Applied through an agency, it was a 12 month contract role with Google. Was told after 2 days that they want to arrange a face to face interview. 2 onsite interview with lead recruiters. Followed by a telephone interview with another recruiter the next day. They gave me a decision the next day. As this was a contract role they moved very quickly. Asked questions about my experience, sourcing techniques etc. Also few scenario based questions and how will I react in certain situations.

Had an on site interview through employee referral. Had two 30 min back to back interviews. Both interviewers asked pretty standard questions. Mostly about my recruiting experience. The steps I have taken to improve the process at my current position. Questions such as, what skills are needed for some of the positions I fill at my current role. What do you think a CS Degree consists of? No brain teasers.