NVIDIA interview questions

At first, I got a phone interview from HR staff. She asked me some questions about my prior experiences and minimum requirement they posted on the job position. After passed it, I got an another phone interview with team manager and he asked me some basic programming skills and hardware knowledge. Final step is to get a phone interview with senior manager. Most questions are based on the knowledge I learned in the class or my experiences that I described on my resume. All processes were finished in 2 weeks and I got a call from HR staff for my offer.