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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. Business KPIs advanced

    How would you justify a six-week reliability investment to a commercial stakeholder?

    2 min answer business-casekpiscommunicationoutcomes
  2. Business KPIs advanced

    Instacart's 2023 S-1 reported 2022 revenue of $2,551M, split $1,811M transaction and $740M advertising and other. You are the architect for the ad-serving path inside the shopping app. The interviewer asks which business KPI your next six months of work moves, and how you would prove it moved. Talk me through your answer.

    3 min answer instacartkpisattributionadvertising
  3. Business Metrics intermediate

    A marketplace's technical dashboards are all green during a checkout failure that costs significant revenue. What kind of monitoring was missing?

    2 min answer meeshobusiness-metricsdetectionfunnels
  4. Business Metrics intermediate

    A marketplace's technical metrics are all healthy during an incident in which sellers cannot list items. Why did technical monitoring miss it, and what should be measured?

    2 min answer business-metricsdetectionsilent-failureetsy
  5. Business Metrics intermediate

    Booking.com has stated repeatedly that it runs well over a thousand concurrent A/B experiments on an in-house platform. An experiment ships, every engineering dashboard stays green — latency flat, error rate flat, saturation fine — and bookings for one market fall 4% for eleven days before anyone connects the two. What was missing, and how would you design the metric layer so this is caught in hours?

    4 min answer booking.comexperimentationguardrail metricsbusiness metrics
  6. Business Metrics advanced

    Customers reported an outage 40 minutes before your monitoring did. How do you close that gap?

    2 min answer detectionbusiness-metricssyntheticsclient-side
  7. Business Processes intermediate Multiple choice

    A food-delivery platform handles 220,000 orders a day. About 1.8% of orders raise a refund dispute. Automated rules settle most of them but 22% reach a human agent who spends roughly 9 minutes per case. A fully loaded agent costs about £38,000 a year and delivers about 1,500 productive hours. Roughly what does the manual tail cost per year?

    3 min answer process-automationestimationunit-economicsexception-handling
  8. Business Processes intermediate

    A manual onboarding process handles about 400 cases a month. Automation covers the standard path, and after six months roughly 20% of cases still go to a person because each has some exception. The team proposes automating the remaining exceptions. How should this be sequenced?

    2 min answer process automationexceptionslong tailoperations
  9. Business Processes intermediate

    A process takes eleven days end to end and involves four hours of actual work. What does that tell you and where do you look?

    2 min answer processflowhandoffswait-states
  10. Business Processes advanced Multiple choice

    A travel platform's booking process spans six systems and takes days to change. Where should the process logic live, and what is the trade-off?

    2 min answer business-processorchestrationworkflowcoupling
  11. Business Understanding advanced

    A food-delivery marketplace takes a 12% commission on an average order of 400 rupees, and its contribution after paying delivery partners and payment fees is about 15 rupees per order. The platform team proposes a design that costs 3 rupees per order in infrastructure. Is that acceptable, and what does the answer change about the architecture?

    3 min answer unit-economicscost-per-requestmarginfinops
  12. Business Understanding intermediate

    How does knowing a company's business model change your architectural choices?

    2 min answer businessprioritiestradeoffscontext