All of the questions that I was asked were standard: Why IU, why medicine, and specifics about my application. I was not asked any ethical or hypothetical questions, although students who interviewed the same day but with different committee members said they were asked some ethical questions (pregnant teenager who wants an abortion, an ER doctor is drunk, etc.).
Read this website, looked over the school's website (take a look at IU's "Nine Competencies" portion of their curriculum).
What impressed you positively?
Very nice facilities/buildings/campus grounds. I like the fact that the school offers a monorail between different hospitals--makes it easier if you are doing your residency in Indianapolis. Faculty and students were very nice and helpful. Interviewers tried hard to make me feel comfortable and welcome. The pediatric hospital at IU is supposed to be #1 in the nation.
What impressed you negatively?
IU will admit 280 students this year. Although the faculty and staff seemed very friendly and interested, it may be difficult to distinguish yourself from 280 other students. Additionally, not all students will attend IU at the Indianapolis campus for the first year (this may not appeal to some students). I was told by other students to absolutely avoid the Gary, Indiana campus (lots of violence, gunshots, etc.). I was especially turned off by the exorbitant cost of tuition for non-residents (average cost of attending IU for 4 years, including tuition/books/supplies and cost of living, as a non-resident: $273,000). Ouch.
What did you wish you had known ahead of time?
The campus is not that bad, considering it is in the downtown area. Rather pretty actually. And the housing is affordable.
What are your general comments?
You show up relatively early in the morning for interviews. There were over 50 students interviewing the day that I did. We had interviews scheduled all day long (mine were early in the morning, other students' weren't until 3 or so in the afternoon). There were several financial aid and admissions presentations scheduled throughout the day to ensure that students were able to attend at least one, no matter when their actual interviews were. A box lunch and tour was provided by some of the medical students. The students and especially the interviewers are very welcoming and kind. The interviewers appeared genuinely interested in learning more about me as a person, and they listened attentively to what I said. The day lasted from about 9 am to 3 pm for me, longer for some students with later interviews.