Microsoft Software Development Engineer interview questions

I posted the questions below. This post is focused on the final onsite interview not the hr or first round interview. I really didn't like the process. I was interviewing for sde but got mostly design questions nothing on data structures and algorithms. If you are good at designing software architectures(the UML+implementation) then you would have aced it. Only 3 interviews for me. Some advice the process is so random, you can get easy interview questions or hard ones. So I think getting hired is mostly based on luck and the focus of the questions they ask you and how experienced the interviewer is. 2 of my interviewers were at microsoft for a long time so they were really cooperative, one guy was pretty new there and wasn't very responsive when I told him my solution. Like I said I applied for sde but all the questions were mostly on design nothing about algorithms. no testing, no time complexity analysis.

4 consecutive interviews, each about 45 minutes each. Very organized and clean process. Had one lunch interview which gave me to answer non-technical questions