I had an interview at NYU the day before yesterday. Just one interview with a professor. He had a list of questions, and asked me according to the list. In front of me, he worte down his comment on the check sheet.
'Why dentist?', 'Your strength and weakness?', 'How many schools did you apply?', and small talks. It was very conversational. However, it would be better to prepare the answers of general questions.
Good luck.