Well the main interview was of 4 hrs. i was interviewed by four different project managers. Each one interviewed me about some basic stuff and then stuff relevant to their teams. It was mostly technical and there was always two senior people interviewing me. The questions were IQ based some technical ones, at times checking problem solving skills. Some problems had to be solved on the paper. It was pretty tough but at the same time you would get to know about your potentials so if you look at it positively then it was very challenging and interesting at the same time.