Question 1

Which of the following is NOT a reason to place classes into a package?

Accepted Answer

A)  To avoid name clashes 
B)  To organize related classes 
C)  To show authorship of source code for classes 
D)  To make it easier to include a set of frequently used but unrelated classes 
A)  To avoid name clashes 
B)  To organize related classes 
C)  To show authorship of source code for classes 
D)  To make it easier to include a set of frequently used but unrelated classes

Question 2

Given the following diagram showing class relationships:   What type of relationship is shown between Invoice and Product?

Accepted Answer

A)  Product inherits from Invoice. 
B)  Product aggregates Invoice. 
C)  Invoice inherits from Product. 
D)  Invoice is dependent on Product. 
A)  Product inherits from Invoice. 
B)  Product aggregates Invoice. 
C)  Invoice inherits from Product. 
D)  Invoice is dependent on Product.

Question 3

You have determined the need for a File class and a Folder class in your program. Which of the following would best describe the relationship between these classes?

Accepted Answer

A)  Aggregation 
B)  Association 
C)  Composition 
D)  Inheritance 
A)  Aggregation 
B)  Association 
C)  Composition 
D)  Inheritance

Question 4

In a UML diagram, the relationship symbol shown below denotes ____.

Accepted Answer

A)  inheritance 
B)  aggregation 
C)  dependency 
D)  interface implementation 
A)  inheritance 
B)  aggregation 
C)  dependency 
D)  interface implementation

Question 5

Which statement correctly describes the class relationship shown in this diagram?

Accepted Answer

A)  Quiz class depends on Question class 
B)  Question class aggregates Quiz class 
C)  Quiz class aggregates Question class. 
D)  Question class inherits from Quiz class. 
A)  Quiz class depends on Question class 
B)  Question class aggregates Quiz class 
C)  Quiz class aggregates Question class. 
D)  Question class inherits from Quiz class.

Question 6

You are designing an application to support an automobile rental agency. Which of the following probably should NOT be represented as an object?

Accepted Answer

A)  Auto 
B)  Customer 
C)  Payment amount 
D)  Rental contract 
A)  Auto 
B)  Customer 
C)  Payment amount 
D)  Rental contract

Question 7

Given the following diagram showing class relationships:   What of the following best describes the type of relationship shown between Bank and Customer?

Accepted Answer

A)  Customer aggregates Bank, indicating that a customer may deal with many banks. 
B)  Bank aggregates Customer, indicating that a bank may deal with many customers. 
C)  Bank depends on Customer, indicating that a bank may deal with many customers. 
D)  Customer depends on Bank, indicating that a customer may deal with many banks. 
A)  Customer aggregates Bank, indicating that a customer may deal with many banks. 
B)  Bank aggregates Customer, indicating that a bank may deal with many customers. 
C)  Bank depends on Customer, indicating that a bank may deal with many customers. 
D)  Customer depends on Bank, indicating that a customer may deal with many banks.

Question 8

When using the CRC method, other classes that are needed to fulfill the responsibilities of a given class are called its ____.

Accepted Answer

A)  Related classes. 
B)  Responsible classes. 
C)  Collaborators. 
D)  Concurrent classes. 
A)  Related classes. 
B)  Responsible classes. 
C)  Collaborators. 
D)  Concurrent classes.

Question 9

If you do not include a package statement at the top of your class source file, its classes will be placed in which package?

Accepted Answer

A)  java.lang 
B)  java.util 
C)  the default package, which has no name 
D)  java.awt 
A)  java.lang 
B)  java.util 
C)  the default package, which has no name 
D)  java.awt

Question 10

During the implementation phase, which of the following statements is true?

Accepted Answer

A)  Method parameter variables are available from the CRC cards. 
B)  Method parameter variables are available from the javadocs created during the design phase. 
C)  You must determine the method parameter variables during implementation phase. 
D)  Method parameter variables are available from the UML diagrams. 
A)  Method parameter variables are available from the CRC cards. 
B)  Method parameter variables are available from the javadocs created during the design phase. 
C)  You must determine the method parameter variables during implementation phase. 
D)  Method parameter variables are available from the UML diagrams.

