Boston Consulting Group Summer Associate interview questions

I applied online in October and in January got an email requesting me to record a 60 second video answer to a prompt within 3 days. A month or so later, I got an invitation to the Istanbul office for an online test and first round interview. The test was fairly easy, consisting of a business case with 25 multiple choice questions mostly involving basic calculations and data analysis. I had two first round interviews with a consultant and a principal, both of which were about 10 minutes of fit questions, 40 minutes of cases and 10 minutes of my questions to the interviewers. The cases weren't all that difficult -just basic profitability and market sizing- but they were more interviewee-led than I had anticipated. Of course, the interviewers still push you in the right direction if you stray off course or get stuck. Within 3 days, I got an invite to a final round interview with one of the partners of the office. The final round was a bit more tense, as the fit questions were a bit more scrutinizing and the case was far less structured. The fact that I didn't get much sleep the night before and overdosed on coffee that morning wasn't doing me any favors either. Half way through, the interviewer ended the case and asked if I had any questions for him, leading me to believe that I had failed spectacularly. To my surprise, I received an offer the next week.