Meta Software Engineer interview questions

I had a very negative experience. It was due to one of the interviewers I ran into during the onsite interview. This interviewer was very aggressive and angry. They yelled at me for not knowing the answer to one of their questions. I don't care if I don't know how to code 1+1, you should treat everyone with respect. I reported this to the recruiting team. I have no confirmation that they reprimanded this engineer. They said they would look into it that's it. I'm fairly certain based off my previous experiences in this industry that this engineer's rage was due to racism. At the end of the interview process I was told I was rejected and given no feedback.

Recruiter reached out. Quick initial chat. Scheduled a tech screen interview. Coding over coderpad.io. Interviewer showed up half awake, kept rubbing his eyes, wasn't very involved in the process. I barely finished the first part of the question and we ran out of time. Interviewer cut me off and went off to some meeting. I gave the whole process a positive rating still, because Meta's process is actually very impressive. The engineering manager who interviewed me wasn't very good, but that's not Meta's fault imo. I've 15 years of experience with stellar referrals so getting denied because it takes me 40 minutes to manipulate a Linked List is disappointing still. The modern interview process is pretty bad.