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Quiz

2741 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 areas2741 Architecture Fundamentals81 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture78 Reliability & Resilience99 Observability92 Performance & Capacity Engineering90 Security Architecture95 Cost Architecture & FinOps92 Business Architecture93 Architecture Communication91 Enterprise Architecture91 Legacy Modernization92 AI-Era Architecture96 Software Architecture & Engineering84 Architecture Patterns84 Architecture Decision-Making91 The Architect's Meta-Skills92 Delivery & Release Engineering93 Platform Engineering & Developer Experience92 Testing & Quality Architecture102 Data Platform Architecture98 Streaming & Real-Time Data93 Data Governance & Semantics91 Frontend & Experience Architecture91 Edge, Mobile & IoT88 Regulatory & Data Protection Architecture90 Assurance, Audit & Model Risk98
Difficulty Any beginner intermediate advanced

2741 questions.

  1. Change Advisory vs Automated Gates advanced

    A payments and ride-hailing platform of Grab's shape replaced its weekly change advisory board with automated gates fourteen months ago. At 23:40 a configuration change reaches production through the emergency path and skips the canary stage. By 23:46 card authorisations are failing in two markets; recovery takes 51 minutes. The review finds that 38% of production changes in the previous quarter used the emergency path, median approval 90 seconds by whoever was on call. What failed?

    3 min answer change-controlbreak-glassdeployment-gatescoverage
  2. Change Advisory vs Automated Gates advanced

    An organisation's change advisory board is slow and, by its own incident data, is not preventing failures. What should replace it, and what genuinely requires human review?

    2 min answer change-managementgatesautomationdora
  3. Change Advisory vs Automated Gates advanced

    How would you replace a change advisory board without weakening control?

    2 min answer change-managementautomationgatesevidence
  4. Change Advisory vs Automated Gates advanced

    Reddit's 14 March 2023 outage ran 314 minutes after a Kubernetes 1.23 to 1.24 upgrade removed the node-role.kubernetes.io/master label that Calico route reflector selectors depended on, and Kubernetes has no supported downgrade. Sequence the next cluster upgrade so a gate can actually block it.

    3 min answer redditkubernetesupgradeautomated-gates
  5. Change Data Capture advanced

    A downstream team needs to react to order changes. The order service can publish events, or they can consume CDC from its database. Which, and why?

    2 min answer cdceventscouplingintegration
  6. Change Data Capture intermediate

    A logistics platform needs its operational database changes to reach a search index and an analytics warehouse. An engineer proposes writing to all three from the application. What is wrong, and what is the alternative?

    2 min answer portercdcdual-writeoutbox
  7. Change Data Capture intermediate

    A marketplace's search index lags several minutes behind catalogue updates and sellers complain their listings appear stale. Compare synchronous indexing, CDC pipelines and read-after-write patching at query time.

    2 min answer marketplacesearchcdcindexing
  8. Change Data Capture advanced

    A mobility platform wants operational database changes available to analytics and search within seconds, without adding load to the transactional databases. Design the change-data-capture pipeline and identify its principal failure modes.

    3 min answer cdclog-basedreplicationstreaming
  9. Change Data Capture advanced

    A team plans to publish database row changes via CDC as the organisation's domain events. What is wrong with that and what would you propose?

    3 min answer cdcoutboxdomain-eventscoupling
  10. Change Management vs CD advanced

    A regulated organisation's change management process requires approval for every production change, and the team wants continuous delivery. Are they compatible?

    2 min answer growwchange-managementcomplianceautomation
  11. Change Management vs CD advanced

    An enterprise change advisory process conflicts with continuous delivery. How can both requirements be met?

    2 min answer change-managementcdevidencerisk-classification
  12. Change Management vs CD advanced

    Most incidents in an organisation are caused by configuration changes rather than code deploys. How should configuration be versioned, canaried, validated and rolled back with the same rigour as code?

    3 min answer crowdstrikeconfigurationcanaryvalidation