A recruiter contacted me through LinkedIn.

This was followed by a phone screen and technical interview with a Google Engineer.

I was then invited to an on-site interview.

Finally, I was contacted by the recruiter again.

The whole process was extremely slow and took 3 months.

Implement memcpy and know how to optimize cases which don't have to be copied byte by byte.

Given a binary tree and a value, find all possible numbers of ways that sum up to the given value.

Behavioral questions...

Design a global system performance monitoring network (basically, know the differences/advantages/disadvantages associated with TCP/UDP).