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Quiz

2627 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 areas2627 Architecture Fundamentals81 Distributed Systems101 Data Architecture90 Cloud Architecture77 Networking86 API & Integration Architecture78 Reliability & Resilience88 Observability81 Performance & Capacity Engineering90 Security Architecture85 Cost Architecture & FinOps82 Business Architecture93 Architecture Communication91 Enterprise Architecture91 Legacy Modernization82 AI-Era Architecture86 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 Architecture88 Streaming & Real-Time Data93 Data Governance & Semantics81 Frontend & Experience Architecture91 Edge, Mobile & IoT88 Regulatory & Data Protection Architecture90 Assurance, Audit & Model Risk88
Difficulty Any beginner intermediate advanced

26 questions in Legacy Modernization.

  1. Modernisation Business Case intermediate

    A modernisation programme cannot get funded because its benefits are technical. How should the case be made?

    2 min answer gustobusiness-casefundingevidence
  2. Modernisation Business Case intermediate

    An architect must justify continued investment in a modernisation programme after eighteen months with the end state not yet reached. What should the argument be?

    2 min answer business-caseincremental-valueevidencesponsorship
  3. Parallel Run intermediate

    An enterprise runs old and new systems in parallel to validate the replacement. What makes a parallel run effective, and what makes it expensive theatre?

    2 min answer parallel-runverificationcomparisoncutover
  4. Rebuild vs Re-architect intermediate

    Review this plan. Eighteen months to rebuild the policy engine. Feature parity is required before any traffic moves. The legacy team is frozen to bug fixes only so that no effort is wasted on code that will be thrown away. What would you remove, what would you change, and what would you leave alone?

    3 min answer rewritefeature-parityarchitecture-reviewincremental-migration
  5. Rehosting intermediate Multiple choice

    A data-centre exit must move about 600 virtual machines in nine months. The first wave moved 40 machines chosen because they were the least busy and three business applications became unusably slow overnight. What should decide which machines travel in the same wave?

    3 min answer rehostdata centre exitmove groupslatency
  6. Rehosting intermediate Multiple choice

    A data-centre lease expires in eleven months and will not be renewed. The team plans to rehost about 300 virtual machines with no application changes. Which benefit is the one rehosting reliably delivers and therefore the one the plan should be justified on?

    2 min answer rehostlift-and-shiftbusiness-casecost
  7. Rehosting intermediate

    An organisation rehosts its estate to cloud infrastructure and finds costs higher and reliability no better. What did rehosting not deliver, and what should follow?

    2 min answer rehostlift-and-shiftcostcloud
  8. Rehosting intermediate

    When is lift-and-shift the right migration strategy, and what must be planned alongside it?

    2 min answer rehostmigrationcostreplatform
  9. Replatforming intermediate

    A marketplace replatforms a service from a self-managed database to a managed one. What benefits are real, what constraints appear, and what must be verified first?

    2 min answer replatformmanaged-servicesconstraintsmigration
  10. Replatforming intermediate

    A team replatforms a self-managed database onto a managed service in six weeks and the project lands on time. Eighteen months later they are running an unplanned major-version upgrade over a weekend because the provider's standard support for their engine version ends. What did the replatform actually trade away, and when does that bill arrive?

    3 min answer replatformmanaged servicesupgradesend of support
  11. The Six Rs intermediate

    A company must modernise a portfolio of applications. How should each be assigned a modernisation approach, and what is the most common misassignment?

    2 min answer udaansix-rsportfoliorehost
  12. The Six Rs intermediate

    A travel platform must move a portfolio of applications off ageing infrastructure. How should each application be assigned among rehost, replatform, refactor, rebuild, replace and retire?

    2 min answer six-rsportfoliomigration-strategyexpedia