#define mul(a, b) a*b int main(){ ans = mul(9, 5); return 0; } Questions on optimization, How Compiler works - All based on C language alone Interview Process was fine and organized well. But after the interview I was made to wait for more than a hour and half - I did not take off for the day from work, this unnecessary wait caused frustration. When they finally let me go, while exiting the building, the security personnel stopped me and said I can only exit with a Cisco Employee as an escort as per Cisco rules, but was not provided with one nor was told anything about this when I was asked to leave - so had to apologize to him and said this won't happen again, for something that was not my fault.