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First Loop Interview: This round was purely techincal (This can be the case sometimes. Some other times, all 5 rounds in Loop for level 5 in Amazon will be behavioural only. Ask for this information from your recruiter) How does HTTPS work? Brief on SSL/TLS encryption mechanism? What happens in the background when you search for amazon.com? Explain Garbage collection? What is Inode in Linux? Explain Data deduplication? How is this useful? Where is it used? What is RAID? different levels of RAID? Differences between File Storage, Block storage, Bulk/Object Storage? This can be also asked as DAS, SAN? Questions on Deep networking concepts such as Packets, Packet switching, Routers vs Switches, IP/TCP protocols Differences on IP, TCP, UDP protocols. Differences between error detection, best performance in these protocols. Are you aware of MPLS? Difference between Latency & Bandwidth? Security vs Compliance? Difference between Availability & Durability as applied to S3 buckets and in general? HDD and SDD storage mechanism? What is LAMP stack? How do you design API? How to make them more usable? What is web crawling, web scraping? Why are they used? Differences between Data modelling vs Data Lake? How are they related? What is Blue-green deployment? Why is it used? Which AWS product supports this? What is IaaS, SaaS, PaaS? Examples in AWS for these ACID vs BASE with respect to DBs? Which one is suited in what scenario? What are different services in AWS used for 1. Security solutions 2. Logging systems 3. Cost & related topics 4. Migration services 4. DDos Attack prevention When will you use ECS vs EKS? What is Fargate, Aurora, Lambda and their use cases. How will you enhance network performance and Dynamo DB performance? All of these questions will have follow up based on what you answer. Second round: Complete Behavioural questions: This was the same person who took my first screening interview, before my Loop interview, he was very friendly. He asked only 2 LP questions which took about 45 minutes. Explained a bit about the project for which they were hiring me and gave me about 10 minutes to ask any questions I had. Third round: Complete behavioural questions: This round was with hiring manager, with a reverse Shadow present with him to help the manager with follow up questions. Here I was asked 4 LP questions, I had no time to ask my questions at the end. Fourth round: Complete behavioural questions: Here I was asked 3 LP questions. We had a good 10 minute chat at the end of the interview with the questions I had. Round 5: Behavioural questions only (I think this was the bar raiser interview) He asked 3 LP questions with a lot of follow up questions. These are the behavioural questions asked to me in Round 2 to Round 5 of LOOP interviews: Why Amazon? Why this role? - 2 people asked the same. Please prepare well for these questions. What was the most Challenging problem you solved and what did you learn from it? How you did Influence people without enough data? Tell me a time when you Disagreed with manager? Time when Were not able to deliver commitment to customer and how did you deal with it? Tell me a time you delivered in tight timeline. When you had adjust quickly to a change in strategy When you delivered outstanding results Tell about a Calculated risk and how it succeeded When you didn’t compromise your standards About a Challenging Customer and how did you deal with it? How you realised that a customer needed a solution, without customers asking for the same and they weren’t even aware that they actually needed it About a time when there’s a Conflict within your team? Time when you had to Challenge a decision customer already made? They got back to me in 4 days with a positive feedback :) Less