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Discussion :: Declarations and Access Control

  1. Which two of the following are legal declarations for nonnested classes and interfaces?

    1. final abstract class Test {}
    2. public static interface Test {}
    3. final public class Test {}
    4. protected abstract class Test {}
    5. protected interface Test {}
    6. abstract public class Test {}

  2. A.
    1 and 4
    B.
    2 and 5
    C.
    3 and 6
    D.
    4 and 6

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    Answer : Option C

    Explanation :

    (3), (6). Both are legal class declarations.

    (1) is wrong because a class cannot be abstract and final—there would be no way to use such a class. (2) is wrong because interfaces and classes cannot be marked as static. (4) and (5) are wrong because classes and interfaces cannot be marked as protected.


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