Microsoft Software Development Engineer In Test (SDET) interview questions

Started with phone screen which was quite easy. Then after two months invited for onsite it Redmond WA. I was more interested for SDE position but they invited me for SDET. Went through 4 interview loops.

I Applied through a representative in my school who had the contact information of the recruiter. I was then offered a phone interview, which I accepted. During the interview, I was asked one technical question, on operating systems. The difference between a process and a thread. Was asked to design a keyboard and was also asked to Figure out the temperature outside the room from the inside without using any technology.