Object Oriented Programming (OOPs)

Question : 61 of 72

Marks: +1, -0

Given:

public abstract interface Frobnicate {
  public void twiddle(String s); 
}

Which is a correct class? (Choose all that apply.)

public abstract class Frob implements Frobnicate { public abstract void twiddle(String s) { } }
public abstract class Frob implements Frobnicate { }
public class Frob extends Frobnicate { public void twiddle(Integer i) { } }
public class Frob implements Frobnicate { public void twiddle(Integer i) { } }
public class Frob implements Frobnicate { public void twiddle(String i) { } public void twiddle(Integer s) { } }

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