Amazon Infrastructure Solutions Architect interview questions

5-6 short 30-40 min Phones calls with different individuals, prior to the onsite interview, Some technical, some general asking about various experiences. The onsite interview was grueling, 5 long hours of back to back questions from various individuals one sometimes two at a time. These questions required you to think off to top of your head, lot's of tell me about a time question, with how would you handle.