I was contacted at my university career fair. They had a small quiz to do on the spot, then reached out by email to set up an interview.

The next step was a phone interview, along with a CollabEdit session. I passed that and they set up one more interview for a week later with a different interviewer.

I was not adequately prepared, but the questions were straightforward and similar to the ones posted on Glassdoor. I didn't make it to the final interview, which would have been onsite at Nvidia.

Lots of OS-related questions.

Also coding exercises about bit manipulations in C.