Workflow Application - Design a system which requires interaction between users. Simplest example would be author > editor with the object being passed is an article. Author submits article, editor approves or rejects it. Can find other examples of this type of process in other fields.

Scope: Onboarding of authors and editors

High-Level Design: Signup and Sign-in (authentication)

Deep dive: Signup Email Username Password Phone number Sign - in: Email Password. Max. number of user a document can be shared with = 100 DB type: MongodB (NoSQL)

Wrap up: Data size for each user == 5kb, Total no of users = 5,000/year No of years for = 10years, Total space requirement = 5kb _ 5,000 _ 10 = 250,000kb = 250mb