Google Site Reliability Engineer interview questions

Firstly I was given a link for 2 Programming questions. Medium difficulty questions in 90 minutes. Solvable because of ample time. Then I was contacted by a recruiter and scheduled a phone call interview. 45 minute phone call and an easy programming question based on Strings on a Google Docs. Then, I was invited for an on-site interview at their office in Mountain View. 4 rounds. Whiteboard programming (1 big question or 2-3 small questions) in each round. Again questions were solvable.

Two Telephone Interviews followed by an On-Site Interview; screening process was the usual from the many stories i've heard at Google, nothing out of the ordinary, interviewers are usually journeymen techies, and are reading from a prompt. Other than that, one is expected to be fully proficient in SRE principles including distributed computing.