I had a phone call with two members (one engineer and the manager) where I was asked straightforward questions about computer architecture (cache), keywords in C (static), and multithreading (definitions of mutex, thread, spinlock, etc.). They also asked me about my work and academic experiences during the interview.

I then had an onsite interview, which was 4-5 hours long. I had an hour-long session with one interviewer, followed by another hour-long interview with a different person, and so on. During each one-hour session, I was asked to write code on the whiteboard. The interviewers expected competence with OS concepts and the C programming language.

On-site interview questions covered bit manipulation, string reversal, and LRU cache.

The manager also asked about my work experience and simple OS questions, such as difficulties with multithreading and deadlocks.