NVIDIA interview questions

Initial call was 1 hour, and was mostly quick-fire questions about tech relevant to the role I applied for. The initial email gave some hints about what topics to focus on. The interviewer also gave a lot of information about the role and team. Second interview was a live coding interview conducted over HackerRank. Questions were pretty straightforward, a few string manipulation questions, a recursive function, parsing a config file with regex. Interviewers were not very engaged. I asked if I could look at documentation for a Python function and the interviewer said "Uh, probably not", which was confusing. When I asked questions I had to repeat myself because they were doing something else. This was scheduled for 1 hour but took closer to 2. I got 2/6 correct and received an automated rejection email after this stage. I would have liked to see them make more of an effort to set the tone, and be clear up front about the rules for the interview. I also think documentation should have been allowed.