Discussion :: Testing sawaal
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public abstract interface Frobnicate { public void twiddle(String s); }
Which is a correct class?
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A.
public abstract class Frob implements Frobnicate { public abstract void twiddle(String s) { } }
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B.
public abstract class Frob implements Frobnicate { }
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C.
public class Frob extends Frobnicate { public void twiddle(Integer i) { } }
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D.
public class Frob implements Frobnicate { public void twiddle(Integer i) { } }
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Answer : Option B
Explanation :
B is correct, an abstract class need not implement any or all of an interface’s methods
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