Question 1

An interface can contain defined constants as well as method headings or instead of method headings.

Accepted Answer

A) True 
 B)False  True

Question 2

A class that uses an interface must use the keyword:

Accepted Answer

A)  Extends
B)  Inherits
C)  Super
D)  ImplementsE) All of the above
F) A) and D)

Question 3

A common use of inner classes is :

Accepted Answer

A)  clean up
B)  set up
C)  helper
D)  all of the aboveE) A) and B)
F) B) and D)

Question 4

In Java,a derived class can have ________ base classes) .

Accepted Answer

A)  one
B)  two
C)  three
D)  there is no limitE) A) and D)
F) A) and C)

Question 5

If an inner class contains non static members,then the class name must be modified by the keyword:

Accepted Answer

A)  Final
B)  Static
C)  Void
D)  ProtectedE) B) and C)
F) All of the above

Question 6

When using the clone method from an inherited base class you should account for a _________ exception.

Accepted Answer

A)  CloneNotFoundException
B)  CloneEmptyException
C)  CloneNotSupportedException
D)  CloneNotEmptyExceptionE) A) and B)
F) A) and C)

Question 7

Inner classes available outside the scope of their outer class are modified by the keyword:

Accepted Answer

A)  Public
B)  Private
C)  Protected
D)  Package accessE) A) and C)
F) All of the above A

Question 8

Why does Java only allow the inheritance of only one base class?

Accepted Answer

Java allows only one base clas...

Question 9

What are the rules of total ordering?

Accepted Answer

Total ordering says that the following r...

Question 10

A class that implements an interface but only gives definitions for some of the method headings given in the interface is called a/an:

Accepted Answer

A)  concrete class
B)  abstract class
C)  discrete class
D)  friendly classE) None of the above
F) All of the above

Question 11

What are the semantics of the Comparable interface?

Accepted Answer

The semantics of the Comparable interfac...

Question 12

An inner class definition is local to the outer class definition.

Accepted Answer

A) True 
 B)False

Question 13

An interface may contain:

Accepted Answer

A)  instance variables
B)  primitive variables
C)  constant variables
D)  all of the aboveE) A) and B)
F) None of the above

Question 14

Java interfaces are a way of simulating multiple inheritance.

Accepted Answer

A) True 
 B)False

Question 15

The compareTo method should return _____________ if the calling object equals the parameter.

Accepted Answer

A)  A negative number
B)  Zero
C)  A positive number
D)  NullE) None of the above
F) A) and D)

Question 16

A Java interface is an example of:

Accepted Answer

A)  encapsulation
B)  abstraction
C)  polymorphism
D)  all of the aboveE) B) and D)
F) None of the above

Question 17

The compiler and the run-time system enforces semantics on the Comparable interface.

Accepted Answer

A) True 
 B)False

Question 18

The Comparable interface is in the ______________ package.

Accepted Answer

A)  java.util
B)  java.io
C)  java.awt
D)  java.langE) A) and B)
F) B) and C)

Question 19

A class may only implement one interface.

Accepted Answer

A) True 
 B)False  False

Question 20

Any constant variables defined in an interface must be defined as:

Accepted Answer

A)  public
B)  private
C)  protected
D)  package accessE) A) and B)
F) A) and D)

Exam 13: Interfaces and Inner Classes

An interface can contain defined constants as well as method headings or instead of method headings.

Correct AnswerverifiedTrue

A class that uses an interface must use the keyword:

Correct AnswerverifiedShow Answer

A common use of inner classes is :

Correct AnswerverifiedShow Answer

In Java,a derived class can have ________ base classes) .

Correct AnswerverifiedShow Answer

If an inner class contains non static members,then the class name must be modified by the keyword:

Correct AnswerverifiedShow Answer

When using the clone method from an inherited base class you should account for a _________ exception.

Correct AnswerverifiedShow Answer

Inner classes available outside the scope of their outer class are modified by the keyword:

Correct AnswerverifiedA

Why does Java only allow the inheritance of only one base class?

Correct AnswerverifiedJava allows only one base clas...View AnswerShow Answer

What are the rules of total ordering?

Correct AnswerverifiedTotal ordering says that the following r...View AnswerShow Answer

A class that implements an interface but only gives definitions for some of the method headings given in the interface is called a/an:

Correct AnswerverifiedShow Answer

What are the semantics of the Comparable interface?

Correct AnswerverifiedThe semantics of the Comparable interfac...View AnswerShow Answer

An inner class definition is local to the outer class definition.

Correct AnswerverifiedShow Answer

An interface may contain:

Correct AnswerverifiedShow Answer

Java interfaces are a way of simulating multiple inheritance.

Correct AnswerverifiedShow Answer

The compareTo method should return _____________ if the calling object equals the parameter.

Correct AnswerverifiedShow Answer

A Java interface is an example of:

Correct AnswerverifiedShow Answer

The compiler and the run-time system enforces semantics on the Comparable interface.

Correct AnswerverifiedShow Answer

The Comparable interface is in the ______________ package.

Correct AnswerverifiedShow Answer

A class may only implement one interface.

Correct AnswerverifiedFalse

Any constant variables defined in an interface must be defined as:

Correct AnswerverifiedShow Answer

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True

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A

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Java allows only one base clas...
View Answer

Correct Answer
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Total ordering says that the following r...
View Answer

Correct Answer
verified

Correct Answer
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The semantics of the Comparable interfac...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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False

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