My Facebook phone screen many years ago consisted of an HR-sounding woman asking me three questions, the first two I answered correct (according to her), and th

My Facebook phone screen many years ago consisted of an HR-sounding woman asking me three questions, the first two I answered correct (according to her), and the third one I answered correctly (I checked afterwards) but didn't use the term that was apparently written down in front of them, was told 'wrong, it's <term>', was thanked, hung up, and got a rejection email a few days later. In that case I think it's pretty clear I was rejected based on getting one answer incorrect. The phone call wasn't even that long at all. And while other interviews have been longer, I suspect I've been rejected a few times based on me struggling with one particular Leetcode problem. One guy didn't even let me finish it beyond five minutes of trying to figure out the recursive function, just rejected me on the call. That guy had a huge ego and I already wasn't certain I even wanted to work for him anyway (but I didn't have any other offers yet so I gave it a shot anyway), so not a huge loss there.