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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

2827 questions.

  1. First-Principles Reasoning intermediate

    An architect faces a problem that resembles a known pattern but does not quite fit. How should first-principles reasoning and pattern recognition be combined?

    2 min answer zeptofirst-principlespatternsjudgement
  2. First-Principles Reasoning advanced

    When is first-principles reasoning the right tool for an architect, and when is it a waste of time?

    2 min answer first-principlesphysicsassumptionsjudgement
  3. First-Principles Reasoning advanced

    When should an architect reason from first principles and when should they pattern-match to known solutions? What goes wrong with each?

    2 min answer first-principlespatternsjudgementnovelty
  4. Fitness Functions advanced

    "Interview. You are the architect for a grocery marketplace where item availability changes constantly. Name three fitness functions you would put in CI to protect the architecture, and explain what each one would have caught." What makes a strong answer?

    2 min answer fitness-functionsciinstacartmarketplace
  5. Fitness Functions intermediate Multiple choice

    A broker's order-placement path has a 200ms p99 budget that quietly degraded over eighteen months without any single change being responsible. What kind of control prevents this, and where must it run?

    1 min answer fitness-functionszerodhalatency-budgetpipeline
  6. Fitness Functions advanced

    Architecture decisions in your organisation are either ignored or bottlenecked in a review board. Design something better.

    3 min answer governanceadrfitness-functionsprinciples
  7. Fitness Functions advanced

    In 2023 a team added a build rule forbidding the domain module from importing the persistence module, and it went green. In 2026 the domain module imports persistence in fourteen places and the build is still green. No one disabled the rule and no one edited it. Reconstruct how a passing check ended up protecting nothing.

    3 min answer fitness-functionsarchitecture-testingdriftsilent-failure
  8. Fitness Functions intermediate

    You want to enforce that the domain layer does not depend on infrastructure. How do you make it stick?

    2 min answer governanceautomationevolutionary
  9. Flaky Test Management intermediate

    A CI pipeline runs 2,400 tests in 18 minutes and fails about one run in four for reasons unrelated to the change. To stop the interruptions, the team enables automatic retry: any failing test is re-run twice, and the build is green if it passes on any attempt. What happens over the following six months?

    3 min answer flaky-testsciretriessignal-loss
  10. Flaky Test Management intermediate

    A suite has persistent flaky tests. Why is tolerating them worse than deleting them, and what policy works?

    2 min answer flakinesstrustquarantinepolicy
  11. Flaky Test Management intermediate

    A team's CI suite fails roughly one run in three for reasons unrelated to the change. Everyone reruns until green. How do you recover the situation?

    2 min answer testingflakinesscisignal
  12. Flaky Test Management intermediate

    A test suite has a 4% flake rate. The team re-runs failed builds. What is the actual cost, and what policy fixes it?

    2 min answer browserstackflakytrustpolicy