Amazon Web Services Software Developer Engineer interview questions

First I got an email from Recruiter asking for a call. During the call I answer default interview questions and was moved to an Online Assessment to be done in 7 days through HackerHank. The online assessment was 2 questions, one medium and another hard. In the medium question, I had 8/14 tests passed, and 4/14 tests passed in the hard one. Then I didn't move forward.

First Round: First round is online test, which has four sections.section-1 has quantitative aptitude, logical reasoning questions.sections-2 has technical questions related to c, c++, java, dbms, os and networks.section-3 has 2 coding questions.section-4 has technical questions related to bigdata, cloud computing and data science.time given is 2 hours.They shortlisted 41 students out of 450. Second Round: Technical round:asked general questions about networking, os and troubleshooting. 1.What are the advantages of having virtual memory? 2.How to trouble shoot windows system which has booting problems? 3.gave one simple code to implement and some general questions 16 students shortlisted for the next round. Third Round: Technical round:asked all networking questions. 1.What are the softwares you have used? 2.How to prevent SYN DDoS attack? 3.How to indentify fake IPs? 4.What is the difference b/w private IP and Public IP? 5.questions related OSI and TCP layers 6.Port numbers of different protocols 7.What happens when you type on your browser? 8.questions related to DNS to clear this round you have to be master in networking. 12 students shortlisted for the next round.