Microsoft Senior Software Engineer interview questions

The process was fairly disorganised. I applied in January, but only heard back late February. I found a job in the meantime, but accepted the HR call out of curiosity. The (external) rep didn't have that much info on that position and we decided on me asking for a follow-up after I settle into my new position a bit more. That decision was ignored as, about 2 weeks later, I got an e-mail asking to schedule for the 3 technical-ish interviews. I was still curious what the position entailed, so we scheduled the interviews on 3 consecutive days. The first one went alright, I messed up the second one. The interviewers were pleasant and professional. However, the 3rd interviewer didn't show up. I gave up after waiting for about 20 minutes and sent an inquiry to the HR rep. I got an automated e-mail the next day that I had been rejected, but there was no feedback or anything. This level of disregard definitely left a sour taste in my mouth.

A fullstack job focus on frontend architecture. Problems are rigid and basic. Many questions are about princeple of how React or Vue worked with virtual DOM or data flow. Algorithm Question is more like data structure promblem.