Amazon Security Engineer interview questions

First round - Screening and technical I was asked to explain about PKI, OWASP top 10, threat modeling, PFS, and few behavioral questions. The interviewer did not ask me anything from my resume which was really strange. The gap between first and second round of interview was 15 days, however, interestingly I had received a feedback email from Amazon where I had to rate their interview process. My gut feeling suggested that Amazon did not want to proceed with my candidacy, but in the email it was mentioned that "...no way this email suggests that your interview process with Amazon has ended. Please contact your respective hiring manager for updates". I was like ....OK. So they finally scheduled my second round of interview. I was told that it will be an Amazon leadership + technical round. On the day of the interview, the interviewer(s) probably had made a decision about my candidacy even before the second round because I was able to feel the lack of enthusiasm and curiosity in the interviewer's voice. Also I feel that the second round was more of a formality than to really gauge my knowledge and skills. Nevertheless I gave my best shot. However the dull attitude and lack of energy in the interviewer's voice and the fact that the interviewer said "good luck and take care" towards the end of the interview made my gut feeling even stronger. I knew then and there that Amazon was not going to go forward with my candidacy. Soon, I was officially informed via email that Amazon will not be going forward with my application (which i kinda knew because i had the gut feeling from the second round of interview). Overall i believe the process could have been better and transparent.