Google Developer interview questions

Interned at Google the summer before. Loved the place. The team seemed to like me. Am graduating. Well, let's do interviews! I contacted my intern recruiter asking for a full-time job opportunity, and s/he quickly referred me to the recruiter responsible for that. Since I was a former intern my phone screen was waived (had two 45-minute screens when applying for internship), and my former intern host was asked to provide a feedback. I was asked to do a job talk (as a PhD) followed by 4 rounds of interviews, 2 research and 2 engineering. The job talk was 45-minutes followed by 15 minute questions. I was basically talking about what I did during the graduate school years, so it was quite pleasant and I was excited to see people interested in my work. After that it was a casual lunch with my intern host, so I devoted every minute enjoying the food. The two research interviews were conducted by people familiar with the field, and had challenging questions on the overall understanding. I found it very exciting as both of us would get involved into discussion about the state-of-the-art. A little coding and math details were asked, but mainly about research ideas. The two coding interviews were very standard - I did not get those very difficult questions like "implement sudoku in 30 mins" that someone allegedly encountered. The interviewer was constantly copying my whiteboard writings down, which created a little down time. I asked the interviewer and s/he said it was recently required and no worries. I guess if this could be disclosed by the recruiter earlier it would be better. After the interviews the recruiter followed up promptly, with accurate estimates of when I would get updates. The hiring committee approved the application in a week, followed by the final offer a few days later. Overall it is a nice experience and Google apparently provides great opportunities.