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2948 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 areas2948 Architecture Fundamentals91 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking96 API & Integration Architecture87 Reliability & Resilience99 Observability92 Performance & Capacity Engineering100 Security Architecture105 Cost Architecture & FinOps102 Business Architecture103 Architecture Communication102 Enterprise Architecture100 Legacy Modernization102 AI-Era Architecture106 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

4 questions in Streaming Schema Evolution.

  1. Streaming Schema Evolution advanced

    A producer added a required field. New consumers work. A consumer replaying from three months ago fails. Why, and what is the policy fix?

    2 min answer schemacompatibilityreplay
  2. Streaming Schema Evolution advanced

    An event schema must change while consumers and retained history both depend on the old version. How is this managed?

    2 min answer schema-evolutioncompatibilityregistryretention
  3. Streaming Schema Evolution advanced

    Review this. A payments platform runs 300 topics with the schema registry in FULL compatibility mode for every subject, a rule that each new field must be optional with a default, and a schema-change request that goes to an architecture review board with a three-week turnaround. Engineers have started putting new data into a generic metadata map to avoid the queue. What would you remove, what would you change, and what would you leave alone?

    3 min answer schema-registrygovernancecompatibilitypayments
  4. Streaming Schema Evolution advanced

    Walk me through retiring a field from an event consumed by around 40 teams, where the field is populated from a system being decommissioned in six months.

    2 min answer schema evolutiondeprecationconsumer censuscompatibility