Question 1

Consider the following code snippet:
Public class Motorcycle extends Vehicle
{
Private Tire[] tires;
) . .
}
This code is best described as an example of ____.

Accepted Answer

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

Question 2

Before you begin designing a solution, you should ____.

Accepted Answer

A)  Document the methods that will be needed. 
B)  Gather and document all requirements for the program in plain English. 
C)  Determine the classes that will be needed. 
D)  Create the UML diagrams to represent the classes. 
A)  Document the methods that will be needed. 
B)  Gather and document all requirements for the program in plain English. 
C)  Determine the classes that will be needed. 
D)  Create the UML diagrams to represent the classes.

Question 3

A class (ClassOne) is considered to have a dependency on another class (ClassTwo) under which of the following conditions?

Accepted Answer

A)  Each class uses objects of the other. 
B)  The public interfaces of both classes are cohesive. 
C)  ClassTwo uses objects of ClassOne. 
D)  ClassOne uses objects of ClassTwo. 
A)  Each class uses objects of the other. 
B)  The public interfaces of both classes are cohesive. 
C)  ClassTwo uses objects of ClassOne. 
D)  ClassOne uses objects of ClassTwo.

Question 4

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 5

In a UML diagram, inheritance is denoted by ____.

Accepted Answer

A)  A solid line with a diamond-shaped symbol next to the superclass. 
B)  A solid line with a closed arrow tip pointing to the superclass. 
C)  A dotted line with an open arrow tip pointing to the superclass. 
D)  A solid line with an open arrow tip pointing to the superclass. 
A)  A solid line with a diamond-shaped symbol next to the superclass. 
B)  A solid line with a closed arrow tip pointing to the superclass. 
C)  A dotted line with an open arrow tip pointing to the superclass. 
D)  A solid line with an open arrow tip pointing to the superclass.

Question 6

The final step of the design phase recommended by the textbook is to ____.

Accepted Answer

A)  Write the documentation of the discovered classes and methods 
B)  Write the code for each class and all of its methods. 
C)  Identify the classes and methods that will be required. 
D)  Create the UML diagrams to represent the classes. 
A)  Write the documentation of the discovered classes and methods 
B)  Write the code for each class and all of its methods. 
C)  Identify the classes and methods that will be required. 
D)  Create the UML diagrams to represent the classes.

Question 7

Consider the following code snippet:
Public class SailBoat extends Vessel
{ ) . . }
Public class Catamaran extends SailBoat
{ ) . . }
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 8

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 9

How does a UML diagram denote a multiplicity of one or more in an aggregation relationship?

Accepted Answer

A)  * 
B)  1..* 
C)  *..1 
D)  1..n 
A)  * 
B)  1..* 
C)  *..1 
D)  1..n

Question 10

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 11

Consider the following code snippet:
Public class SailBoat extends Vessel
{
Private Engine[] engines;
Private Sail mainsail;
) . .
}
Which of the following statements is NOT correct?

Accepted Answer

A)  SailBoat inherits from Vessel. 
B)  Sail depends on Sailboat. 
C)  Sailboat aggregates Engine. 
D)  SailBoat aggregates Sail. 
A)  SailBoat inherits from Vessel. 
B)  Sail depends on Sailboat. 
C)  Sailboat aggregates Engine. 
D)  SailBoat aggregates Sail.

Question 12

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

Accepted Answer

A)  public class Kitchen extends Stove 
B)  public class Stove
{
Private Kitchen[] kitchens;
} 
C)  public class Kitchen
{
Private Stove aStove;
} 
D)  public class Kitchen implements Stove 
A)  public class Kitchen extends Stove 
B)  public class Stove
{
Private Kitchen[] kitchens;
} 
C)  public class Kitchen
{
Private Stove aStove;
} 
D)  public class Kitchen implements Stove

Question 13

____ is often described as the has-a relationship.

Accepted Answer

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

Question 14

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 15

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 16

Which of the following questions should you ask yourself in order to determine if you have named your class properly?

Accepted Answer

A)  Does the class name contain 8 or fewer characters? 
B)  Is the class name a verb? 
C)  Can I visualize an object of the class? 
D)  Does the class name describe the tasks that this class will accomplish? 
A)  Does the class name contain 8 or fewer characters? 
B)  Is the class name a verb? 
C)  Can I visualize an object of the class? 
D)  Does the class name describe the tasks that this class will accomplish?

Question 17

In a UML diagram, dependency is denoted by ____.

Accepted Answer

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

Question 18

Classes often correspond to ____ in a requirements description.

Accepted Answer

A)  Verbs 
B)  Nouns 
C)  Dependencies 
D)  Relationships 
A)  Verbs 
B)  Nouns 
C)  Dependencies 
D)  Relationships

Question 19

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 20

Which of the following code snippets denotes that the Fleet class aggregates the Taxi class?

Accepted Answer

A) public class Fleet extends Taxi B) public class Taxi extends Fleet C) public class Fleet { Private ArrayList taxicabs; } D) public class Taxi { Private Fleet myFleet; } A) public class Fleet extends Taxi B) public class Taxi extends Fleet C) public class Fleet { Private ArrayList taxicabs; } D) public class Taxi { Private Fleet myFleet; }

Exam 12: Object-Oriented Design

Consider the following code snippet: Public class Motorcycle extends Vehicle { Private Tire[] tires; ) . . } This code is best described as an example of ____.

Before you begin designing a solution, you should ____.

A class (ClassOne) is considered to have a dependency on another class (ClassTwo) under which of the following conditions?

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

In a UML diagram, inheritance is denoted by ____.

The final step of the design phase recommended by the textbook is to ____.

Consider the following code snippet: Public class SailBoat extends Vessel { ) . . } Public class Catamaran extends SailBoat { ) . . } Which of the following statements is NOT correct?

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

How does a UML diagram denote a multiplicity of one or more in an aggregation relationship?

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

Consider the following code snippet: Public class SailBoat extends Vessel { Private Engine[] engines; Private Sail mainsail; ) . . } Which of the following statements is NOT correct?

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

____ is often described as the has-a relationship.

Parallel arrays are ____.

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

Which of the following questions should you ask yourself in order to determine if you have named your class properly?

In a UML diagram, dependency is denoted by ____.

Classes often correspond to ____ in a requirements description.

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

Which of the following code snippets denotes that the Fleet class aggregates the Taxi class?

Introduction

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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

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Streams and Binary Inputoutput

Multithreading

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