Question 1

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

Accepted Answer

A) Product inherits from LineItem. 
B) Product aggregates LineItem. 
C) LineItem aggregates Product. 
D) LineItem inherits from Product. 
A) Product inherits from LineItem. 
B) Product aggregates LineItem. 
C) LineItem aggregates Product. 
D) LineItem inherits from Product.

Question 2

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

Accepted Answer

A) Address inherits from Invoice. 
B) Invoice aggregates Address. 
C) Address aggregates Invoice. 
D) Invoice inherits from Address. 
A) Address inherits from Invoice. 
B) Invoice aggregates Address. 
C) Address aggregates Invoice. 
D) Invoice inherits from Address.

Question 3

How does a UML diagram denote classes and their attributes and methods?

Accepted Answer

A) A class rectangle contains the class name in the top, methods in the middle, and attributes in the bottom. 
B) A class rectangle contains the class name in the top, attributes in the middle, and methods in the bottom. 
C) A class rectangle contains the methods in the top, class name in the middle, and attributes in the bottom. 
D) A class rectangle contains the attributes in the top, methods in the middle, and class name in the bottom. 
A) A class rectangle contains the class name in the top, methods in the middle, and attributes in the bottom. 
B) A class rectangle contains the class name in the top, attributes in the middle, and methods in the bottom. 
C) A class rectangle contains the methods in the top, class name in the middle, and attributes in the bottom. 
D) A class rectangle contains the attributes in the top, methods in the middle, and class name in the bottom.

Question 4

Which of the followings statements about class relationships is correct?

Accepted Answer

A) Inheritance represents the is-a relationship, while aggregation represents the has-a relationship. 
B) Inheritance represents the has-a relationship, while dependency represents the knows about relationship. 
C) Aggregation represents the is-a relationship, while inheritance represents the knows about relationship. 
D) Aggregation represents the has-a relationship, while dependence represents the is-a relationship. 
A) Inheritance represents the is-a relationship, while aggregation represents the has-a relationship. 
B) Inheritance represents the has-a relationship, while dependency represents the knows about relationship. 
C) Aggregation represents the is-a relationship, while inheritance represents the knows about relationship. 
D) Aggregation represents the has-a relationship, while dependence represents the is-a relationship.

Question 5

The United States has few legal protections against computer ____ ?

Accepted Answer

A) Theft 
B) Privacy invasion 
C) Programmers 
D) Sales 
A) Theft 
B) Privacy invasion 
C) Programmers 
D) Sales

Question 6

Select a code segment to complete the Team class, so that it reflects an aggregation relationship between Team and Player.

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Question 7

Which of the following would be an appropriate name for a class used in an inventory application?

Accepted Answer

A) Product 
B) InitializeInventoryLevel 
C) ResetCurrentInventoryLevel 
D) ReceiveNewProducts 
A) Product 
B) InitializeInventoryLevel 
C) ResetCurrentInventoryLevel 
D) ReceiveNewProducts

Question 8

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 9

You are designing a software solution for an automobile rental company.A customer may rent only a single auto at a given time.You have decided that the following classes are needed: Auto, Customer, Address, Rental Contract.Which of these should be represented as aggregation?

Accepted Answer

A) Rental Contract class aggregates Address class 
B) Rental Contract class aggregates Customer and Address classes. 
C) Rental Contract class aggregates Customer, Address, and Auto classes. 
D) Rental Contract class does not aggregate any of the other classes. 
A) Rental Contract class aggregates Address class 
B) Rental Contract class aggregates Customer and Address classes. 
C) Rental Contract class aggregates Customer, Address, and Auto classes. 
D) Rental Contract class does not aggregate any of the other classes.

Question 10

When designing classes, if you find classes with common behavior you should ____.

Accepted Answer

A) Combine them all into a single class. 
B) Place some common behavior into a superclass. 
C) Place the common behavior into a subclass. 
D) Give them similar names. 
A) Combine them all into a single class. 
B) Place some common behavior into a superclass. 
C) Place the common behavior into a subclass. 
D) Give them similar names.

Question 11

Select a code segment to complete the Player class, so that it reflects an inheritance relationship between Player and Person.

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Question 12

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

Accepted Answer

A) LineItem inherits from Invoice. 
B) LineItem aggregates Invoice. 
C) Invoice aggregates LineItem. 
D) Invoice inherits from LineItem. 
A) LineItem inherits from Invoice. 
B) LineItem aggregates Invoice. 
C) Invoice aggregates LineItem. 
D) Invoice inherits from LineItem.

