Portfolio ↗

Quiz

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

5 questions in Single vs Multi-Region.

  1. Single vs Multi-Region advanced

    A B2B scheduling platform runs in one US region. 38% of revenue now comes from Australia and Europe, where p95 page load is 1.9 s against 420 ms in North America, and churn in those markets runs 2.3x the US rate. The team chooses one home region per tenant with a full stack in each, not global replication. Give the sequence under live traffic, say where data can diverge, and name the point of no return.

    3 min answer multi-regiontenant-pinningcutoverdual-write
  2. Single vs Multi-Region advanced

    A collaborative product must decide between single-region, multi-region read replicas, and multi-region writable. What should decide it?

    2 min answer multi-regionlatencycomplexitylocal-first
  3. Single vs Multi-Region beginner

    A single-region service already runs across three availability zones. After a four-hour incident at a cloud provider in a neighbouring region, the board asks for a second region. The team's own two-year incident log reads: eleven incidents, nine caused by its own deploys or configuration changes, two by the loss of a single zone. What does a second region add that a third zone does not, and what does that log say about the request?

    3 min answer multi-regionavailability-zonesfailure-domainsincident-history
  4. Single vs Multi-Region advanced

    A stakeholder asks for multi-region. What three questions do you ask before agreeing?

    2 min answer multi-regionresidencylatencyavailability
  5. Single vs Multi-Region advanced

    A team must decide whether to run in one region or several. What evidence justifies multi-region, and what does it cost?

    2 min answer flyiomulti-regionlatencyavailability