Boston Consulting Group Associate interview questions

I had an initial phone interview, was then invited to a face-to-face interview in the office. The 1st interview went pretty good. The interviewer was friendly and I was able to solve the case with little help. The 2nd interview was scheduled the following week. I had a terrible experience with this one. First, the interviewer was late for 10 min (not sure if he did it on purpose). Then when he finally arrived, he just gave me a stack of paper, asked me to solve the case, and said he would be back in 25 min to see what I have to say. So for the next half an hour, I was just sitting there, working on my paper test. The worst thing was that the whole thing was in Japanese, and I didn't get to ask any clarifying questions!!! When the interviewer came back to the room, he asked me to present my findings in Japanese (totally didn't expect that since the first two interviews were in English). After the case, we had a short talk and he asked me all the typical interview questions.