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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

42 questions in Cost & FinOps.

  1. Total Cost of Ownership intermediate

    A team proposes self-hosting a managed service to save £80000 a year in licence fees. What do you add to their calculation?

    2 min answer tcobuild-vs-buypeople-costopportunity-cost
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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