Question 11

Consider the following code snippet:
Public class PowerBoat extends Vessel
{
Private Engine[] engines;
) . .
}
This code is best described as an example of ____.

Accepted Answer

A)  Inheritance and multiplicities. 
B)  Aggregation and association. 
C)  Inheritance and aggregation. 
D)  Inheritance and dependency. 
A)  Inheritance and multiplicities. 
B)  Aggregation and association. 
C)  Inheritance and aggregation. 
D)  Inheritance and dependency.

Question 12

Dependency between classes denotes that ____.

Accepted Answer

A)  Objects of one class inherit from objects of its superclass. 
B)  Objects of one class can be inherited by its subclasses. 
C)  Objects of one class implement an interface. 
D)  Methods in the objects of one class use an object of another class. 
A)  Objects of one class inherit from objects of its superclass. 
B)  Objects of one class can be inherited by its subclasses. 
C)  Objects of one class implement an interface. 
D)  Methods in the objects of one class use an object of another class.

Question 13

Under which of the following conditions would the public interface of a class be considered cohesive?

Accepted Answer

A)  All of its features are public and none of its features are static. 
B)  The quality of the public interface is rated as moderate to high. 
C)  All of its features are related to the concept that the class represents. 
D)  It is obvious that the public interface refers to multiple concepts. 
A)  All of its features are public and none of its features are static. 
B)  The quality of the public interface is rated as moderate to high. 
C)  All of its features are related to the concept that the class represents. 
D)  It is obvious that the public interface refers to multiple concepts.

Question 14

When using CRC cards, UML diagrams should be created ___.

Accepted Answer

A)  Prior to discovering classes. 
B)  After you have discovered classes and their relationships. 
C)  During the implementation phase. 
D)  To produce final documentation of the system. 
A)  Prior to discovering classes. 
B)  After you have discovered classes and their relationships. 
C)  During the implementation phase. 
D)  To produce final documentation of the system.

Question 15

Consider the following code snippet:
Public class Motorcycle extends Vehicle
{ ) . . }
Which of the following statements correctly describes the relationship between the Motorcycle and Vehicle classes?

Accepted Answer

A)  Motorcycle exhibits the has-a relationship with regards to Vehicle. 
B)  Motorcycle exhibits the is-a relationship with regard to Vehicle. 
C)  Vehicle exhibits the has-a relationship with regards to Motorcycle. 
D)  Vehicle exhibits the is-a relationship with regards to Motorcycle. 
A)  Motorcycle exhibits the has-a relationship with regards to Vehicle. 
B)  Motorcycle exhibits the is-a relationship with regard to Vehicle. 
C)  Vehicle exhibits the has-a relationship with regards to Motorcycle. 
D)  Vehicle exhibits the is-a relationship with regards to Motorcycle.

Question 16

Given the following diagram:   What does this diagram indicate about the relationship between the customers and bank accounts?

Accepted Answer

A)  A bank account may be owned by only one customer. 
B)  A bank account may be owned by one or more customers. 
C)  A customer may have only one bank account. 
D)  A customer may have one or more bank accounts. 
A)  A bank account may be owned by only one customer. 
B)  A bank account may be owned by one or more customers. 
C)  A customer may have only one bank account. 
D)  A customer may have one or more bank accounts.

Question 17

You are designing a software solution for an automobile rental company. You have decided that the following nouns apply to the requirements: Auto, Customer, Address, Rental Contract, Mileage, Rental Date, Daily Rate, Total. Which of these should be represented as instance variables?

Accepted Answer

A)  Mileage 
B)  Mileage, Daily Rate. 
C)  Mileage, Rental Date, Daily Rate. 
D)  Mileage, Rental Date, Daily Rate, Total. 
A)  Mileage 
B)  Mileage, Daily Rate. 
C)  Mileage, Rental Date, Daily Rate. 
D)  Mileage, Rental Date, Daily Rate, Total.

