Applied through the Microsoft website for various positions.

I received a first-round on-campus interview without any indication of the specific job I was applying for.

Approximately six weeks later, I was contacted and informed that I was being considered for the SDET position. I was asked to schedule a trip to the main campus in Redmond for final-round interviews.

The final round took all day and involved four different interviewers across multiple buildings on campus, culminating in a lunch interview.

All expenses for the trip were paid, including travel and lodging.

The first interview question involved 3-D vectors and normalization. It was difficult because I had forgotten these concepts. I was a math major, but I hadn't applied the knowledge in years.