It was mostly a fit interview as I was referred, and some technical questions about the cases I've done because I've worked as a consultant before. Then there was a hypothetical case question, nothing too hard. There were questions about if I'd be all right with living in a foreign country (I'm studying in the States and this internship was in China) and if I'd be okay speaking a foreign language (Mandarin). The interviewer was a senior consultant, who I ended up working under that summer, and she was very nice and for the case, she would help guide you along too if you start going off track. I'm not sure about the usual interview process, but mine was a phone interview because of my school's location and the location of the office that I applied for.