Question 13

Which of the following code snippets denotes that the Kitchen class depends on the Stove class?

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Question 14

Consider the following code snippet:   Which of the following statements is NOT correct?

Accepted Answer

A) Manager inherits from Employee. 
B) Address aggregates Manager. 
C) Manager aggregates Address. 
D) Manager aggregates Project. 
A) Manager inherits from Employee. 
B) Address aggregates Manager. 
C) Manager aggregates Address. 
D) Manager aggregates Project.

Question 15

Consider the following code snippet:   This code is best described as an example of ____.

Accepted Answer

A) Inheritance. 
B) Aggregation. 
C) Polymorphism. 
D) Association. 
A) Inheritance. 
B) Aggregation. 
C) Polymorphism. 
D) Association.

Question 16

When documenting discovered classes and methods during the design phase, you should ____.

Accepted Answer

A) Create a Java source file for each class, write the method signatures, and use javadoc comments to describe the methods, but leave the method bodies blank. 
B) Create a Java source file for each class and write code to implement all of its methods, and use javadoc comments to document them. 
C) Create a Java source file for each class, use javadoc comments to document the methods that are to be added later, but do not write any code for the methods. 
D) Documentation of methods should not be done during the design phase. 
A) Create a Java source file for each class, write the method signatures, and use javadoc comments to describe the methods, but leave the method bodies blank. 
B) Create a Java source file for each class and write code to implement all of its methods, and use javadoc comments to document them. 
C) Create a Java source file for each class, use javadoc comments to document the methods that are to be added later, but do not write any code for the methods. 
D) Documentation of methods should not be done during the design phase.

Question 17

The dependency relationship is sometimes referred to as the ____ relationship.

Accepted Answer

A) is-a 
B) has-a 
C) depends-on 
D) knows-about 
A) is-a 
B) has-a 
C) depends-on 
D) knows-about

Question 18

Suppose that the invoice-printing application from section 12.3 needs to be enhanced by including the computation and printing of sales taxes as needed.Since some vendors charge no sales taxes, the original Invoice class needs to be preserved.Select the code segment that best illustrates reuse of the existing Invoice class.

Accepted Answer

A)   
B)   
C)   
D)   
A)   
B)   
C)   
D)

Question 19

Consider the following code snippet:   Which of the following statements is NOT correct?

Accepted Answer

A) SailBoat inherits from Vessel. 
B) Catamaran inherits from Vessel. 
C) Catamaran inherits from Sailboat. 
D) Catamaran depends on SailBoat. 
A) SailBoat inherits from Vessel. 
B) Catamaran inherits from Vessel. 
C) Catamaran inherits from Sailboat. 
D) Catamaran depends on SailBoat.

Question 20

A/an ____ is used to create objects with the same behavior.

Accepted Answer

A) Association 
B) Aggregation 
C) Dependency 
D) Class 
A) Association 
B) Aggregation 
C) Dependency 
D) Class

Exam 12: Object-Oriented Design

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

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

How does a UML diagram denote classes and their attributes and methods?

Which of the followings statements about class relationships is correct?

The United States has few legal protections against computer ____ ?

Select a code segment to complete the Team class, so that it reflects an aggregation relationship between Team and Player.

Which of the following would be an appropriate name for a class used in an inventory application?

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

You are designing a software solution for an automobile rental company.A customer may rent only a single auto at a given time.You have decided that the following classes are needed: Auto, Customer, Address, Rental Contract.Which of these should be represented as aggregation?

When designing classes, if you find classes with common behavior you should ____.

Select a code segment to complete the Player class, so that it reflects an inheritance relationship between Player and Person.

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

Which of the following code snippets denotes that the Kitchen class depends on the Stove class?

Consider the following code snippet: Which of the following statements is NOT correct?

Consider the following code snippet: This code is best described as an example of ____.

When documenting discovered classes and methods during the design phase, you should ____.

The dependency relationship is sometimes referred to as the ____ relationship.

Consider the following code snippet: Which of the following statements is NOT correct?

A/an ____ is used to create objects with the same behavior.

Introduction

Using Objects

Implementing Classes

Fundamental Data Types

Decisions

Loops

Arrays and Array Lists

Designing Classes

Inheritance

Interfaces

Input/Output and Exception Handling

Recursion

Sorting and Searching

The Java Collections Framework

Basic Data Structures

Tree Structures

Generic Classes

Stream Processing

Graphical User Interfaces

Advanced Input/Output

Multithreading

Internet Networking

Relational Databases

XML

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