I had two simultaneous loops for two different positions at Microsoft, got selected in both and I accepted the one I thought was best suited for me. The interview process started with emailed questionnaire that included personal + problem solving type questions. Then the loops themselves contained 5 interviews each. The interviewers were from the team that needed the candidate. I was asked to comment on lot of actual scenario/daily problems and their solution. The 1:1 interview had questions mainly on algorithms and testing scenarios. Overall it was a typical Microsoft interview. The key to crack it is being confident answering and being strong in the fundamentals (datastructures, algorithms)