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System Design for Python Juniors
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Module 6 · Real-World System Design Cases
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Design Google Docs: collaborative editing
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📝 **Question:** Modern default for new collaborative apps? 📋 Pick the right answer. 💡 **Hint:** Re-read the theory above if unsure.
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📝 **Question:** Modern default for new collaborative apps? 📋 Pick the right answer. 💡 **Hint:** Re-read the theory above if unsure.
A
Operational Transformation (OT) — Google Docs' historical algorithm remains the default for new editors that need a central authoritative server.
B
CRDTs (Yjs, Automerge) — simpler, peer-to-peer friendly, more popular in new apps (Figma, Linear, Notion).
C
Last-write-wins per cell with a sub-second sync — chosen because conflict resolution becomes trivial when you accept lost edits.
D
Pessimistic locking on each paragraph so only one editor at a time may modify a section — a simpler model than convergence.
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