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2988 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 areas2988 Architecture Fundamentals91 Distributed Systems111 Data Architecture100 Cloud Architecture97 Networking96 API & Integration Architecture97 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

5 questions in Test Pyramid Shapes.

  1. Test Pyramid Shapes beginner Multiple choice

    A team has 3200 unit tests that run in 90 seconds, 40 integration tests and 12 end-to-end tests. Over six months it shipped 19 defects to production and 14 of them were wiring faults - a wrong column name in a query, a header the downstream service rejected, a queue bound to the wrong exchange. Which change to the suite's shape actually addresses that?

    3 min answer test-pyramiddefect-escapeintegration-testswiring-defects
  2. Test Pyramid Shapes intermediate

    A team is told its test suite should be a pyramid. When is that shape wrong?

    2 min answer growwpyramidriskintegration
  3. Test Pyramid Shapes beginner Multiple choice

    A team's pull-request suite has grown from 4 minutes to 26 minutes over a year, because every bug fix added a test and nothing was ever removed. No one has ever proposed deleting a test. What has the team given up, and which policy fixes it?

    2 min answer ci-feedback-timetest-budgetbatch-sizesuite-growth
  4. Test Pyramid Shapes intermediate

    A team's test distribution is an inverted pyramid — many end-to-end tests, few unit tests. What does that cost, and what causes it?

    2 min answer test-pyramidcostflakinessarchitecture
  5. Test Pyramid Shapes beginner

    Two tests exercise the same line of code. One starts the process and drives the HTTP API; the other calls the function directly. Once you look at the failure signal rather than the code covered, what actually distinguishes them?

    2 min answer test-pyramidfeedback-loopdiagnosisci