Google

Surprisingly easy. The interviewers had me do FizzBuzz, Fibonacci, and Quicksort. I had prepped for months, but the interview whiteboard process was as simple as could be. The interviewers were very friendly.

All good, a bit boring. However, in the end, they offered me a farewell snack, since I did not accept their offer of employment because I am too nerdy.

I found it challenging. However, it is not a problem if you have brushed up on basic data structure problems and recursion. Exact syntax is not required; just a basic understanding of what each function will be doing is sufficient.