The interview is a panel; usually two faculty with at least one of them being a DO or an MD. It lasts for approximately 10-15 minutes.
As far as attendance, my class was really disappointed with the mandatory attendance decision and we voiced our concerns. The school ended up taking it back but only for my class. With the M1s, the professors were given the option of having mandatory attendance for the classes they teach. Of course, most faculty want students to show up to class, so those professors reinstated the 70% mandatory attendance policy for those subjects. I think biochem and histology are the ones that aren't mandatory. There might be more. I have no idea if this is supposed to carry on to next year's class. You can ask admin at the interview if it does, but considering that the current M1s were told that attendance was not mandatory at their interview and now it kind of is, who knows what will happen by the time you guys matriculate lol