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2908 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 areas2908 Architecture Fundamentals91 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture87 Reliability & Resilience99 Observability92 Performance & Capacity Engineering100 Security Architecture95 Cost Architecture & FinOps102 Business Architecture103 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 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

6 questions in Static Stability.

  1. Static Stability advanced Multiple choice

    A marketplace's failover mechanism requires calling a control plane to provision replacement capacity. Why is this a design flaw, and what is the alternative?

    2 min answer static-stabilitycontrol-planefailovercapacity
  2. Static Stability intermediate

    A service fetches a feature flag value and a database credential from central services on every request. What is wrong?

    2 min answer amazoncontrol-planeavailabilitycaching
  3. Static Stability intermediate

    During a peak event, a platform's configuration service becomes unavailable. What should happen to the serving path, and what design property is being tested?

    2 min answer dream11static-stabilityconfigurationcontrol-plane
  4. Static Stability intermediate

    Explain static stability, and give two examples of designs that violate it.

    2 min answer awsresiliencecontrol-planeconcept
  5. Static Stability advanced Multiple choice

    On 22 July 2021 a software configuration update triggered a bug in Akamai's Edge DNS, and services were disrupted for roughly an hour until the update was rolled back. Consider a system whose control plane — the thing that distributes configuration — becomes unavailable while the data plane is untouched. What should happen to traffic?

    4 min answer akamaistatic stabilitycontrol planeconfiguration
  6. Static Stability advanced

    Your disaster recovery plan provisions capacity in the secondary region at failover time. Why is that a problem?

    2 min answer resiliencecontrol-planedr