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Quiz

2707 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 areas2707 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 Architecture96 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 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

4 questions in Data Observability.

  1. Data Observability intermediate

    A dashboard has shown the same numbers for eleven days. The pipeline reports success every night. What monitoring was missing?

    2 min answer monitoringqualityfreshness
  2. Data Observability intermediate

    A dashboard was wrong for three weeks before anyone noticed. What monitoring would have caught it?

    2 min answer nykaadata-observabilityfreshnessanomaly
  3. Data Observability intermediate Multiple choice

    A grocery marketplace of the kind Instacart operates ingests retailer inventory feeds hourly and deduplicates on store id plus SKU. A retailer changes its SKU format and about 3% of distinct products now collide, so rows silently merge. Ingested row counts fall 3%, inside the 20% anomaly band. Schema tests pass and availability on the storefront quietly degrades. Which single check catches this?

    3 min answer instacartdata-observabilityreconciliationsilent-failure
  4. Data Observability intermediate

    A quarterly board report shows a category down 40%. Investigation finds an upstream system stopped sending a field three months ago. Nothing alerted. What do you change?

    2 min answer observabilityqualitycontractsincidents