Microsoft Software Engineer interview questions

Overall process took around 2 months, i asked for around 2 weeks for preparation, they were kind enough to setup a meeting to know the process. It was a 3/4 round interview process, for me no one showed up for OOPs round. I sat for 45 mins, tried to email but never got a response, after that i had a system design round, Later on when i emailed the recruiter that one of the rounds didn't take place, they said they will reschedule the meeting, next week got a rejection. wasn't expecting from Microsoft as i really liked the company.