Microsoft Program Manager interview questions

Applied in October with a phone screen scheduled the following week. I thought the phone screen went okay, but then radio silence until December when I got an invite to fly to Microsoft. Flew out to Redmond, went through 4 back-to-back interviews for a PM Summer Internship. First interviewer was super kind, and everything went well. Second interview was much more difficult -- the interviewer didn't really give me any visual cues (such as nodding) to indicate whether my responses were in line with what he was thinking, and in general just didn't give me much guidance to go off of. Third interview was informal lunch, which was pretty good but I think having an interview over lunch is tough because you're trying to eat while also answering questions. Fourth interview was by far the best with someone who had been at Microsoft a really long time. Incredibly kind guy, and he offered me useful feedback on my responses as well as a framework for how to answer the case study questions. Everything was behavioral for the most part.