Question 18

You are designing a software solution for an automobile rental company. You have decided that the following nouns apply to the requirements: Auto, Customer, Address, Rental Contract, Mileage, Rental Date, Daily Rate, Total. Which of these should be represented as classes?

Accepted Answer

A)  All of them. 
B)  Auto, Customer, Address, Rental Contract. 
C)  Auto, Customer, Address, Rental Contract, Mileage. 
D)  Auto, Customer, Address, Rental Contract, Mileage, Rental Date, Daily Rate. 
A)  All of them. 
B)  Auto, Customer, Address, Rental Contract. 
C)  Auto, Customer, Address, Rental Contract, Mileage. 
D)  Auto, Customer, Address, Rental Contract, Mileage, Rental Date, Daily Rate.

Question 19

A CRC card describes ____.

Accepted Answer

A)  A class, its responsibilities, and its collaborating classes. 
B)  A class, its methods, and its constructors. 
C)  A class, its relationships, and its collaborating classes. 
D)  A class, its requirements, and its concurrent classes. 
A)  A class, its responsibilities, and its collaborating classes. 
B)  A class, its methods, and its constructors. 
C)  A class, its relationships, and its collaborating classes. 
D)  A class, its requirements, and its concurrent classes.

Question 20

When using UML to create state diagrams, a state is denoted by ____.

Accepted Answer

A)  A rectangle with double border. 
B)  A rectangle with rounded corners. 
C)  An oval with double border. 
D)  A standard rectangle with square corners. 
A)  A rectangle with double border. 
B)  A rectangle with rounded corners. 
C)  An oval with double border. 
D)  A standard rectangle with square corners.

Exam 12: Object-Oriented Design

Which of the following is NOT a reason to place classes into a package?

Given the following diagram showing class relationships: What type of relationship is shown between Invoice and Product?

You have determined the need for a File class and a Folder class in your program. Which of the following would best describe the relationship between these classes?

In a UML diagram, the relationship symbol shown below denotes ____.

Which statement correctly describes the class relationship shown in this diagram?

You are designing an application to support an automobile rental agency. Which of the following probably should NOT be represented as an object?

Given the following diagram showing class relationships: What of the following best describes the type of relationship shown between Bank and Customer?

When using the CRC method, other classes that are needed to fulfill the responsibilities of a given class are called its ____.

If you do not include a package statement at the top of your class source file, its classes will be placed in which package?

During the implementation phase, which of the following statements is true?

Consider the following code snippet: Public class PowerBoat extends Vessel { Private Engine[] engines; ) . . } This code is best described as an example of ____.

Dependency between classes denotes that ____.

Under which of the following conditions would the public interface of a class be considered cohesive?

When using CRC cards, UML diagrams should be created ___.

Consider the following code snippet: Public class Motorcycle extends Vehicle { ) . . } Which of the following statements correctly describes the relationship between the Motorcycle and Vehicle classes?

Given the following diagram: What does this diagram indicate about the relationship between the customers and bank accounts?

You are designing a software solution for an automobile rental company. You have decided that the following nouns apply to the requirements: Auto, Customer, Address, Rental Contract, Mileage, Rental Date, Daily Rate, Total. Which of these should be represented as instance variables?

You are designing a software solution for an automobile rental company. You have decided that the following nouns apply to the requirements: Auto, Customer, Address, Rental Contract, Mileage, Rental Date, Daily Rate, Total. Which of these should be represented as classes?

A CRC card describes ____.

When using UML to create state diagrams, a state is denoted by ____.

Introduction

Fundamental Data Types

Decisionseasy

Loops

Methods

Arrays and Arraylists

Inputoutput and Exception Handling

Objects and Classes

Inheritance and Interfaces

Graphical User Interfaces

Advanced User Interfaces

Recursion

Sorting and Searching

The Java Collections Framework

Basic Data Structures

Tree Structures

Generic Classes

Streams and Binary Inputoutput

Multithreading

Internet Networking

Relational Databases

XML

Web Applications

Filters