Accepted Answer

A)  Functions that are neither friends of the base class, derived-class member functions nor friends of a derived class. 
B)  friends of the base class. 
C)  Functions that are not derived-class member functions. 
D)  friends of derived classes. 
A)  Functions that are neither friends of the base class, derived-class member functions nor friends of a derived class. 
B)  friends of the base class. 
C)  Functions that are not derived-class member functions. 
D)  friends of derived classes. A

Question 2

Which of the following is not a kind of inheritance in C++?

Accepted Answer

A)  public. 
B)  private. 
C)  static. 
D)  protected. 
A)  public. 
B)  private. 
C)  static. 
D)  protected. C

Question 3

Public CommissionEmployee
Which of the following is false?

Accepted Answer

A)  The colon : ) in the header of the class definition indicates inheritance. 
B)  The keyword public indicates the type of inheritance. 
C)  All the public and protected members of class BasePlusCommissionEmployee are inherited as public and protected members, respectively, into class CommissionEmployee. 
D)  CommissionEmployee is the base class and BasePlusCommissionEmployee is the derived class. 
A)  The colon : ) in the header of the class definition indicates inheritance. 
B)  The keyword public indicates the type of inheritance. 
C)  All the public and protected members of class BasePlusCommissionEmployee are inherited as public and protected members, respectively, into class CommissionEmployee. 
D)  CommissionEmployee is the base class and BasePlusCommissionEmployee is the derived class. C

Question 4

Base class constructors and assignment operators:

Accepted Answer

A)  Are not inherited by derived classes. 
B)  Should not be called by derived class constructors and assignment operators. 
C)  Can be inherited by derived classes, but generally are not. 
D)  Can call derived-class constructors and assignment operators. 
A)  Are not inherited by derived classes. 
B)  Should not be called by derived class constructors and assignment operators. 
C)  Can be inherited by derived classes, but generally are not. 
D)  Can call derived-class constructors and assignment operators.

Question 5

When should base class members be declared protected?

Accepted Answer

A)  When all clients should be able to access these members. 
B)  When these members are used only by member functions of this base class. 
C)  When these members should be available only to derived classes and friends), but not to other clients. 
D)  The protected access specified should never be used. 
A)  When all clients should be able to access these members. 
B)  When these members are used only by member functions of this base class. 
C)  When these members should be available only to derived classes and friends), but not to other clients. 
D)  The protected access specified should never be used.

Question 6

From most restrictive to least restrictive, the access modifiers are:

Accepted Answer

A)  protected, private, public 
B)  private, protected, public 
C)  private, public, protected 
D)  protected, public, private 
A)  protected, private, public 
B)  private, protected, public 
C)  private, public, protected 
D)  protected, public, private

Question 7

CommissionEmployee first, last, ssn, sales, rate )
The second line:

Accepted Answer

A)  Invokes the CommissionEmployee constructor with arguments. 
B)  Causes a compiler error. 
C)  Is unnecessary because the CommissionEmployee constructor is called automatically. 
D)  Indicates inheritance. 
A)  Invokes the CommissionEmployee constructor with arguments. 
B)  Causes a compiler error. 
C)  Is unnecessary because the CommissionEmployee constructor is called automatically. 
D)  Indicates inheritance.

Question 8

Suppose class A inherits from base class B. What is the order in which their constructors and destructors will be called when an object of class A is instantiated and then destroyed?

Accepted Answer

A)  B constructor, A constructor, A destructor, B destructor. 
B)  B constructor, A constructor, B destructor, A destructor. 
C)  A constructor, B constructor, A destructor, B destructor. 
D)  A constructor, B constructor, B destructor, A destructor. 
A)  B constructor, A constructor, A destructor, B destructor. 
B)  B constructor, A constructor, B destructor, A destructor. 
C)  A constructor, B constructor, A destructor, B destructor. 
D)  A constructor, B constructor, B destructor, A destructor.

Question 9

The is-a relationship represents.

Accepted Answer

A)  Composition. 
B)  Inheritance. 
C)  Information Hiding. 
D)  A friend. 
A)  Composition. 
B)  Inheritance. 
C)  Information Hiding. 
D)  A friend.

Question 10

Which of the following is most likely a base class of the other three?

Accepted Answer

A)  automobile. 
B)  convertible. 
C)  miniVan. 
D)  sedan. 
A)  automobile. 
B)  convertible. 
C)  miniVan. 
D)  sedan.

Question 11

To declare class subClass a privately derived class of superClass one would write:

Accepted Answer

A)  class subclass : private superClass 
B)  class subclass :: private superClass 
C)  class subclass  
D)  class subclass inherits private superClass 
A)  class subclass : private superClass 
B)  class subclass :: private superClass 
C)  class subclass  
D)  class subclass inherits private superClass

Question 12

Select the false statement regarding inheritance.

Accepted Answer

A)  A derived class can contain more attributes and behaviors than its base class. 
B)  A derived class can be the base class for other derived classes. 
C)  Some derived classes can have multiple base classes. 
D)  Base classes are usually more specific than derived classes. 
A)  A derived class can contain more attributes and behaviors than its base class. 
B)  A derived class can be the base class for other derived classes. 
C)  Some derived classes can have multiple base classes. 
D)  Base classes are usually more specific than derived classes.

