I've done two onsites with Google in the past essentially YOLOing it (I only study my interview failures because I view otherwise as an inefficient use of my time) - first time did terrible, second time almost passed if I didn't completely bomb my very last session. The second time ended up not really mattering because two different teams in two different orgs for my current non-Google FAANG wanted to hire me after onsites done on back to back days (side note: that was almost 15 hours of interviewing in two consecutive days - that's a lot of time, I only was able to do it because I was funemployed at the time).
I actually appreciate it very much if a candidate didn't study & focus more on giving the best answers to their capability when I interview them - the questions I give them are usually questions that no amount of studying would have prepared them for, so already taking the mindset of trying to respond thoughtfully & earnestly to problems & situations that change on a whim puts them a step ahead.
I studied for the interview I wanted (by being a thoughtful software engineer in my day job) and not for the interview they offered (which would require me to either be a professional leetcoder or some algo/performance expert). If they didn’t want a good software engineer then they’d have to pass on me. I made it clear in every session that I was thinking through the problem, asked good questions, and when there were aspects I could write concrete code for I did. If you score by solution competence and performance I think I aced 2 of the coding sessions and did pretty mediocre in the other 2. My interviewers must have been willing to go a bit off of the default mode of operation as I managed to get an offer.
I don’t know if interview performance has anything to do with negotiating power, but I was able to get damn near the highest possible total compensation my level allows for without a competing offer.
