There were two interviews. One is a behavior interview by a lady from HR. She asked a lot of behavior questions to see what your personality is. She was pretty nice and kind, so it was not that hard.
Another one is more like a technical interview, which is more challenging. They will emailed you a case the night before the interview. I think it was a float chart of a bank loan process.Based on that case, you will be asked a lot of questions, but there will be an additional information given during interview. The whole interview is about that case. So you should really know the case. I was not very well prepared.