NVIDIA IT Engineer interview questions

Got the call from recruiter and it was scheduled a day after i received the call it was a face to face interview which went on for around 90 min...detailed walk through of various basic and advanced concepts and few latest technologies..followed by the profile and work culture description. Second round was a telephonic interview with senior managers and technical guy at US Headquarters again few basic concepts validation related to technology and whatever was mentioned in resume as hobbies and all. Then there was a HR negotiation round.