Question 13

Which of the following is not one of the disadvantages of using the "copy-and-paste" approach to duplicating code from one class into another class?

Accepted Answer

A)  Errors are prone to be spread around. 
B)  It is time consuming. 
C)  It forces the system to store many physical copies of the code, creating a code-maintenance nightmare. 
D)  All of the above are disadvantages of the "copy-and-paste" approach. 
A)  Errors are prone to be spread around. 
B)  It is time consuming. 
C)  It forces the system to store many physical copies of the code, creating a code-maintenance nightmare. 
D)  All of the above are disadvantages of the "copy-and-paste" approach.

Question 14

When an object of a derived class is instantiated, the __________ constructor initializes the _________ members.

Accepted Answer

A)  Base class, base class. 
B)  Derived class, base class. 
C)  Base class, derived class. 
D)  Derived class, public. 
A)  Base class, base class. 
B)  Derived class, base class. 
C)  Base class, derived class. 
D)  Derived class, public.

Question 15

Which of the following is true about using inheritance in software engineering?

Accepted Answer

A)  Common attributes and behaviors should be factored out of closely related classes and placed into a base class from which the original classes can now inherit. 
B)  It is best to create a huge class library to make it easy for a client to find the most appropriate class for his or her needs. 
C)  A class produced through inheritance should be as large as possible to fully encompass all of the functionality it should offer. 
D)  The standard C++ libraries that are shipped with C++ compilers are usually enough to accomplish anything an application might need to do. 
A)  Common attributes and behaviors should be factored out of closely related classes and placed into a base class from which the original classes can now inherit. 
B)  It is best to create a huge class library to make it easy for a client to find the most appropriate class for his or her needs. 
C)  A class produced through inheritance should be as large as possible to fully encompass all of the functionality it should offer. 
D)  The standard C++ libraries that are shipped with C++ compilers are usually enough to accomplish anything an application might need to do.

Question 16

Theoretically, clients do not need to see the _________ of classes from which they derive other classes.

Accepted Answer

A)  Header files. 
B)  Source code. 
C)  Object code. 
D)  Interface. 
A)  Header files. 
B)  Source code. 
C)  Object code. 
D)  Interface.

Question 17

Which of the following is not a good example of a hierarchy likely to be modeled by inheritance?

Accepted Answer

A)  Airplanes. 
B)  Geometric shapes. 
C)  Animals. 
D)  Prime numbers. 
A)  Airplanes. 
B)  Geometric shapes. 
C)  Animals. 
D)  Prime numbers.

Question 18

Which forms of inheritance are is-a relationships?

Accepted Answer

A)  All forms of inheritance are is-a relationships. 
B)  Only public and private. 
C)  Only public and protected. 
D)  Only public. 
A)  All forms of inheritance are is-a relationships. 
B)  Only public and private. 
C)  Only public and protected. 
D)  Only public.

Question 19

When deriving a class from a protected base class, the public members of the base class become _________ and the protected members of the base class become __________?

Accepted Answer

A)  protected, private 
B)  public, private 
C)  protected, protected 
D)  public, protected 
A)  protected, private 
B)  public, private 
C)  protected, protected 
D)  public, protected

Exam 12: Object-Oriented Programming: Inheritance

Protected base class members cannot be accessed by:

Which of the following is not a kind of inheritance in C++?

Public CommissionEmployee Which of the following is false?

Base class constructors and assignment operators:

When should base class members be declared protected?

From most restrictive to least restrictive, the access modifiers are:

CommissionEmployee first, last, ssn, sales, rate ) The second line:

Suppose class A inherits from base class B. What is the order in which their constructors and destructors will be called when an object of class A is instantiated and then destroyed?

The is-a relationship represents.

Which of the following is most likely a base class of the other three?

To declare class subClass a privately derived class of superClass one would write:

Select the false statement regarding inheritance.

Which of the following is not one of the disadvantages of using the "copy-and-paste" approach to duplicating code from one class into another class?

When an object of a derived class is instantiated, the __________ constructor initializes the _________ members.

Which of the following is true about using inheritance in software engineering?

Theoretically, clients do not need to see the _________ of classes from which they derive other classes.

Which of the following is not a good example of a hierarchy likely to be modeled by inheritance?

Which forms of inheritance are is-a relationships?

When deriving a class from a protected base class, the public members of the base class become _________ and the protected members of the base class become __________?

Introduction to Computers, the Internet and the World Wide Web

Introduction to C Programming

Control Statements, Part 1

Control Statements, Part 2

Functions and an Introduction to Recursion

Arrays and Vectors

Pointers and Pointer-Based Strings

Sequential-Access Files

Classes

Classes: a Deeper Look, Part 2

Operator Overloading; String and Array Objects

Object-Oriented Programming: Polymorphism

Templates

Stream Inputoutput

Exception Handling

File Processing

Class String and String Stream Processing

Searching and Sorting

Data Structures

Standard Template Library Stl

Bits, Characters, C Strings and Structs

Boost Libraries, Technical Report 1 and C0x

Other Topics

ATM Case Study, Part 1: Object-Oriented Design With the Uml

ATM Case Study, Part 2: Implementing an Object-Oriented Design

Game Programming With Ogre

Filters

When an object of a derived class is instantiated, the __ constructor initializes the _ members.

When deriving a class from a protected base class, the public members of the base class become _ and the protected members of the base class become __?