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Coding Challenges

5,893 curated questions across every arena — browse by topic, then jump into a live 3-minute battle to put them to the test.

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5 challenges matching your filters

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  • Multiple ChoiceBeginner

    Offline-first sync: conflict-free field types

    offline-firstcrdtconflict-resolution
  • Multiple ChoiceHard

    CRDT vs OT for collaborative editing

    crdtcollaborative-editingot
  • Multiple ChoiceHard

    OR-Set vs LWW register semantics

    crdtor-setconflict-resolution
  • Multiple ChoiceBeginner

    CRDT vs OT for Collaboration

    collaborationcrdtot
  • Code AnalysisHard

    CRDT operation design

    crdtcollaborative-editingcode-analysis

Practice now, dominate the arena

Every challenge here is drawn from the live Code Royale pool. Review a question, then head to the arena to answer under pressure against a real opponent — 3-minute matches, Elo ranking, and badge tiers on the line.

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