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2988 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 areas2988 Architecture Fundamentals91 Distributed Systems111 Data Architecture100 Cloud Architecture97 Networking96 API & Integration Architecture97 Reliability & Resilience99 Observability92 Performance & Capacity Engineering100 Security Architecture105 Cost Architecture & FinOps102 Business Architecture103 Architecture Communication102 Enterprise Architecture100 Legacy Modernization102 AI-Era Architecture106 Software Architecture & Engineering93 Architecture Patterns94 Architecture Decision-Making101 The Architect's Meta-Skills102 Delivery & Release Engineering103 Platform Engineering & Developer Experience102 Testing & Quality Architecture102 Data Platform Architecture98 Streaming & Real-Time Data103 Data Governance & Semantics91 Frontend & Experience Architecture101 Edge, Mobile & IoT98 Regulatory & Data Protection Architecture99 Assurance, Audit & Model Risk98
Difficulty Any beginner intermediate advanced

3 questions in Application Performance Monitoring.

  1. Application Performance Monitoring advanced

    At 09:07 UTC a CDN route recovers and a queued asset is released. Within seconds the API gateway sees roughly 1.5 million requests per second, about three times its normal peak. Gateway tasks start failing health checks and being replaced, though CPU never saturates and the upstream services look healthy. Canva published this incident for 12 November 2024. Where is the time going, and what do you look at first?

    4 min answer canvaapminstrumentation overheadthundering herd
  2. Application Performance Monitoring advanced

    In a multi-tenant platform, aggregate application performance metrics look healthy while specific tenants experience severe slowness. What must performance monitoring do differently?

    2 min answer apmmulti-tenancysegmentationoutliers
  3. Application Performance Monitoring advanced

    Review this instrumentation. A checkout service emits about 400 spans per request, every span carries roughly 30 attributes including the full request body, tracing runs at 100% with no sampling, and the team reports that they cannot find anything in the traces. What would you remove, what would you change, and what would you keep even though it looks excessive?

    3 min answer tracingapminstrumentationsampling