I applied through university. The process took 2 weeks. I interviewed at Google (Mountain View, CA) in Oct 2015
Interview
4 interviews, lunch in between. 4 people from a team in the building drilled on questions semi-relevant to what they were working on. there was a theme of graphs / geometry. interviewers were very nice and accommodating, and the 4 don't communicate with each other. they submit a review separately along with the HR + other info so, pretty robust.
I applied through a recruiter. I interviewed at Google (London, England)
Interview
had a recruiter call where he explained how would the process work and i booked the meeting and had the interview we introduced ourselves and got asked the questions where one focused on the prefix sum which i have solved and had a follow up which i failed in solving
Recruiter Call -> Behavorial Interview/Technical Screen (virtual) -> Onsite (in person)
There may be options to interchange the Coding based technical Screen with a Specialty Round depending on the role. If you pass this round, you are given the opportunity to appear for the onsite.
Resume review, assessment, recruiter chat, technical interviews, final round the questions were interesting and lots of fun and the people were nice too. Good luck. I don't know what else to put here