Question 1

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.

Question 2

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 3

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 4

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 5

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 6

Which of the following statements is correct?

Accepted Answer

A)  Dependency is a stronger form of aggregation. 
B)  Aggregation indicates high cohesiveness. 
C)  Aggregation indicates low coupling. 
D)  Aggregation is a stronger form of dependency. 
A)  Dependency is a stronger form of aggregation. 
B)  Aggregation indicates high cohesiveness. 
C)  Aggregation indicates low coupling. 
D)  Aggregation is a stronger form of dependency.

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

In a UML diagram, an interface implementation is denoted by ____.

Accepted Answer

A)  A dotted line with a closed arrow tip. 
B)  A solid line with a closed arrow tip. 
C)  A dotted line with an open arrow tip. 
D)  A solid line with an open arrow tip. 
A)  A dotted line with a closed arrow tip. 
B)  A solid line with a closed arrow tip. 
C)  A dotted line with an open arrow tip. 
D)  A solid line with an open arrow tip.

Question 9

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 10

A/an ____ represents a set of objects with the same behavior.

Accepted Answer

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

Question 11

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

Accepted Answer

A)  Class instance variables are available from the CRC cards. 
B)  Class instance variables are available from the javadocs created during the design phase. 
C)  You must determine the class instance variables during implementation phase. 
D)  Class instance variables can be determined from the UML diagrams. 
A)  Class instance variables are available from the CRC cards. 
B)  Class instance variables are available from the javadocs created during the design phase. 
C)  You must determine the class instance variables during implementation phase. 
D)  Class instance variables can be determined from the UML diagrams.

Question 12

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

Accepted Answer

A)  Tire class aggregates Car class. 
B)  Car class aggregates Tire class. 
C)  Car class inherits from Tire class. 
D)  Tire class inherits from Car class. 
A)  Tire class aggregates Car class. 
B)  Car class aggregates Tire class. 
C)  Car class inherits from Tire class. 
D)  Tire class inherits from Car class.

Question 13

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 14

Consider the following code snippet: public class Purse
{
Private Coin[] coins;
) . .
}
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 15

To improve the quality of the public interface of a class, ____.

Accepted Answer

A)  You should maximize cohesion and minimize inheritance. 
B)  You should minimize cohesion and maximize coupling. 
C)  You should maximize cohesion and minimize coupling. 
D)  You should minimize cohesion and maximize aggregation. 
A)  You should maximize cohesion and minimize inheritance. 
B)  You should minimize cohesion and maximize coupling. 
C)  You should maximize cohesion and minimize coupling. 
D)  You should minimize cohesion and maximize aggregation.

Question 16

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

Accepted Answer

A)  Arrows with labels that connect rectangles. 
B)  Double arrows with labels that connect rectangles. 
C)  An oval between two rectangles, connected with arrows. 
D)  Dividing the state rectangle into several parts, one for each state change. 
A)  Arrows with labels that connect rectangles. 
B)  Double arrows with labels that connect rectangles. 
C)  An oval between two rectangles, connected with arrows. 
D)  Dividing the state rectangle into several parts, one for each state change.

Question 17

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 18

Parallel arrays are ____.

Accepted Answer

A)  Two or more arrays or array lists of the same length which each store a part of what could be considered an object. 
B)  Two or more arrays or array lists of the same length. 
C)  Two or more arrays or array lists of the same data type. 
D)  Two or more arrays or array lists that are declared one after the other in a program. 
A)  Two or more arrays or array lists of the same length which each store a part of what could be considered an object. 
B)  Two or more arrays or array lists of the same length. 
C)  Two or more arrays or array lists of the same data type. 
D)  Two or more arrays or array lists that are declared one after the other in a program.

Question 19

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 20

When using the CRC method, if you determine that a class cannot carry out a particular task by itself and needs the help of another class to complete the task, you should ____.

Accepted Answer

A)  Do nothing on this class's CRC card. The task will be shown on the other class's CRC card. 
B)  Add this class onto the other class's CRC card as a collaborator. 
C)  Add the other class onto this class's CRC card as a collaborator. 
D)  Add each class onto the other class's CRC card as a collaborator. 
A)  Do nothing on this class's CRC card. The task will be shown on the other class's CRC card. 
B)  Add this class onto the other class's CRC card as a collaborator. 
C)  Add the other class onto this class's CRC card as a collaborator. 
D)  Add each class onto the other class's CRC card as a collaborator.

Exam 12: Object-Oriented Design

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

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

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

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

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

Which of the following statements is correct?

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

In a UML diagram, an interface implementation is denoted by ____.

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

A/an ____ represents a set of objects with the same behavior.

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

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

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

Consider the following code snippet: public class Purse { Private Coin[] coins; ) . . } This code is best described as an example of ____.

To improve the quality of the public interface of a class, ____.

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

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

Parallel arrays are ____.

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

When using the CRC method, if you determine that a class cannot carry out a particular task by itself and needs the help of another class to complete the task, you should ____.

Introduction

Using Objects

Implementing Classes

Fundamental Data Types

Decisions

Loops

Arrays and Array Lists

Designing Classes

Inheritance

Interfaces

Inputoutput and Exception Handling

Recursion

Sorting and Searching

The Java Collections Framework

Basic Data Structures

Tree Structures

Generic Classes

Graphical User Interfaces

Streams and Binary Inputoutput

Multithreading

Internet Networking

Relational Databases

XML

Web Applications

Filters