Amazon Software Development Engineer interview questions

I was contacted by a recruiter based on my LinkedIn profile who set me up for a phone interview. There were 2 rounds of phone interviews after which I was invited to their Seattle office for an onsite. Recruiters and HR staff were very prompt about letting me know the results of my interviews. After the initial interview, I was notified within 24 hours of their interest in moving forward. The onsite consisted of five 1:1 interviews including lunch with the manager. The manager asked me an interview question while eating lunch which was not the most pleasant experience. It was obvious he was ambitious and driven but did not have the best social skills. Some interviewers were friendly and encouraging while others were not.