HR contacted me by phone a few weeks after I applied.

I had two phone interviews with managers and four onsite rounds with engineers.

I was interviewed in RTP, but later offered a position in Sunnyvale.

2 questions straight out of Cracking the Coding Interview (2-dimensional array and stack).

Design a hash map.

Difference between mutex and semaphore.

Explain memory management and scheduling using a small program as an example (in-depth OS fundamentals).

Threads, processes, stacks, heaps - what is the relationship among them.

1 hour of questions only on pointers (e.g., structure pointers, function pointers, incrementing and decrementing pointers).

Using dynamic memory allocation, flatten a 2-dimensional array into a single-dimensional array. Row-wise and column-wise (again, pointer increment and decrement).

Questions on checkpointing and disaster recovery.

Difference between a spinlock and a mutex.

Serialize a binary tree.