Question 1

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 2

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 3

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

Accepted Answer

A)  Customer aggregates BankAccount, indicating that a customer may have 2 bank accounts. 
B)  BankAccount aggregates Customer, indicating that 2 customers may share a bank account. 
C)  BankAccount depends on Customer, indicating that many customers may have 2 bank accounts. 
D)  Customer depends on BankAccount, indicating that a customer may have 2 bank accounts. 
A)  Customer aggregates BankAccount, indicating that a customer may have 2 bank accounts. 
B)  BankAccount aggregates Customer, indicating that 2 customers may share a bank account. 
C)  BankAccount depends on Customer, indicating that many customers may have 2 bank accounts. 
D)  Customer depends on BankAccount, indicating that a customer may have 2 bank accounts.

Question 4

You are designing a software solution for a veterinary clinic. The clinic provides various services for each pet on each visit. You have decided that the following classes are needed: Customer, Address, Pet, and Visit. Which of these should be represented as aggregation?

Accepted Answer

A)  Customer class aggregates Address, Pet, and Visit classes. 
B)  Visit class aggregates Address class. 
C)  Pet class aggregates Address class. 
D)  Pet class aggregates Customer class. 
A)  Customer class aggregates Address, Pet, and Visit classes. 
B)  Visit class aggregates Address class. 
C)  Pet class aggregates Address class. 
D)  Pet class aggregates Customer class.

Question 5

Consider the following code snippet:
Public class Manager extends Employee
{
Private Project[] projects;
Private Address address;
) . .
}
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 6

Consider the following code snippet:
Public class Motorcycle
{
Private Tire[] tires;
) . .
}
Which of the following statements correctly describes the relationship between the Motorcycle and Tire classes?

Accepted Answer

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

Question 7

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 8

Which of the following statements about class attributes is true?

Accepted Answer

A)  An attribute always corresponds to an instance variable of the class. 
B)  An attribute is an externally observable property that objects of the class have. 
C)  An attribute is used to represent aggregation with another class. 
D)  Attributes cannot be represented in UML diagrams. 
A)  An attribute always corresponds to an instance variable of the class. 
B)  An attribute is an externally observable property that objects of the class have. 
C)  An attribute is used to represent aggregation with another class. 
D)  Attributes cannot be represented in UML diagrams.

Question 9

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 uses relationship. 
C)  Aggregation represents the is-a relationship, while inheritance represents the uses 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 uses relationship. 
C)  Aggregation represents the is-a relationship, while inheritance represents the uses relationship. 
D)  Aggregation represents the has-a relationship, while dependence represents the is-a relationship.

Question 10

Which of the following can be used to record the behavior of classes?

Accepted Answer

A)  Javadoc comments 
B)  Nouns and verbs in the problem description 
C)  Polymorphism 
D)  UML notation 
A)  Javadoc comments 
B)  Nouns and verbs in the problem description 
C)  Polymorphism 
D)  UML notation

Question 11

Consider the following code snippet:
Public class Purse
{
Private Coin[] coins;
) . .
}
Which of the following statements is correct?

Accepted Answer

A)  Purse aggregates Coin. 
B)  Coin depends on Purse. 
C)  The Coin class must be declared as an inner class within Purse. 
D)  Coin inherits from Purse. 
A)  Purse aggregates Coin. 
B)  Coin depends on Purse. 
C)  The Coin class must be declared as an inner class within Purse. 
D)  Coin inherits from Purse.

Question 12

Which of the following statements will correctly put the PowerBoat class into a package named VesselPkg?

Accepted Answer

A)  import VesselPkg; 
B)  import VesselPkg.*; 
C)  package VesselPkg; 
D)  package VesselPkg.*; 
A)  import VesselPkg; 
B)  import VesselPkg.*; 
C)  package VesselPkg; 
D)  package VesselPkg.*;

Question 13

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 14

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 15

A Quiz class contains an array of Question objects. This is best described as an example of ____.

Accepted Answer

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

Question 16

UML means____.

Accepted Answer

A)  Unified Mode Language 
B)  User Modeling Language 
C)  User Mode Language. 
D)  Unified Modeling Language. 
A)  Unified Mode Language 
B)  User Modeling Language 
C)  User Mode Language. 
D)  Unified Modeling Language.

Question 17

Which of the following code snippets denotes that the Lime class inherits from the Citrus class?

Accepted Answer

A) public class Lime extends Citrus B) public class Citrus extends Lime C) public class Lime { Private ArrayList fruits; } D) public class Citrus { Private ArrayList limes; } A) public class Lime extends Citrus B) public class Citrus extends Lime C) public class Lime { Private ArrayList fruits; } D) public class Citrus { Private ArrayList limes; }

Question 18

You have determined a need for a Book class and a Page class in your program. Which relationship is most appropriate between these classes?

Accepted Answer

A)  Inheritance 
B)  Aggregation 
C)  Dependency 
D)  Interface implementation 
A)  Inheritance 
B)  Aggregation 
C)  Dependency 
D)  Interface implementation

Question 19

You are designing an application to support a veterinary clinic. Which of the following probably should NOT be represented as an object?

Accepted Answer

A)  Pet 
B)  Customer 
C)  Medical service performed 
D)  Drug dosage 
A)  Pet 
B)  Customer 
C)  Medical service performed 
D)  Drug dosage

Question 20

Which of the following would be an appropriate name for a game-related class?

Accepted Answer

A)  FinalizeLevelOne 
B)  InitialLevel 
C)  ResetTheCurrentLevel 
D)  AscendToFinalLevel 
A)  FinalizeLevelOne 
B)  InitialLevel 
C)  ResetTheCurrentLevel 
D)  AscendToFinalLevel

Exam 12: Object-Oriented Design

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

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

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

You are designing a software solution for a veterinary clinic. The clinic provides various services for each pet on each visit. You have decided that the following classes are needed: Customer, Address, Pet, and Visit. Which of these should be represented as aggregation?

Consider the following code snippet: Public class Manager extends Employee { Private Project[] projects; Private Address address; ) . . } Which of the following statements is NOT correct?

Consider the following code snippet: Public class Motorcycle { Private Tire[] tires; ) . . } Which of the following statements correctly describes the relationship between the Motorcycle and Tire classes?

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

Which of the following statements about class attributes is true?

Which of the followings statements about class relationships is correct?

Which of the following can be used to record the behavior of classes?

Consider the following code snippet: Public class Purse { Private Coin[] coins; ) . . } Which of the following statements is correct?

Which of the following statements will correctly put the PowerBoat class into a package named VesselPkg?

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

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?

A Quiz class contains an array of Question objects. This is best described as an example of ____.

UML means____.

Which of the following code snippets denotes that the Lime class inherits from the Citrus class?

You have determined a need for a Book class and a Page class in your program. Which relationship is most appropriate between these classes?

You are designing an application to support a veterinary clinic. Which of the following probably should NOT be represented as an object?

Which of the following would be an appropriate name for a game-related class?

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