Qualcomm

Phone interview, followed by 3 rounds of face-to-face interviews. Questions on C: (check nuances of C like alignments/pointers) Data Structures: Linked Lists questions Operating Systems: Process interactions/scheduling/race conditions/deadlocks etc.

There were four rounds of full interviews. Each interview was four to five hours long, with lunch in between. The HR round was last; there wasn't much to it, though. Overall, it was a good experience. The people were very knowledgeable.

Face-to-face interview: 4 rounds, followed by 2 HR rounds.