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Java Programming : Classes and Keywords: Multiple Choice


Answer the following questions about classes and reserved keywords as used in the Java programming language.

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Multiple choice

Your Performance  

1.

Which of the following are not keywords?
(A) NULL
(B) implements
(C) protected
(D) extended
(E) string

  (A), (D) & (E)

  (D) & (E)

  (D)

  (C), (D) & (E)

  Half-n-half Clue
 

2.

Which of the following are keywords?
(A) switch
(B) integer
(C) default
(D) boolean
(E) object

  (E)

  (D)

  (B) & (C)

  (A) & (C)

  Half-n-half Clue
 

3.

Which of the following keywords are used to control access to a class member?
(A) default
(B) abstract
(C) protected
(D) interface
(E) public

  (A), (C) & (E)

  (C) & (E)

  (B), (C) & (E)

  All of these.

  Half-n-half Clue
 

4.

The keywords reserved but not used in the initial version of Java are:
(A) union
(B) const
(C) inner
(D) goto
(E) boolean
(F) synchronized

  All of these.

  (B),(C) & (D)

  (A), (C) & (E)

  (C) & (E)

  Half-n-half Clue
 

5.

We would like to make a member of a class visible in all subclasses regardless of what package they are in. Which one of the following keywords would achieve this?

  protected

  private

  public

  private OR protected

  Half-n-half Clue
 

6.

The use of protected keyword to a member in a class will restrict its visibility as follows:

  Visible in all classes in the same package and subclasses in other packages.

  Visible only inside the package.

  Visible only in the class where it is declared.

  Visible only in the class and its subclass in the same package.

  Half-n-half Clue
 

7.

Which of the following defines a legal abstract class?

  class abstract Vehicle {<br>
              abstract void display(); }

  abstract Vehicle {<br>
              abstract void display(); }

  abstract class Vehicle {<br>
              abstract void display(); }

  abstract class Vehicle {<br>
              abstract void display(); {<br>
                System.out.println("Car"); }}

  class Vehicle {<br>
              abstract void display(); }

  Half-n-half Clue
 


 
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