How Prevent methods in an interface ?

Hello Sanal Rajan,

 

The direct answer to your question is "Not Possible".  When you are inheriting an interface, you should write the definition to all the methods. 

 

But to satisfy your requirement you can make use of abstract class in between to make required columns only to be derivable. 

You cannot.

 

When you implement an interface, you will need to implement it fully. If you cannot, define two different interfaces.

 

Once the concept of interface is clear to you, such question will not even arise in your mind.