Interview is a little bit tough as its a well known university, but if you are well prepared then it will be easier for you.

Try to have a good knowledge about your subject and field as they usually ask logical questions about your field. their questions are a litttle bit trichy. So keep calm and try to answer them logically enough so that they find your answers attractive. 

One more thing try to be specific. Don't make your answers too long, answer them in short but keep in mind that your answers contain everything what they want. 

rest don't be nervous and answer confidently.... 

Good Luck.