Google Senior Software Developer Engineer interview questions

I first had two technical interviews by phone that went quite well. Then I did an onsite (I live 10 miles away from their campus) that consisted of 6 sessions of interviews. Despite the claim that Google no longer uses puzzles in interviews, I found that 2 out of 6 interviews consisted of solving tedious puzzles. I would say that 4 of the 6 sets of interviewers were friendly, one fellow was outright cold, one was slightly negative. Interviewer 1 (solo): Friendly and enthusiastic. Interviewer 2 (solo): Friendly but not enthusiastic. Seemed to want to hire a different type of person more like himself. Interviewer 3 (solo): Rather cold. He did tell me he knew that I'd interviewed at Youtube earlier, which felt creepy especially because the more memorable interviewers at Youtube were creepy. Imagine being reminded of a BAD experience. Right after which, he presented a tedious puzzle! When I was solving his puzzle, I felt I was constantly interrupted and hounded. I wanted to ask him to please be quiet, but I judged from his attitude that could have ended the interview prematurely. In the Q&A part, it was revealed he had never heard of Google's Project Ara. Maybe he was having a bad day... at my expense. Interviewer 4 (lunchtime casual talk, solo): Friendly and enthusiastic. It was a relief to talk with him after the previous guy. A big relief... Interviewer 5 (solo): Moderately friendly, presented a puzzle. I solved it. I got a feeling he seemed to want to hire a different type of person more like himself. Interviewer 6 (solo): Someone quite like myself. Only person to ask intelligent/wise questions and took notes. To Google's credit, there were no team interviews (that I recall). Long after the interview, I got emails from Google asking me to help them improve their interview process. That's why I came to Glassdoor....