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Quiz

2827 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 areas2827 Architecture Fundamentals91 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture87 Reliability & Resilience99 Observability92 Performance & Capacity Engineering90 Security Architecture95 Cost Architecture & FinOps92 Business Architecture93 Architecture Communication91 Enterprise Architecture100 Legacy Modernization92 AI-Era Architecture96 Software Architecture & Engineering93 Architecture Patterns84 Architecture Decision-Making101 The Architect's Meta-Skills92 Delivery & Release Engineering103 Platform Engineering & Developer Experience92 Testing & Quality Architecture102 Data Platform Architecture98 Streaming & Real-Time Data93 Data Governance & Semantics91 Frontend & Experience Architecture101 Edge, Mobile & IoT98 Regulatory & Data Protection Architecture99 Assurance, Audit & Model Risk98
Difficulty Any beginner intermediate advanced

102 questions in Testing & Quality Architecture.

  1. Testing in Production advanced

    "Testing in production" is either professional practice or negligence depending on what is meant. What are the legitimate forms, and what must be true for each?

    2 min answer testing-in-productioncanarysyntheticfeature-flags
  2. Testing in Production advanced

    A canary takes 5% of traffic on a new build and is compared with the baseline on error rate and p99. What happens if the load balancer sends only new connections to the canary?

    3 min answer canaryprogressive-deliverysampling-biasguardrails
  3. Testing in Production advanced

    A team wants to test in production. What does that legitimately mean, and what does it require first?

    2 min answer lineartesting-in-productioncanarysynthetic
  4. Testing in Production advanced

    On 1 August 2012 Knight Capital lost roughly $460M in about 45 minutes. The SEC's 2013 order records that new order-routing code had been rolled out to eight servers over several days and a technician did not copy it to one of them, where a flag reused by the new code reactivated dormant functionality. Every unit and integration test had passed. Which variable was never under test, and what check would you add?

    3 min answer knight-capitaldeploymentrelease-verificationblast-radius
  5. Testing in Production advanced

    What does testing in production genuinely mean, and what must exist before it is responsible?

    2 min answer testing-in-productionflagscanaryobservability
  6. Testing in Production advanced

    You propose shadow traffic and canary analysis. A risk officer says "you are testing on customers". How do you respond?

    2 min answer governanceriskcommunication