If you are applying through a job portal or as an external candidate, Microsoft may send an online coding assessment.
Problems focus on data structures, algorithms, and system design.
Typically 2-3 coding problems (LeetCode Medium to Hard level).
Had total 3 rounds of interview
All focussed in system design.
All were of medium to high difficulty.
First round on current project.
Second round on designing search to report nearest petrol bunks.
I applied through a recruiter. The process took 5 weeks. I interviewed at Microsoft (London, England)
Interview
Four round interview process, passed the initial screening but couldn't make it through third round. Simple behavioural questions and a live coding exercise which was quite difficult. DSA questions asked.