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2707 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 areas2707 Architecture Fundamentals81 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture78 Reliability & Resilience88 Observability81 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 Architecture90 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

5 questions in Device Identity.

  1. Device Identity advanced

    A fleet of devices has certificates expiring in two years. What must be true today for that not to be an incident?

    2 min answer device-identityrotationprovisioningrevocation
  2. Device Identity advanced

    Design identity for devices that must authenticate to a platform for years, without a human present.

    1 min answer device-identitycertificatesrotationprovisioning
  3. Device Identity advanced

    How should device identity be established and maintained for a fleet, and what fails when it is done casually?

    2 min answer iotidentityprovisioningattestation
  4. Device Identity intermediate

    Review this design. A delivery-partner app on low-end Android phones reads a device identifier from the operating system at launch and uses it as the primary key of a devices table. The row holds the partner's current shift, an offline cash ledger and a per-device fraud limit. The identifier is Android SSAID or iOS identifierForVendor depending on platform. What would you remove, what would you change, and what would you leave alone?

    3 min answer device-identityandroidiosfraud
  5. 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