My interviewer for my post-application interview didn't write down anything during our interview. He had my file sitting on his desk, but didn't open it while I was there. He may have made notes afterwards, though.
As far as questions to ask, I did what I'm guessing pretty much everyone does, so I'm not sure if this will be very helpful...
I looked at the schools website to see if they outline specific criteria for how they select students. I typed those out and added all my information specific to those criteria. During the interview, I just went down the list to see what he thought my biggest weaknesses were, and which things I didn't need to worry about improving. I had a short list of options regarding what to do regarding graduating, taking post-bach classes, summer internships, etc and also asked for any general advice. That was about it.
Hope that helps some, good luck!
