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Quiz

2948 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 areas2948 Architecture Fundamentals91 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking96 API & Integration Architecture87 Reliability & Resilience99 Observability92 Performance & Capacity Engineering100 Security Architecture105 Cost Architecture & FinOps102 Business Architecture103 Architecture Communication102 Enterprise Architecture100 Legacy Modernization102 AI-Era Architecture106 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

2948 questions.

  1. Negotiation advanced

    Product wants a date the design cannot meet. How do you approach the conversation?

    2 min answer negotiationinterestsoptionstradeoffs
  2. Negotiation advanced

    SAP has published that mainstream maintenance for the SAP Business Suite 7 core applications runs to the end of 2027, with optional extended maintenance from 2028 to the end of 2030 at a premium of two percentage points on the maintenance base. Your conversion programme is estimated at 30 months and has not started. Which date do you take into the funding conversation, and what would be wrong to conclude from the published one?

    3 min answer sapvendor maintenancedeadlinesprogramme planning
  3. API Gateways advanced

    A blockchain infrastructure provider serves RPC requests where a small number of query types are enormously more expensive than the rest. How should the request path be structured?

    2 min answer polygonrpcclassificationcaching
  4. API Gateways advanced

    An API platform serving millions of external developers must place authentication, rate limiting, quotas, retries, idempotency and tenant isolation. Which belong at the gateway and which must live deeper?

    2 min answer api-gatewayrate-limitingidempotencymulti-tenancy
  5. API Gateways advanced

    Your API gateway configuration has grown to 8,000 lines with request transformations and cross-service orchestration. Changes require a platform team ticket and take two weeks. How do you fix this?

    2 min answer api-gatewaycouplingplatformtimeouts
  6. Network Performance advanced

    A connected-vehicle fleet sends telemetry over unreliable mobile networks with limited bandwidth and intermittent connectivity. What protocol and session characteristics matter, and what is the wrong choice?

    2 min answer atheriotmqttconstrained
  7. Network Performance advanced

    A global SaaS product has a 200 ms p95 API budget. Users in Sydney see 900 ms against a single US-East deployment. The application team says the service responds in 40 ms. Who is right and what do you do?

    2 min answer latencyrttglobalcdn
  8. Network Performance intermediate

    A managed database platform sees connection exhaustion when customers run serverless functions against it. Why does this happen and what is the fix?

    2 min answer supabaseconnection-poolingserverlessdatabase
  9. Network Performance advanced

    A search tier fans every query out to 60 shards and merges the replies. The merged p99 jumps from 40 ms to 240 ms, with a few requests at 440 ms. Shard CPU is flat, no individual shard's p99 moved, and the latency increments are almost exactly 200 ms. What failed?

    3 min answer incasttcpfan-outswitch-buffers
  10. Network Performance advanced

    A short-video platform finds that video startup time, not playback quality, is the strongest predictor of engagement. Which network-level optimisations matter most?

    2 min answer latencystartup-timeprefetchquic
  11. Network Performance advanced

    An API's latency histogram is bimodal. Most requests finish in about 40 ms and roughly 0.8% land between 240 ms and 1.3 s. The pattern is independent of endpoint and instance and payload size, server-side handler time is flat at 12 ms, CPU and queue depth are normal, and no error is logged. Where is the time going, and what do you change?

    3 min answer packet lossretransmissionrtotail latency
  12. Network Performance Tuning advanced

    A client library opens a new HTTPS connection for every request. One host sends 2,000 requests per second to a single destination endpoint. What breaks first, and in what order does everything else follow?

    2 min answer tcptime_waitephemeral portstls