The onsite interview was set up a week after the telephone interview. It took three weeks for them to get back after mailing the HR and hiring manager. The work involved for the position was very good. The team was friendly, and there was not much HR interaction. Coding questions were only in C, ranging from pointers to bitwise operations to data structures.

Implement a doubly linked list.

Find the number of bits set in a random number.

Find the position of a set bit in a number.

Difference between a Binary Semaphore and a Mutex.

Explain how RIP & OSPF differ, and which is better.

Explain NAT & NATP.