A recruiter approached me, interested in scheduling an interview for me with Cisco. They wanted to move fast, so they called me in for the interview within the same week. The hiring manager asked very briefly about my past experiences and then jumped right into the technical questions. All communication was done through the recruiter.

What is the difference between a function and a macro?

A question that used pointers and bit shifting in C to print out the characters from a string.

Find three bugs in this block of code. (The answers were so basic that I overlooked the obvious: no handling for division by zero, no default variable initialization, and an error in the logic of a calculation.)

Add a string element into an already existing doubly linked list and handle corner case scenarios as well.