NVIDIA Support Engineer interview questions

interview with NVIDIA was the worst ever given by me in life. the interview panel was itself not technically sound and after about 15 different interviews for about 3 months by different interviewer`s with questions such as why their is a circular cover on a gutter man hole and like that i was rejected. if after all people in santaclara are going to give their final decision then why waste time in phone interviewing from various places in india .