Microsoft Software Development Engineer interview questions

The recruiter sent me an invitation for an on-campus technical interview. I was asked to schedule the onsite the next day. I asked for three weeks to prepare. The onsite process is pretty standard as many other companies. I had four interviews all of them with senior developers/managers in the respective teams. I was asked questions related to DP and Backtracking. CTCI along with decent practice from Leetcode is enough to crack the interview. We need to be careful testing the code we write.

On campus interview. The interviewer asked some basic list reversal questions, didn't even look up at the board for my answers. Spent the whole interview checking email. Felt like he thought he had better things to do.