Hey ALI, don't sweat it. Like Juan7677 said, it's one of the more laid back interviews you'll encounter. I interviewed on 10/10. You get one faculty and one student. The faculty interview is open file, but the student interviewer only has your personal statement. My interview lasted only about 20 mins and I would say the entire interview was strictly conversational. No difficult questions at all, but your perception of difficult may be different than mine. The student interview is even more laid back. The students will tell you themselves that they have no say in the selection process, so it's really your time to ask them questions. My interviewer took me on a stroll around the block to check out the neighborhood. Pretty nice. UOP is my top choice too so maybe I'll see you in July (crossing fingers). Good luck!