Amazon Cloud Support Engineer interview questions

I applied to this job thru referral. First round was online assessment which i passed. Second and third rounds were technical(linux and network). They asked too deep so i couldnt answer some of them. Interviwers were not friendly while interviewing. Still i had a fourth round with two managers. The discussion went well. They gave me one more chance to attend technical rounds. But i didnt take that opportunity. Because I felt uncomfortable with tech interviewers attitude. I decided dont want to be a part of such team. I always worked with IT giants. I am not dying to be a part of such unfriendly team. Company maybe good but interviewers need training.

Intially we had a online test assessment and the selected Students had a one day interview with 3 rounds.We had 3 rounds first was related to operating system then we had network round and the final was HR