Programming Quiz Two

1. What happens right after the identification of classes in the object-oriented design process?

Determining the class responsibilities

Determining class interaction

Creating UML diagram

Developing SOW

Question 2.2. In object-oriented programming, inheritance is transitive; that means a child class _____.

inherits only from its parent class

inherits only selected methods and fields

inherits all the methods and fields of all its ancestors

does not inherit any methods or fields

Question 3.3. Which of the following are benefits of using inheritance?

Smaller chance of errors

Code is more manageable

Prevents the need to duplicate code, and therefore creates efficiency in the programming process

All of the above

None of the above

Question 4.4. Which of the following statements are true?

Interfaces contain one and only one implemented method, a constructor.

Interfaces are defined inside an abstract class.

All methods defined in an interface must be implemented when used by another class.

A true object-oriented design must contain as least one interface.

Question 5.5. Which of the following statements is/are false?

Abstract methods may or may not contain a method body

Abstract methods may be defined in an abstract class, a regular class or an interface

Abstract methods do not specify a return type

None of the above

All of the above

Question 6.6. When developing an object-oriented application, developers are required to comply with specific _____ or rules defined in a framework.

programming styles

object hierarchies

instantiated classes

contracts

None of the above

Question 7.7. Data/information hiding and encapsulation improves construction and maintenance because:

Programs become more self-documenting.

Procedural programming practices are supported.

Adding additional details is isolated to a single class.

All of the above

None of the above

Question 8.8. What are some of the characteristics of a "good" comment?

Detailed comments should address all aspects of the code and structure

Code markers should be used to show what the developer still needs to do

Comments showing the intent of the code

All of the above

None of the above

Question 9.9. Which of the following allow a programmer to reduce the complexity of an object-oriented program?

Create each class in a separate file

Using packages as a container for logically related items

Using packages to create global types

All of the above

None of the above

Question 10.10. Which of the following declares an abstract method in an abstract Java class?

public abstract void displayResult();

public void abstract displayResult();

public void displayResult{};

public abstract void displayResult() {}

Question 11.11. Given the following class definition, which of the methods defined in ClassB would not be inherited by a derived class?

public class ClassB {

void greatMethod(){

System.out.println("ClassB greatMethod");

}

private void greatPrivateMethod(){

System.out.println("ClassB greatPrivateMethod");

}

public void greatPublicMethod(){

System.out.println("ClassB greatPublicMethod");

}

}

greatMethod

greatPrivateMethod

greatPublicMethod

All three methods are inherited

None of the methods will be inherited

Question 12.12. Which of the following is a proper declaration of an abstract class?

public abstract class Animal {}

public abstract class Animal ()

public class Animal {}

public class abstract Animal {}

All of the above

None of the aboveBottom of Form