You’ll get some down to earth interviewers and some really arrogant ones. A pm interviewer a long time ago asked me to design a feature. I said I wished cars could do X for safety and UX reasons. I got told that was a super dumb idea and unsafe. But now, this is a feature that is commonly used in luxury cars.
Answer all questions correctly.
Be Googlely. No I don't actually know what that means.
Be humble. Be interested. Be yourself. And please make sure that you ask the questions to also validate if Google is a good fit for you too.
Don’t lie.