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2908 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 areas2908 Architecture Fundamentals91 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture87 Reliability & Resilience99 Observability92 Performance & Capacity Engineering100 Security Architecture95 Cost Architecture & FinOps102 Business Architecture103 Architecture Communication102 Enterprise Architecture100 Legacy Modernization92 AI-Era Architecture96 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

5 questions in NoSQL Stores.

  1. NoSQL Stores advanced

    A chat platform stores billions of messages in a wide-column database and hits severe tail-latency problems on hot partitions during large-community activity. Analyse why the storage choice is right but the partitioning is wrong, and what the fix looks like.

    2 min answer nosqlwide-columnpartitioningtail-latency
  2. NoSQL Stores advanced

    A professional network computes "people you may know" from the connection graph. Some accounts have hundreds of thousands of connections. What breaks?

    2 min answer linkedingraphskewtraversal
  3. NoSQL Stores intermediate

    A team needs a store for derived data that is bulk-loaded from offline jobs, updated in real time, and read at very low latency. Why does this workload get its own system rather than reusing the primary online database?

    2 min answer airbnbmusselderived-datakey-value
  4. NoSQL Stores intermediate Multiple choice

    A team proposes replacing PostgreSQL with a document store because "it scales better". Current load is 800 writes per second. What is your response?

    2 min answer nosqlrelationalamazondynamo
  5. NoSQL Stores intermediate

    A team wants to move a workload from PostgreSQL to a document store because "the schema keeps changing". What do you ask?

    2 min answer nosqlschemamigrationdecision-making