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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

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Package p1 contains the following code:
package p1;
public class Student

  Test class is not available.

  Student class is not available.

  Class result should be declared public.

  Result body is not fully defined.

  Half-n-half Clue


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

  All of these.

  (A), (C) & (E)

  (C) & (E)

  (B), (C) & (E)

  Half-n-half Clue


The concept of multiple inheritance is implemented in Java by
(A) extending two or more classes
(B) extending one class and implementing one or more interfaces
(C) implementing two or more interfaces
(D) all of these


  (A) & (C)


  (B) & (C)

  Half-n-half Clue


Consider the following code:
interface Area

  Method compute() in interface Area should be declared public

  Method compute() in class Room should be declared public

  Interface definition is incomplete

  All of these

  Half-n-half Clue


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?

  private OR protected




  Half-n-half Clue


Which of the following statements about abstract methods/classes in Java are true?
1. An abstract class cannot be instantiated.
2. Constructors cannot be abstract.
3. A subclass of an abstract class must defined the abstract methods.
4. Static methods may be declared abstract.

  Line 1, line 2 and line 3 only

  Line 1 only

  Line 1 and line 2 only

  Line 2 only

  All are true

  Half-n-half Clue


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

  (B) & (C)


  (A) & (C)


  Half-n-half Clue

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