i interviewed at ucsf 2 yrs ago. It was a closed interview meaning they didn't know ANYTHING about you. My interviewer didn't even know my name. When I went in, he asked me for my name and even asked me to spell it so he could write it down on his scratch paper.
Basically he asked me everything the supplemental app asked eg, tell me about any research you did, tell me about the extracurricular activities you did and if you held any officer position, tell me why you chose ucsf, why you want to be a dentist, any work experiences etc.
Oh, then they ask about your grades and stuff bc they don't know anything about that either. I think they even asked what my DAT scores were. 😛
Just read over your supp app before your interview.