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Which of the following method does the MouseMotionListener interface contains?

Posted By :Nikhil Kumar     Posted Date :August 30, 2010    Points :10   Category :.NET Framework 
1, mouseDragged(MouseEvent)
2, mouseExited(MouseEvent)
3, mouseEntered(MouseEvent)
4, mouseClicked(MouseEvent)

Answer : 1

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Suppose you have created a WCF service. You have an interface stating your methods that must be exposed to the clients. But you have forgotten to specify "[OperationContract]" attribute in any of your method. What will happen ?

If you do not specify "[OperationContract] " in any of the methods in your interface then you will get the following error :-
IService1' has zero operations; a contract must have at least one operation

Here, Iservice is the name of my Interface. you can have your own name.
So, it is mandatory to label "[OperationContract] " attribute to at least one method while declaring your interface methods or ServiceContract.

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