Amazon Networking Engineer interview questions

There was 2 phone interveews. After that the recruiter told me there were not interesting. First phone interveew - very junioer person. Asked me lot of questions about things not written anyvere on my resume. It was boring after while to say - no I dont know. I not think they will call me agein. Recruiter sent email that there will be 2nd interveew. This person ask interesting question. Ask me to design complicated database application. I have no problem. He also ask me trick question I dont know answer to. He was nice - tell me not my fault. At the end recruiter call me and tell me he dont want to call me in for interveew. I dont know what they look for and not find.