Google

The technical interview pushes your limits on your understanding of optimization problems. I felt that my studies only scratched the surface of the critical thinking required for this position, and that was pretty much how it went.

Usually, there are two phone interviews and then a 4-hour onsite. However, I skipped one of the initial phone interviews. Also, because I did not do too well on the design interview, I had to come in again specifically for another design interview.

Very dependent on behaviorals. I think Google is shying away from technicals. Know what and why of your resume. The interview process was lengthy and required a lot of preparation. I'd suggest using some tools to prepare behaviorals as well.