I applied through the Microsoft career site for software development internships.

I had a campus interview that lasted only 30 minutes. It included resume questions, one easy/standard coding question (written on scratch paper), and me asking them questions.

Two weeks later, I was told I did not pass the first round. However, they were willing to fly me back if I was willing to interview for the SDET position.

During the onsite round, I interviewed with four people. They still asked me to write some code, plus a follow-up question: "How are you going to test it?"

The problems that I remember:

1. Write a lock.
2. How do you test a generator for random numbers?
3. Write a data structure that can take input integers and keep track of the k largest of the numbers typed in so far.