Resume drop for OCR. Interviewees were invited to a social that helped us get to know the interviewers. First round was two one-hour, 1:1 interviews. In each, about 15 mins of behavioral ("tell me about a time you positively impacted society", etc) and the rest was a case. I was called that evening for final round the following day. Final round consisted of two hour long interviews, each 1:1. First was purely a case interview. Second was purely behavioral. All interviews were with executives - senior manager and above. All in all, everyone was extremely friendly (much more so than expected) and seemed genuinely interested in me. Nothing extremely challenging - just be prepared to defend any points made on your resume and have good stories. After doing final round on Friday, I received the offer the following Wednesday, making the whole process less than a week.