First round on-campus interview consisted of 2 cases with 2 different Cornerstone Senior Analysts. First, there was a small fit-portion, where I was questioned about Cornerstone, the position, and what I can bring to the company. The cases were both quite quantitative and required some calculations, nothing too complex. The interviewers were very nice and helpful during the process, guiding me (where necessary). I definitely enjoyed the interview since these were actual cases that the analysts had worked on, so they were able to share with me the actual outcomes. Overall, the cases are representative of what Cornerstone analysts do daily. There are 3 rounds (all cases)l and I am waiting to hear from them.