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  1. public interface Foo  {      int k = 4; /* Line 3 */ }
    Which three piece of codes are equivalent to line 3?
    1. final int k = 4;
    2. public int k = 4;
    3. static int k = 4;
    4. abstract int k = 4;
    5. volatile int k = 4;
    6. protected int k = 4;

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

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    Answer : Option A

    Explanation :

    (1), (2) and (3) are correct. Interfaces can have constants, which are always implicitly public, static, and final. Interface constant declarations of public, static, and final are optional in any combination.

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