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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

6 questions in Migration Risk.

  1. Migration Risk advanced

    A logistics platform is migrating a system that coordinates live vehicle dispatch. What controls reduce migration risk when the operation cannot pause?

    2 min answer portermigration-riskprogressiveshadowing
  2. Migration Risk advanced

    A platform is migrating a live service and must manage risk. Which risks dominate, and which controls actually reduce them?

    2 min answer migration-riskblast-radiusrollbackverification
  3. Migration Risk advanced

    Ant Group moved Alipay's core transaction data off a commercial relational database onto OceanBase, its own distributed database, beginning with a 1% slice in 2014 and reaching full replacement in 2019. What risk control is that ramp actually providing, and where would copying it be a mistake?

    3 min answer alibabaoceanbasealipayincremental-migration
  4. Migration Risk intermediate

    Review this migration plan. Cutover is staged by customer cohort at 2 percent then 10 then 50 then 100. Readiness for each step is "all automated tests green and no open P1 defects". The rehearsal ran against a 5 percent copy of production. The rollback step reads "restore from the pre-cutover snapshot if data integrity is compromised". What would you remove, what would you change, and what would you leave alone?

    3 min answer migration-riskcutoverabort-criteriarehearsal
  5. Migration Risk intermediate Multiple choice

    What is the single most important risk control in a migration, and why?

    2 min answer migration-riskreversibilityverificationblast-radius
  6. Migration Risk intermediate

    You want to replace a twelve-year-old monolith one capability at a time. The organisation releases that monolith once every six weeks on a Thursday evening, behind a change advisory board that meets fortnightly. Tell me what you would do first and why.

    3 min answer etsydeployment cadencestranglerchange advisory