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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

92 questions in Cost & FinOps.

  1. Unit Economics intermediate

    A delivery marketplace's infrastructure cost per order is falling while total cost rises. Is that good, and what should the unit metric actually be?

    2 min answer unit-economicsmetricsmarketplacescaling
  2. Unit Economics advanced Multiple choice

    A travel marketplace in the mould of Expedia serves roughly 1000 searches per confirmed booking. Every search fans out to supplier APIs that charge per call and enforce contractual call quotas. Infrastructure cost per booking is climbing while cost per search falls. Which unit metric should drive architectural decisions?

    2 min answer expediaunit-economicsfunnelsupplier-apis
  3. Unit Economics advanced

    An AI inference platform's margin depends on GPU utilisation. Which levers actually change unit economics, and in what order?

    2 min answer replicatetogether-aigpuutilisation
  4. Unit Economics intermediate

    An interviewer sets the exercise on a food-delivery platform of Zomato's kind - assume a flat delivery fee of $2.00 and a 70% gross-margin target on that fee. Work backwards to the infrastructure budget per order and then tell me what you would do with the number.

    2 min answer unit-economicsmarginbudgetsthresholds
  5. Waste Elimination beginner Multiple choice

    A cleanup deletes 2000 orphaned volume snapshots whose reported sizes total 60 TB. On the next full invoice the snapshot line falls by about 5%. The snapshots really are gone and billing has caught up. Where is the saving?

    2 min answer wastesnapshotsbackupsstorage
  6. Waste Elimination intermediate

    A platform wants to eliminate infrastructure waste. What are the highest-return categories, and which apparent waste should be left alone?

    2 min answer wastereclamationheadroomautomation
  7. Waste Elimination intermediate

    A platform's infrastructure is over-provisioned but nobody can say by how much. What is the systematic approach to finding and removing waste?

    2 min answer modalrightsizingwasteutilisation
  8. Waste Elimination intermediate

    How would you identify workloads that are running and serving no purpose, and how would you make removing them safe?

    2 min answer wastezombiesorphansownership