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2948 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 areas2948 Architecture Fundamentals91 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking96 API & Integration Architecture87 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

6 questions in Records Retention & Legal Hold.

  1. Records Retention & Legal Hold beginner

    A policy says customer records are deleted seven years after the relationship ends. A team implements it literally and still fails the audit. What actually starts the clock, and what does that force into the design?

    2 min answer retentiondeletionobject-lockcrypto-shredding
  2. Records Retention & Legal Hold advanced

    A regulated fintech must prove every customer-facing balance can be reconstructed from an audit trail. Compare event sourcing, CDC into an immutable log, and conventional tables with a triggered audit log.

    3 min answer nubankevent-sourcingcdcaudit
  3. Records Retention & Legal Hold advanced

    Litigation requires preserving all records relating to a matter, overriding normal retention. How is that implemented?

    2 min answer legal-holdretentionpreservationdiscovery
  4. Records Retention & Legal Hold intermediate

    Litigation requires preserving every record relating to one counterparty, overriding a retention policy that deletes after seven years. The data sits in a 400 TB object-store data lake, roughly 60,000 Parquet files, and the relevant rows are perhaps 3% of them spread across most files. Estimate the cost of implementing the hold, and say what you would do.

    3 min answer legal-holdobject-storagetable-formatsretention
  5. Records Retention & Legal Hold advanced

    On 27 September 2022 the SEC and CFTC announced settlements with 15 broker-dealers and one investment adviser totalling over $1.1bn, with individual SEC penalties ranging from $10M to $125M, for failing to preserve business communications conducted on personal messaging apps. What was the architectural failure, and what does it teach about capture obligations generally?

    3 min answer secrecordkeepingcaptureretention
  6. Records Retention & Legal Hold advanced

    Your automated retention job deletes records after seven years. Legal informs you that litigation is anticipated involving accounts from nine years ago. What now?

    2 min answer legal-holdretentionarchitecture