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Quiz

2908 questions of the kind that actually get asked — in interviews, in architecture review boards, and by the person who has to run the thing at 3 AM. Every answer states the trade-off rather than the slogan, and says when the obvious choice is the wrong one.

All areas2908 Architecture Fundamentals91 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture87 Reliability & Resilience99 Observability92 Performance & Capacity Engineering100 Security Architecture95 Cost Architecture & FinOps102 Business Architecture103 Architecture Communication102 Enterprise Architecture100 Legacy Modernization92 AI-Era Architecture96 Software Architecture & Engineering93 Architecture Patterns94 Architecture Decision-Making101 The Architect's Meta-Skills102 Delivery & Release Engineering103 Platform Engineering & Developer Experience102 Testing & Quality Architecture102 Data Platform Architecture98 Streaming & Real-Time Data103 Data Governance & Semantics91 Frontend & Experience Architecture101 Edge, Mobile & IoT98 Regulatory & Data Protection Architecture99 Assurance, Audit & Model Risk98
Difficulty Any beginner intermediate advanced

5 questions in CRDTs.

  1. CRDTs advanced

    A collaborative field-notes app uses a CRDT set per project so devices can edit offline and merge without a server decision. Two years in, projects that are heavily edited take 40 seconds to open on a mid-range phone and the local database is 900 MB. Nothing has failed. What is happening, and what would you have designed differently?

    3 min answer crdtstombstonesmetadatafigma
  2. CRDTs advanced

    A collaborative product must let several devices edit the same records, including offline. When are CRDTs the right answer, and when is server authority simpler?

    2 min answer linearcrdtsyncconflicts
  3. CRDTs advanced

    A team proposes CRDTs for a collaborative document editor. What do you check before agreeing?

    2 min answer crdtcollaborationtradeoffs
  4. CRDTs advanced

    An inspection app keeps each site's checklist in an observed-remove set CRDT and synchronises by sending the whole replica state on every reconnect. 6,000 devices on cellular, roughly 40,000 elements per site set, about eight reconnects a day. Roughly how many bytes per device-day, and what does the number rule out?

    2 min answer crdtsor-setdelta-statebandwidth
  5. CRDTs advanced

    Conflict-free replicated data types guarantee convergence without coordination. What do they cost, and when is the guarantee not enough?

    1 min answer crdtsconvergencecollaborationmetadata