Google

First, an online assessment, then the HR call, then several rounds of technical interview (you need to solve data structure/algorithm problems), and finally a manager interview (mostly behavioral questions).

I had two online interviews with their software engineer. They first asked me about my research at school, and then we started the coding question part. The difficulty of the problems is around medium to hard on LeetCode.

I was invited to have an interview with two engineers for the Google Watch team. I had two rounds in one day, 30 minutes apart. Each round took 60 minutes to complete. They didn't tell me the result for two months, and no feedback was provided.