NVIDIA Developer interview questions

I was contacted by Nvidia's recruiter. They first scheduled a one-on-one interview, followed by two phone interviews [second gentlemen was calling out of Germany ]. The phone interviews were straightforward with one or two "trick" questions. The one-on-one interview was also straightforward but the gentelmen who I was talking with appeared to be very cocky and somewhat rude. At the end of the interview he went on to comment on my coding skills, which he described as OK for someone with my experience. This is considering that I solved his problem correctly and was invited to do two more phone interviews.