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Quiz

2667 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 areas2667 Architecture Fundamentals81 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture78 Reliability & Resilience88 Observability81 Performance & Capacity Engineering90 Security Architecture95 Cost Architecture & FinOps92 Business Architecture93 Architecture Communication91 Enterprise Architecture91 Legacy Modernization92 AI-Era Architecture86 Software Architecture & Engineering84 Architecture Patterns84 Architecture Decision-Making91 The Architect's Meta-Skills92 Delivery & Release Engineering93 Platform Engineering & Developer Experience92 Testing & Quality Architecture90 Data Platform Architecture88 Streaming & Real-Time Data93 Data Governance & Semantics81 Frontend & Experience Architecture91 Edge, Mobile & IoT88 Regulatory & Data Protection Architecture90 Assurance, Audit & Model Risk88
Difficulty Any beginner intermediate advanced

34 questions in Reliability & Resilience.

  1. Availability Mathematics intermediate Multiple choice

    A service depends on four components, each independently 99.9% available, called in sequence on every request. What is the resulting availability, and what does this imply about architecture?

    2 min answer availabilitydependenciesredundancymath
  2. Availability Mathematics intermediate

    A stakeholder requires 99.99% availability. Your service depends on five internal services each offering 99.9%. What do you say?

    2 min answer availabilitydependenciesrequirements
  3. Chaos Engineering intermediate

    A mobility platform wants to start chaos engineering. Its dispatch system is business-critical and the team is nervous. What is a responsible starting sequence, and what must exist first?

    2 min answer chaos-engineeringresilience-testingblast-radiusgrab
  4. Chaos Engineering intermediate

    A team wants to adopt chaos engineering after reading about it. What must be in place first, what is the correct progression, and what does chaos engineering not tell you?

    3 min answer netflixchaos-engineeringgame-daysresilience-testing
  5. DR Testing intermediate

    A core internal service has run continuously for three years. What risk does that create?

    2 min answer awscold-startrecoverytesting
  6. DR Testing intermediate

    An enterprise runs an annual disaster recovery test that always succeeds, yet the team has low confidence in real recovery. What is likely wrong with the test?

    2 min answer dr-testingdrillsrealismenterprise
  7. Fault Isolation intermediate

    A design platform's synchronous editing experience and its asynchronous export rendering share a compute cluster. Exports occasionally saturate it and the editor becomes unusable. What would you change?

    2 min answer fault-isolationbulkheadsworkload-separationcanva
  8. Game Days intermediate

    Design a game day for a payment service. What is the scenario, who is in the room, and what counts as success?

    2 min answer game-dayrehearsalincident-responsereadiness
  9. Graceful Degradation intermediate Multiple choice

    A recommendation service is unavailable during a high-traffic period. Should the application show popular items, cached recommendations, results from an older model, or nothing at all?

    2 min answer graceful-degradationfallbackpersonalisationreddit
  10. Graceful Degradation intermediate

    A streaming service's homepage assembles rows from a dozen personalisation services. One returns 4-second latency instead of 40 ms. What happens, and what should have been designed?

    2 min answer netflixfallbacktail-latencyfan-out
  11. Graceful Degradation intermediate

    The recommendation service is down. Walk through every level of degraded response and say who decides which one is used.

    2 min answer degradationfallbacknetflixproduct
  12. Graceful Degradation intermediate

    What distinguishes a real graceful-degradation capability from an aspiration, and how do you design and validate a degradation ladder?

    3 min answer degradationkill-switchfallbackresilience