I went to the career/graduate advisor at my university to prepare for my interview, and she was lovely and all, had a list of questions such as, what do you want to do in ten years, why this program, hobbies, etc. And, guess what? My interviewer asked none of them!
My advise, is don't go by any list. Know EXACTLY what is on your resume/essay so when they ask a specific question, dont pause. My interviewer asked what a specific phrase meant in my essay, and to explain how that related to my current employment. Obviously, I knew what she was talking about, but it took me a second to flip through my essay to find that paragraph, to know exactly what she was reading, and not repeat what she already knew. Thankfully, I got in, but my brief stutter, of "uh.... um..." until i found it, made me doubt how well I did in the interview.