As described in several online resources. Google's website and the recruiters will provide detailed topics to prepare for before the interview. Expect 3-4 people for a technical interview and one HR interview.

Process went as follows: 1. HR fist talk: it went just fine 2. HR second talk: align the expectation of the next interviews 3. Technical interviews: overall they went well, one of the problems was a crazy one (babylon game) 4. Behavioral interview: I believe it went well 5. System design: the interviewer seemed to put traps on the way for me to fall on them i.o. trying to come with a solution together.