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Quiz

2667 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 areas2667 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 Architecture86 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 Architecture88 Streaming & Real-Time Data93 Data Governance & Semantics81 Frontend & Experience Architecture91 Edge, Mobile & IoT88 Regulatory & Data Protection Architecture90 Assurance, Audit & Model Risk88
Difficulty Any beginner intermediate advanced

993 questions.

  1. Clean Architecture intermediate

    Review this design. Every repository method opens its own transaction and commits before returning. One use case calls four repositories and then publishes an event. Support reports occasional orders with a payment row and no shipment row. What would you change and what would you leave alone?

    3 min answer clean architectureunit of worktransactionsoutbox
  2. Client Caching & Data Layer intermediate

    A single-page application shows stale data after a user makes a change elsewhere in the product. How should client-side caching and invalidation be designed?

    2 min answer client-cacheinvalidationoptimistic-updatesstaleness
  3. Client Caching & Data Layer intermediate

    Users complete an action and the interface still shows the previous value until they refresh. Diagnose.

    2 min answer frontendcachinginvalidation
  4. Client State Architecture intermediate Multiple choice

    What is the difference between server state and client state, and why does conflating them cause bugs?

    2 min answer statecachingsynchronisationurl-state
  5. Cloud Architecture intermediate

    A cost-sensitive education platform must serve large enrolment spikes and heavy video delivery on a tight budget. Which architectural choices give the largest cost reduction per unit of effort?

    2 min answer physics-wallahcostcdnegress
  6. Cloud Architecture intermediate

    A team tells you backups run nightly and are retained for 30 days. What is missing from that answer?

    2 min answer backupdisaster-recoveryverificationransomware
  7. Cloud Architecture intermediate Multiple choice

    A team wants to build a new internal API on serverless functions. It will serve steady traffic of about 200 requests per second during business hours. What do you advise?

    2 min answer serverlesscontainerscostdecision-making
  8. Cloud Databases intermediate Multiple choice

    A managed database performs a routine minor-version upgrade with a 40-second failover. The application returns errors throughout. Whose problem is this?

    2 min answer managed-servicesfailoverresilienceretries
  9. Cloud Databases intermediate

    A multi-product SaaS company runs its own database clusters on cloud instances and is considering moving to the provider's managed database service. What evidence should decide it?

    2 min answer managed-servicesdatabasesoperational-costatlassian
  10. Cloud Databases intermediate Multiple choice

    A serverless API works in testing and fails under load with connection errors. The database is at 5% CPU. Explain and fix.

    2 min answer serverlessconnectionsproxyscaling
  11. Disaster Recovery intermediate Multiple choice

    A grocery-delivery marketplace peaks for three hours on Sunday morning and keeps orders in a single-region managed Postgres with multi-zone failover. After a competitor's regional outage the board asks for a 15-minute recovery time and zero data loss against the loss of the whole region. Which posture should the team adopt?

    3 min answer cloud-disaster-recoveryrpo-rtowarm-standbyentity-homing
  12. Disaster Recovery intermediate

    An enterprise platform with strict availability commitments must define its disaster recovery strategy. How should RTO and RPO targets drive the choice between backup restore, warm standby, and active-active?

    2 min answer disaster-recoveryrtorpocost