If you get a behavioral interview like I did, they will ask you questions they know you are not prepared to answer. They want to see you think on your toes.
Some of the questions I got were:
1. If you could go to any country, what would it be and why?
2. What is the biggest obstacle you will face by coming to our school?
3. What is something you have done you regret?
Anyway you get the idea, so just be yourself and you will be fine.
I had one kinda weird interview where I was presented with a scenario and then asked 2-3 questions about the scenario.
There were maybe 7 total scenarios each with a different interviewer. One scenario was word for word the Heinz dilemma (I answered that we needed to look for patient assistance ). For the most part, the scenarios were trying to get at the same information as a straight forward interview.