Earlier this year I had an experience where I was the interviewee in the situation you describe, and it was very humbling. I had just received offers from two

Earlier this year I had an experience where I was the interviewee in the situation you describe, and it was very humbling. I had just received offers from two FAANGs, and I was flown into the Bay Area to interview at a third. One of the interviews was mostly behavioral, with 20 mins at the end for an algorithms problem that I had done before on LeetCode. I did so badly that after 20 minutes the only thing on the whiteboard was the problem statement. I still remember the interviewer taking a picture of it, and me kind of cringing because of how bad it looked. I didn't get an offer, unsurprisingly.