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Quiz

2741 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 areas2741 Architecture Fundamentals81 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture78 Reliability & Resilience99 Observability92 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 Architecture102 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

2741 questions.

  1. Correlation IDs beginner

    A request fails somewhere in a chain of five services. Each service logs the error clearly, with a timestamp and a message. Why is finding the five lines that belong to that one request still hard, and what single change fixes it?

    3 min answer correlation idsloggingtracingpropagation
  2. Correlation IDs intermediate

    An API platform's requests trigger asynchronous work, webhook deliveries and retries, sometimes hours later. How should correlation identifiers be designed so a customer question can be answered end to end?

    2 min answer correlation-idscausalityasyncsupport
  3. Cost Allocation advanced

    A multi-tenant platform needs to know what each customer costs to serve. What makes this hard, and how is it approached?

    2 min answer cost-allocationmulti-tenancyshared-resourcesattribution
  4. Cost Allocation intermediate

    Forty percent of your cloud spend is untagged. What do you do?

    2 min answer taggingallocationgovernanceenforcement
  5. Cost Allocation advanced

    Tag coverage is at 98% and teams still argue about their bill every month. Roughly a fifth of the spend is shared - the service mesh, the log pipeline, NAT gateways, the Kafka cluster, and the commitment discounts. How would you allocate it?

    3 min answer cost-allocationshared-costsshowbackcommitments
  6. Cost & FinOps advanced

    A design review presents a new event-driven platform. What cost questions do you ask before approving it?

    2 min answer finopscost-modelreviewegress
  7. Cost & FinOps intermediate

    A platform's cloud spend grows faster than traffic for six quarters, with no single team responsible. Why do cost-reduction sprints fail to hold, and what is the reframing that works?

    2 min answer finopsunit-economicsattributiongovernance
  8. Cost & FinOps intermediate

    Finance wants to cut cloud spend by committing to one-year and three-year reservations. What do you commit to, and what could go wrong?

    2 min answer finopscommitmentsreservationscost
  9. Cost & FinOps intermediate

    The cloud bill has tripled in six months while traffic grew 40%. How do you find out why, and what do you expect to find?

    2 min answer finopscostdiagnosisegress
  10. Cost Governance advanced

    A commerce platform must control cost while guaranteeing capacity for peak retail events. How should governance handle the tension?

    2 min answer cost-governancepeakexceptionsbudgets
  11. Cost Governance intermediate

    A team adopts an elastic analytical platform and receives a surprising invoice. What controls should have existed, and why do they get added late?

    2 min answer snowflakeelasticitygovernancequotas
  12. Cost Governance advanced

    At 02:14 on a Saturday a storage-triggered function starts writing its output back into the prefix that triggers it. By Monday 09:00 the account has logged 290 million invocations against a monthly forecast of about $700. The budget alert fired on Sunday at 18:40. Which design decisions made this possible?

    2 min answer cost-governanceserverlessguardrailsquotas