Epic Software Developer interview questions

I applied online through their careers portal. I was contacted by their recruiter the next day itself and was scheduled an interview with one of their software developers. In the mean time they also asked me to give their candidate evaluation test. The first interview was just fine with a mix of HR and technical questions. Except the programming questions the technical test was very easy. You can go through the list of questions on career cup and just do fine in the test. I got a call from the recruiter that I have been selected for the on-site interviews. The pay for the accommodation, cab fares, flights and dinners with their employees. There were just two on-site technical interviews. One was a case study on some technical problem that they might have faced or are facing. The second interview was discussion of any one project done in school. My first interview went very well as the interviewer was very friendly and we were kind of finding the solution together. The second interviewer was rude. He picked up his cellphone once during the interview. Also, while discussing the project he was mocking me for my solution instead of asking questions. Then at the end there was a discussion with my interviewer regarding salary that I would want and relocation etc. It was a good interview process except that the second on-site interview went bad for me. I have heard that they pay really well.