**Recently my friend had an experience of CSA Amazon 2020:**\n\n\n**First Online assessment**: It is based on the fundamentals of networking, database, and deployment. When I say "fundamentals", it does not mean that they ask very basic questions. The level is high for example, in networking - you could see questions like " How many IP addresses can be made from class B? OR finding out which subnet the IP address is? The more challenging part in this is - each question needs to be answered in like 2 minutes\' time. So have an in-depth understanding of these concepts.\n\nOnce you passed OA, next they will schedule 4 virtual video rounds after 2 weeks.\n\nUsually, they will focus on two things: Databases and Deployments [ they ask your choices when you fill out the application or somewhere during the process ]\n\n**First-round**: Very in-depth questions and scenario-based questions.\n\nWhat will you check if your website is slow? What if that website and user are in china or some other place? What tools you would use to debug?\nExplain wht hapns when we type example.com?\nWhat is inode? What if the server is not responding?\nLinux networking tools? commands ? du vs df ? swap memory ? boot processes ?\ntraceroute vs ping ?\ndocker commands ?\nCI CD ?\nHow will you test a service? etc. and many more questions\nSome LP behavioral questions.\n\n**Second round**: LP Completly behavioral and resume based. But make sure to be ready with follow up questions. [ Amazon level behavioral - remember level is very high]\n\n**Third round**: Focussed on databases and other concepts\n\nQueries\nJoins, locking, distributed databases\nDNS resolution\nWhat if queries are slow? what you will do to increase speed?\nWhat is the disadvantage of indexes?\nDatabase tuning?\netc + LP questions\n\n**Fourth round**: LP completely behavioral.\n\nMy friend was not having much experience with the above concepts. Therefore, he gave many wrong answers ultimately with a rejection.\nI personally feel that you cannot answer most of the above questions without prior experience in cloud+linux+development+databases. Even though you feel that reading concepts would help you to crack the interview, I do not feel so. ..But take the experience and learn from it!!!\n\nBest of Luck!

Recently my friend had an experience of CSA Amazon 2020:\n\n\nFirst Online assessment: It is based on the fundamentals of networking, database, and deployment. 