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infosys · data-scientist · sql-databases

Design a system for real-time collaborative document editing. Focus on conflict resolution and latency.

Difficulty: Medium

Overview

Tests OT/CRDT awareness, real-time architecture, and trade-offs.

Example Answer

  • Use CRDTs for offline-friendly merging and a WebSocket sync layer.
  • Persist operations to an append-only log and rebuild state on demand.

Tips

  • Start with requirements: offline, latency, scale.
  • Compare OT vs. CRDT.
  • Describe storage and sync strategy.

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