Microsoft Senior Software Engineer interview questions

Applied for position. After 3 weeks a team member reached out and did phone screening. Heard back from recruiter next morning that 4 interviews will be scheduled. All rounds technical/coding/system design. 2 with potential team leads, 1 with hiring manager, 1 with test manager. Results after 3 weeks.

No problems with technical interview, I'd rate is an average. All Interviewers were smart engineers asking me about problems very close to their real cases. HR work is a bit unorganized, from the beginning the most important thing for them was my current salary or my salary expectation, very long process of negotiations.