System Design Interview Crash Course

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Design Google Docs

Here is a detailed system design for Google Docs.

1. Problem Definition and scope

We are designing a cloud-based, real-time collaborative document editor.

The core challenge is allowing multiple users to edit the same text file simultaneously, ensuring everyone sees the same content eventually without data loss or conflicts.

  • Main User Groups: Document creators, editors, and read-only viewers.

  • Main Actions: Creating documents, typing text (insert/delete), and viewing changes from others in real-time.

  • Scope:

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