NVIDIA interview questions

Applied for job when in school HR contacted me. Arranged for a phone interview with the hiring manager. He was very polite and asked me to mail him a Cycle in Linked List solution. On site was long and rigorous. About 4 engineers + 1 manager + 1 VP + 1 HR. Most questions were around concurrent systems / race conditions / deadlocks / livelocks / semaphores / Operating systems internals. The newer members asked about bit twiddling hacks (please go through Stanford bit twiddling hacks once you wont regret it :-))