Fairly painless interview process.

Submitted a resume online, then the recruiter emailed me to set up phone calls the next day.

The recruiter called me a couple of times to know more about my background, expectations, and current employment status, etc.

We went through Google's standard technical interview process.

There was one technical round where I took substantial time to understand the question and reached the solution. Although it worked and was tested eventually, I guess that was the round which led to the final rejection.

Signed NDA.

There were math/geometry problems, searching and sorting problems, linked list/array problems, and mathematical modeling problems (given a real-world scenario).