Amazon Non Software Development Engineer interview questions

I got a phone interview from amazon. The interviewer is very nice. I was asked to introduce my background includin some projects I participated in and he asked some questions for those projects. I was asked a coding question, 2-sum, given an int array and a target number find a pair of numbers, the sum of which is equal to the target number.

applied on-campus and got and email asking to schedule a phone interview. After the first interview was asked to schedule a second one. both phone interviews both technical in nature and lasted 45 min.