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Quiz

2868 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 areas2868 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 Communication102 Enterprise Architecture100 Legacy Modernization92 AI-Era Architecture96 Software Architecture & Engineering93 Architecture Patterns94 Architecture Decision-Making101 The Architect's Meta-Skills102 Delivery & Release Engineering103 Platform Engineering & Developer Experience92 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

2868 questions.

  1. InnerSource intermediate

    An organisation wants shared internal libraries maintained collaboratively across teams. What must be true for innersource to work, and when does it fail?

    2 min answer gustoinnersourceownershipcontribution
  2. InnerSource intermediate

    Team A is blocked for three weeks waiting on a small change from Team B. What are the options and what does each cost?

    2 min answer innersourcedependenciesbottleneckownership
  3. InnerSource advanced

    You maintain an internal library used by 60 teams. Your team of five also owns two products. Two teams have each opened a pull request adding something you do not want in the library - one a caching layer with its own configuration surface, the other a second serialisation format. Both teams are blocked on the outcome and both say innersource means they can contribute. Walk me through how you run this.

    3 min answer innersourcemaintainershipcontribution-contractreview-capacity
  4. Integration Patterns advanced

    A financial-data aggregator normalises hundreds of external bank APIs behind one interface. Where should the abstraction stop, and what happens when a provider does not fit?

    2 min answer plaidanti-corruption-layernormalisationintegration
  5. Integration Patterns intermediate

    A reporting API offers an export endpoint. For most customers it returns in eight seconds. For the largest it must process about 40 million rows, takes six to nine minutes, and the load balancer kills the connection at 60 seconds. Clients retry, which starts the export again. Design the endpoint.

    3 min answer async-request-replyhttp-202long-running-operationsidempotency
  6. Integration Patterns advanced

    A travel platform aggregates supply from hundreds of partners with wildly different protocols, latencies and reliability. Which integration patterns apply, and what is the most common structural mistake?

    2 min answer integration-patternsadaptersaggregationanti-corruption-layer
  7. Integration Patterns advanced

    Review this integration layer. An enterprise platform of SAP's shape defines a canonical Customer with 140 fields. Sixty source systems map into it and forty consumers read from it. Onboarding a new partner takes six weeks, most of it mapping. What would you remove, what would you change, and what would you keep?

    3 min answer sapcanonical data modelintegrationcoupling
  8. Integration Test Boundaries intermediate

    A grocery-delivery platform of the kind Instacart operates has 1,200 integration tests, all green, and an integration with the inventory service that has broken twice this quarter. The tests mock the inventory client. A developer proposes mocking less. Is that the fix?

    3 min answer integration testingmockstest boundariescontract testing
  9. Integration Test Boundaries intermediate

    A team replaces every in-process fake with the real dependency in a container, and defect escape rate falls. What have they bought and when does the bill arrive?

    2 min answer testcontainersintegration-testsci-costisolation
  10. Integration Test Boundaries intermediate

    For a service with a database, a message broker and two downstream HTTP dependencies, where do you draw the integration test boundary?

    2 min answer testingscopedesign
  11. Integration Test Boundaries advanced

    Nine teams share one integration environment where all 34 services run together. The 900-test suite takes three hours and a red run is usually somebody else's deploy rather than a defect. You have been asked to move to per-service tests with virtualised dependencies without interrupting the fortnightly release train. What is the sequence, and where can it go wrong?

    3 min answer integration-test-boundariesshared-environmentmigrationtest-doubles
  12. Integration Test Boundaries advanced

    Where should integration tests draw their boundary - at the service, at the database, or at the external dependency?

    2 min answer temporalintegration-testsboundariesfakes