Microsoft Software Developer - Internship interview questions

Online assessment and recruiter screen-> 2 sixty minute Technical Interviews back to back -> Final ninety minute interview with manager. Overall took about a month with a week between each stage.

Interviewer opened up by asking questions from my resume and behavioral questions. We then moved forward to a coding round about finding if a substring exists in another string. They than followed up by asking the time complexity of the problem. The interview was concluded by asking system design questions regarding developing a messenger application.