Microsoft Program Manager interview questions

Setup through University Recruiting. One on campus interview. Interviewer asked me what I am passionate about and asked me to design an app for it on paper. Next Onsite. It will be 8 hours long and 5 rounds. Two junior level PMs, one engineer, and two exec level PMs. Asked me to design systems on whiteboards and pointed out edge cases, which I had to address in the design. Last interview with the top exec and was very pleasant conversation about why I wanted to be a PM then design a product problem.