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Quiz

2777 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 areas2777 Architecture Fundamentals81 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-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 Architecture99 Assurance, Audit & Model Risk98
Difficulty Any beginner intermediate advanced

2777 questions.

  1. Device Identity advanced

    You inherit an IoT fleet of 80,000 devices whose client certificates all expire in fourteen months. What do you do?

    2 min answer iotcertificatesrotationrisk
  2. Device Provisioning intermediate

    A consumer device sells 600,000 units in the fourth quarter and most of them are gifts. Roughly how many first-boot provisioning requests per second should the platform be sized for on the morning of 25 December, and what does the number rule out?

    3 min answer provisioningcapacitycertificatesactivation
  3. Device Provisioning advanced

    A fleet of connected devices needs credentials. What does secure provisioning require, and what is the failure that ends the programme?

    2 min answer atheridentityprovisioningrotation
  4. Device Provisioning advanced

    Design provisioning for devices manufactured in volume and deployed by non-technical installers.

    1 min answer provisioningbootstrapsupply-chainidentity
  5. Device Provisioning intermediate

    Devices are provisioned on a contract manufacturer's line: each unit boots, calls your cloud provisioning service, receives a unique certificate, and is boxed. At 02:00 on a Saturday your provisioning service becomes unreachable from that factory. The line runs three shifts and cannot stop. What happens next, and what should the design have been?

    3 min answer provisioningmanufacturingavailabilitycertificates
  6. Device Telemetry at Scale advanced

    A fleet platform emits 25 metric series per device, tagged with device id, for 400,000 devices. The observability bill is now larger than the compute bill for the platform itself. The team proposes dropping the device id tag and keeping per-model and per-region aggregates. What does that buy, what does it give up, and when does the bill arrive?

    3 min answer cardinalitytelemetrycostdiagnosis
  7. Device Telemetry at Scale advanced

    A logistics platform receives location updates from a large fleet every few seconds. Where should volume be reduced, and what is the ordering of leverage?

    2 min answer delhiveryportertelemetryfiltering
  8. Device Telemetry at Scale advanced

    A ride-hailing platform receives location updates from hundreds of thousands of active drivers every few seconds. Design the ingest and serving path.

    2 min answer ubergeospatialingestionreal-time
  9. Device Telemetry at Scale advanced

    Design telemetry collection where the volume of monitoring data would cost more than the systems being monitored.

    2 min answer telemetrycardinalitysamplingcost
  10. Digital Sovereignty advanced

    A customer requires data sovereignty. What three questions do you ask before designing anything?

    2 min answer sovereigntyresidencyaccessexit
  11. Digital Sovereignty advanced

    A government customer requires that no foreign entity can access their data or compel its disclosure. What are the options and what does each cost?

    1 min answer sovereigntyjurisdictionencryptionoperations
  12. Digital Sovereignty advanced

    A public-sector customer requires that their data stay within the EU, including support interactions. Your cloud provider offers an EU data boundary and your own support rota is global. What does meeting this actually require, and what does it cost?

    3 min answer data-residencysovereigntysupport-dataeu-data-boundary