I am going through one of the mock test and got the question about [ some class name ] , I tried searching google and java documentation but not able to find this interface , Can some one let me know if this type of interface exist and if it is where can i found more details.
No, this interface does not exist. But what you have there is NOT a mock exam - the material contains copies of actual exam questions. Distributions of those is prohibited, and here at JavaRanch we take a firm line against this kind of behavior. You're best advised to delete that material if you want your exam to be worth the paper it's written on. We certainly won't allow discussions about it here.