There was an online round with a fairly straightforward coding problem.

After that, I was invited on-site for a four or five-round interview.

Each time, I solved a problem on a whiteboard with a different Google engineer.

The emphasis was on speed, which was not ideal for me because I arrived very late the night before and was not in my sharpest state.

I did not receive an offer, and the feedback was simply that I was "too slow" for their liking.

Throughout all interview rounds, the question was: "How would you solve this problem?"

If a sub-optimal solution was presented, the follow-up question would be: "How to improve it?"