The UOP interview is very relaxed. You are interviewed by three people, 2 current pharmacy students and 1 faculty member. The students are very friendly and are not going to "grill" you, it is very much like a casual conversation. They will ask you things like where you're from, why you want to go into pharmacy, what you can contribute to the school, etc. The professor will be a much more standard interview. The questions that are almost ALWAYS asked are 1) How do you see pharmacy changing in ten years? 2) What do you believe you can contribute to the profession? 3) What qualities make you ideally suited for pharmacy?
Believe me, every school asked those 3 questions.
Anyways, there is also an essay to complete. You have 2 hours, I believe, to finish it, and the format the past few years has been the same. You are given an ethnical scenario and you must chose what you would do in that situation and justify it. Last year's scenario was that a young girl came in for a prescription for birth control pills. Her father is a friend of yours and asks why his daughter was in the pharmacy and what her prescription was for (I believe the prompt made you assume he was already suspicious). You have to decide whether you tell him the truth or invoke patient privacy. The question is open ended and there is no "right" or "wrong" answer, but things to concentrate on are to make NO spelling errors at all and to make sure your grammar and organization are in order.
I was an undergrad at UOP and I also interviewed there last year so I'm very familiar with the process. I also interviewed at all of the other cali pharm schools except Western (didnt apply), so if you guys have any question about the other schools just holler.
Oh, and UCSD and UCSF coordinate interview dates together so that they will never conflict with one another. USC interviews are typically at the beginning of a month, while UCSF interviews near the beginning of February, so there shouldn't be too much of a conflict.