Admission Interview
Interviews simply by Institutes abroad is quite rare and is usually restricted to some business universities. You most probably won't have to go by means of one. But, just to tell you, Wharton visits Delhi, Bombay and several other cities annually to interview people. Some schools perform interviews telephonically and several others through their alumni that are based in town you live in.
If that you are applying to a great institute that desires to interview, you must be prepared.
Preparing for the particular Interview - hold the right attitude and do your research.
Consider the meeting as your final possibility to market yourself. Establish your objectives for your interview. Think of ways of reinforcing the strengths and handling your weaknesses. Anticipate to support your claims inside the application essays. Good preparation may also help you relax somewhat through the interview.