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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

22 questions in Streaming & Real-Time Data.

  1. Streaming Cost intermediate Multiple choice

    A topic ingests 200 MB per second, replication factor 3, retained 30 days. Producers and consumers are spread across 3 availability zones with no rack awareness in the consumers. Roughly what does the storage footprint come to?

    3 min answer kafkacostretentionreplication
  2. Streaming Joins intermediate

    A job enriches order events with customer tier by looking up a table built from a compacted topic. After a routine deploy, 3% of orders in the first ten minutes come out with tier null, then the rate returns to zero. Throughput and error rate are flat. What is happening?

    2 min answer streaming joinsbootstrapraceenrichment
  3. Streaming Schema Evolution intermediate

    A team needs to change the schema of an event that many consumers read. What is the safe process?

    2 min answer sharechatschemacompatibilityregistry
  4. Streaming SLOs intermediate

    Consumer lag has grown from 30 seconds to 4 minutes over a week. Throughput and error rates are normal. What is happening and how urgent is it?

    2 min answer streamingoperationscapacity
  5. Streaming SLOs intermediate

    What SLOs should a streaming pipeline publish, and why is availability the wrong headline metric?

    2 min answer streaming-sloslagcompletenessfreshness
  6. Streaming SLOs intermediate

    You are handing a streaming pipeline to an operations team who have never run one. What must exist before they accept it?

    2 min answer streamingoperationshandoverrunbooks
  7. Streaming vs Batch intermediate

    A product manager asks for a "real-time" dashboard. How do you turn that into a design decision?

    2 min answer requirementslatencycost
  8. Streaming vs Batch intermediate

    A quick-commerce platform must decide whether a data flow should be streaming or batch. What actually decides it?

    2 min answer zeptostreamingbatchlatency
  9. Streaming vs Batch intermediate

    Which parts of a grocery platform's data processing genuinely require streaming, and which are better as batch?

    1 min answer streamingbatchfreshnesscost
  10. Windowing intermediate

    A live dashboard's "views in the last 30 minutes" reads about 30 times the true number. The job emits a 30-minute window advancing every minute; individual window values look correct when spot-checked; the sink is a time-series table and the panel sums the rows in the selected range. Lag and CPU are normal. What is happening and what do you change?

    3 min answer windowinghopping windowsdouble countingsinks