First there's a test that checks your knowledge of the company, math skills and general business knowledge. Many people fail this test. Next there are 3 interviews - in my case with an Associate, Manager and Partner. One interview was a riddle and a back-of-the-envelope question. The other two were case studies, the hardest one was from the Associate. The interview process was fast and interviews were pleasant. Unfortunately they don't employ BAs. I had to complete and internship and another round of interviews at the end of the internship. In this case there were 2 case interviews with behavioral questions.