I understand the blank mind feeling. I was on a phone interview with Oculus 2 weeks ago and had a simple circular buffer question. I was expecting something a

I understand the blank mind feeling. I was on a phone interview with Oculus 2 weeks ago and had a simple circular buffer question. I was expecting something a lot harder, frankly, and hadn't practiced writing a circular buffer in a while. I was doing fine until I got half-way through and wanted to refactor my code. Since we're under time constraints I tried to push through and use my existing design choice but it started the anxiety train rolling. In a couple minutes my mind fogged over and I literally couldn't comprehend the code I had written a few minutes ago. The interview ended poorly and I didn't get the job. I finished the code after the interview, along with some test cases, and the whole thing worked great. It wasn't that I didn't understand the problem, I just couldn't implement it with someone breathing down my neck. I interviewed with Nvidia a week later and almost had a similar issue but in that case the interviewer sensed my reaction and managed to talk me through things. I managed to recover and now I'm scheduled for an on-site.