Amazon Non Software Development Engineer interview questions

The first one is easy, just basic of finding number in array, but with multiple ways. The following is wired. The first interview on the second day is about net masking. The interviewer gave me an ambiguous description on that and is not quite helpful to be honest. When I wanna clarify something with him, he just say you can do whatever you want, which made me more confused. The second one on the second day is about graphical traversal and permutation.

Questions were easy. Asked for multiple ways to solve the same problem. Also asked some behavioral questions.