I first had a non-technical phone call with a recruiter.

Next, I had a technical phone interview where I was asked to write code on Google Docs.

Finally, I had 4 or 5 on-site interviews during one day, from 9:00 to 14:00. I also had lunch with a Google employee in between two interviews.

One question I had was to code a function to compute a rolling mean.

We explored different possible designs and implementations.