The interview starts with an hour research talk and is followed by a round-table Q&A. Then you will meet with individual researchers and will touch on a variety of topics. Some will want to further discuss your research with you and ask pointed questions. Other one on ones will focus on the interviewers research and your thoughts about, e.g. how you would tackle that problem, how you would extend it, where you see collaboration, discussion a specific problem they are currently facing. All in all 3 fun days, which include going out to dinner and asking questions in return.

I gave a scientific talk on my research, had a roundtable discussion, went to lunch, and had 6+ one-on-one interviews. Overall a pretty laid back process. Challenging, but intellectually stimulating questions.