In the following code , how many methods needs to be implemented in Class B ?<br /> <br /> public interface A{<br />    public void method1();<br />    public void method2();<br />    public void method3();<br /> } <br /> <br /> abstract class B implements A{<br /> }

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 Q1. In the following code , how many methods needs to be implemented in Class B ?

public interface A{
   public void method1();
   public void method2();
   public void method3();

abstract class B implements A{
Core Java
Ans. As Class B has been declared abstract , we can either implement any of these methods and just declare rest of them abstract.

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