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Quiz

2627 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 areas2627 Architecture Fundamentals81 Distributed Systems101 Data Architecture90 Cloud Architecture77 Networking86 API & Integration Architecture78 Reliability & Resilience88 Observability81 Performance & Capacity Engineering90 Security Architecture85 Cost Architecture & FinOps82 Business Architecture93 Architecture Communication91 Enterprise Architecture91 Legacy Modernization82 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

82 questions in Cost & FinOps.

  1. Cost per Request intermediate Multiple choice

    A marketplace's infrastructure spend rises with growth. How should it distinguish healthy growth from deteriorating efficiency?

    2 min answer meeshounit-economicscostefficiency
  2. Cost per Request advanced

    An inference platform's cost per request varies by two orders of magnitude between requests. What does that imply for pricing, capacity and engineering priorities?

    2 min answer cost-per-requestvariancepricingbatching
  3. Cost per Request advanced

    How do you build a cost-per-request model for a proposed architecture before writing code, and which cost terms are most often omitted?

    2 min answer prime-videocost-modellingunit-economicsdesign-review
  4. Cost per Request intermediate Multiple choice

    Your infrastructure bill rose 40% this quarter. What do you need to know before deciding whether that is a problem?

    2 min answer unit-economicscostefficiencymetrics
  5. Cost vs Reliability advanced

    A cost-sensitive platform must choose between a highly available architecture and a cheaper one with a wider failure domain. How should the decision be made?

    2 min answer physics-wallahcostreliabilityslo
  6. Cost vs Reliability advanced

    A team is asked to reduce infrastructure cost by 30%. How do you make the reliability trade-off explicit rather than accidental, and what should be cut first?

    2 min answer costreliabilityslotradeoff
  7. Cost vs Reliability advanced

    One architecture has excellent performance and mediocre reliability; another is reliable at substantially higher cost. How should the trade-off be evaluated?

    2 min answer cost-vs-reliabilitysloerror-budgetbusiness-impact
  8. Cost vs Reliability advanced

    To cut 45% from database spend a team moved the primary from a synchronous two-zone pair to a single zone, with snapshots every 30 minutes and log shipping every 5. The zone never fails. It gets slow - storage latency goes from 1 ms to 80 ms and stays there for two hours. What happens, minute by minute?

    3 min answer grey failureavailability zonesrpodetection
  9. Cost vs Reliability advanced

    What would it cost to move a service from 99.9% to 99.99% availability, and how would you decide whether it is worth it?

    2 min answer availabilitycostslotradeoffs
  10. Network & Egress Costs advanced

    A live-streaming platform's largest infrastructure line item is data transfer. What architectural levers reduce it, and which are unavailable?

    2 min answer egresscdnpeeringbitrate
  11. Network & Egress Costs advanced

    A microservice estate spread across three availability zones has a large unexplained network charge. Explain and fix.

    2 min answer networkingfinopsarchitecture
  12. Network & Egress Costs intermediate

    A social platform discovers that data egress is its largest single cost line. Which architectural changes reduce it most, and which are ineffective?

    2 min answer sharechategresscdncache-hit