NVIDIA interview questions

3 phone interview, 2 technical and 1 interpersonal with the hiring manager. First phone interviews technical question was to write a binary search tree class in C, it should implement insertions, deletions and search functions. Second interview technical question was to implement a clipping algorithm in pseudo-code that could handle more clip windows than were supported in hardware. Third interview had a number of personal and moral questions. Made it to the on-site. Was asked to write my own implementation of Tail in C, was asked to write an algorithm in C that would determine if a point lay within any polygonal bounding area, and was asked to write a function that could print any UTF string in reverse. Lunch interview where I was allowed to ask question about the company, and then a personal interview with HR and the hiring manager.