NVIDIA interview questions

It was the first round of interviews which went on for less than 45 minutes and was one of the worst experiences I have ever had. The interviewer was least interested in interviewing me and did not turn on his video either. I felt really bad after the interview was completed, as he did not even greet me at the beginning of the interview and was laughing very loudly when I answered a couple of questions wrong. I do not want to assume anything, but I believe that the interviewer decided to not hire me from the beginning just because of my race.