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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.

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 and its subclass in the same package.

  Visible only in the class where it is declared.

  Half-n-half Clue
 

2.

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

  (C) & (E)

  All of these.

  (B),(C) & (D)

  (A), (C) & (E)

  Half-n-half Clue
 

3.

Consider the following code:
class ClassA

  Error. ClassA does not define a no-argument constructor

  Error. There is no code in the class ClassB

  Will compile and run successfully

  Error. ClassB does not define a no-argument constructor

  Error. There is no code in the constructor ClassA(int x)

  Half-n-half Clue
 

4.

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

  (B) & (C)

  (A) & (C)

  (D)

  (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?

  private

  public

  private OR protected

  protected

  Half-n-half Clue
 

6.

Which of the following statements are true?
(A) An abstract class may not have any final methods.
(B) A final class may not have any abstract methods.
(C) An inner class may be declared with any accessibility keyword.
(D) Transient variables must be static
.

  (D)

  (A) & (C)

  (B) & (C)

  (A)

  Half-n-half Clue
 

7.

A package is a collection of

  classes and interfaces

  interfaces

  editing tools

  classes

  Half-n-half Clue
 


 
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