The interview at UPenn was informal. The day started with a brief welcome speech by admissions coordinator at 8:45 a.m. From 9-10 a.m, there was an Introduction and overview of the school. There were total of 6 applicants on the day of my interview. The interviews started from 10.00 a.m. The interview format was 1-on-1. My interview was at 10 a.m. and lasted for an hour. Just the general questions some regarding the academics and some about the extracurricular activities and how i came to know about UPenn. The interview was followed by a tour accompanied by a D-3. The buildings looked pretty old. The school is strongly research oriented. Followed by the tour we had excellent lunch with 2 D-2 students. They were pretty friendly. After the lunch, met with the admission's coordinator for about 5-min's and then i was back on my way to UNC-chapelhill. In all it was good interview. If anyone wants to know more they can pm me.