Question

which one of the following is not a legal declaration for top level classess or interfaces?

a. public abstract interface Test{}
b. final abstract class Test{}
c. abstract interface Test{}
d. public abstract class Test{}​

Answer 1

Answer:

The correct answer is abstract interface Test{}.

Explanation:

This concept is mainly used in programming language of Java.

In java, a JUnit is used for purpose of writing the test cases; such as abstract classes is helpful for normal classes and methods. It supports a various kinds of inheritance.

The legal declaration of top classes or interfaces is:

1. Public abstract interface Test{}

2. Final abstract class Test {}

3. Public abstract class Test{}

The abstract interface test{} is not the legal declaration of top classes or interface due to it not being a static and not protected.

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Answer 2

Answer:

c. abstract interface Test{}.

Explanation:

The abstract interface test{} is not the legal declaration of top classes or interface due to it not being a static and not protected.

The legal declaration of top classes or interfaces is:

1. Public abstract interface Test{}

2. Final abstract class Test {}

3. Public abstract class Test{}

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