Design a system like BookMyShow where an end user should be able to search movies & cinema in different cities. He should be able to make seats selection and book tickets. What are different technologies and components will you use to design this and what could be main challenges? What are different caching mechanism and how & why would you use them? What are difference between SQL and NoSQL (Mongo db)? How would you solve concurrency issues? How does Node.js able to take multiple requests from client asynchronously even when it is single threaded? How the db durability is ensured? What is ACID? What is load-balancer and how & why will you use?
