Google Sr Software Engineer interview questions

Applied via their website and got an email from the recruiter. The recruiter spoke in detail about the whole process. Fixed the first-round interview after 3 weeks. The recruiter also forwarded a lot of information about the interview process. The question in the code pairing interview was not a very difficult one, but I made some silly mistakes and took a long time to come with a solution. The interviewer was not a very friendly person and kept very quiet for most part of it and didn't really help or nudge even after seeing me struggling! As expected recruiter called and said about the rejection but he gave lots of tips on preparing for the next time. He said most people join google after multiple attempts and asked me to keep preparing and apply next year(which was nice to hear).