preparation revision topics: https://gist.github.com/rneha725/24f1759f8bc14dfbccf9f7703178c33f

• Rest API best practices: Link

Use Cases

• Active User on a page
• A lot use cases are covered by this human, he added a nice twists to existing problems and kept the discussion fresh. Link
• Concepts - Jordan Has no Life : Link

Use cases to cover most systems

• TinyURL
  • generating unique hashes or storing the unique value
• PasteBin
  • uploading and downloading huge files - chunking
• Chat messanger
• Feed systems
  • serving the feed with low latency
  • popular users
• video streaming
  • uploading/downloading huge files - chunking
  • comment editing or child comments
  • popular videos