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Quiz

2667 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 areas2667 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 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

92 questions in Legacy Modernization.

  1. Strangler Fig advanced

    A legacy scheduling system must be replaced incrementally. How should a strangler approach, traffic shadowing, dual-run comparison and rollback be sequenced, and what reconciliation is required?

    3 min answer stranglershadow-trafficdual-runreconciliation
  2. Strangler Fig advanced

    A strangler migration is 70% complete and has stalled. The legacy system still runs. What happened and what do you do?

    2 min answer modernizationprogrammedecommissioning
  3. Strangler Fig advanced

    A wallet platform must migrate from a monolith to services while serving live traffic. What sequence minimises risk, and which step is usually done in the wrong order?

    2 min answer mobikwikstranglermigrationsequencing
  4. Strangler Fig advanced

    You are modernising a fifteen-year-old monolith with the strangler pattern. Which slice do you extract first, and why?

    2 min answer modernizationstranglermigrationsequencing
  5. Zero-Downtime Migration intermediate Multiple choice

    A commerce platform must change a database schema while an older application version is still running. What migration pattern prevents downtime, and what is the common mistake?

    2 min answer myntraschema-migrationexpand-contractdeployment
  6. Zero-Downtime Migration advanced Multiple choice

    A hot table needs a column renamed and retyped, across many running instances. What constraint dictates the whole sequence?

    2 min answer expand-contractrolling-deploymentreversibilityverification
  7. Zero-Downtime Migration advanced

    A large sharded MySQL fleet needs a tenant moved between shards with no downtime. How should online data movement, dual writes, cutover and rollback be sequenced?

    2 min answer vitessplanetscaleshardingmigration
  8. Zero-Downtime Migration advanced

    A platform deploying many times a day must change a column type on a very large table with no maintenance window. Walk through the sequence.

    2 min answer zero-downtimeexpand-contractbackfillschema