1:self-intro (3min) 2:tough experience (~10min) 3:case that you work out of the scope of your responsibility (~10min) 4:amazon is considering whether to dispense a 10% or 20% coupon on the computing resource, find your way to evaluate the potential result, with only access to the data of Amazon its own but nothing outside the company.

they help me reschecule the interview. very nice team. if you meet any problem, feel free to talk with them. i will update my interview later. but i talked with an economist interviewer, he mentioned if you didn;t target, they will guide you. so focus on their questions. that what they want to know