public abstract interface Frobnicate { public void twiddle(String s); } Which is a correct class?

by

A) public abstract class Frob implements Frobnicate { public abstract void twiddle(String s) { } }

B) public abstract class Frob implements Frobnicate { }

C) public class Frob extends Frobnicate { public void twiddle(Integer i) { } }

D) public class Frob implements Frobnicate { public void twiddle(Integer i) { } }

View Answer
Option – B.

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