Test Preparation on JAVA-Test Prep. Classes and Methods-2

1.

Which of the following modifier means a particular variable cannot be accessed within the package?

1private
2public
3protected
4default

Explanation: Private variables are accessible only within the class.

2.

How can a protected modifier be accessed?

1accessible only within the class
2accessible only within package
3accessible within package and outside the package but through inheritance only
4accessible by all

3.

What happens if constructor of class A is made private?

1Any class can instantiate objects of class A
2Objects of class A can be instantiated only within the class where it is declared
3Inherited class can instantiate objects of class A
4classes within the same package as class A can instantiate objects of class A

4.

All the variables of interface should be?

1default and final
2default and static
3public, static and final
4protect, static and final

Explanation: Variables of an interface are public, static and final by default because the interfaces cannot be instantiated, final ensures the value assigned cannot be changed with the implementing class and public for it to be accessible by all the implementing classes.

5.

What is true of final class?

1Final class cause compilation failure
2Final class cannot be instantiated
3Final class cause runtime failure
4Final class cannot be inherited

Explanation: Final class cannot be inherited. This helps when we do not want classes to provide extension to these classes.


Right Ans	Wrong Ans	Not Attempted

Which of the following modifier means a particular variable cannot be accessed within the package?

How can a protected modifier be accessed?

What happens if constructor of class A is made private?

All the variables of interface should be?

What is true of final class?

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