Q:
      
      
         
            
public abstract interface Frobnicate { public void twiddle(String s); } 
Which is a correct class?
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: B) public abstract class Frob implements Frobnicate { }         
         
Explanation: B is correct, an abstract class need not implement any or all of an interface’s methods
       
      
      
      
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