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 Rehosting.

  1. 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
  2. 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
  3. Rehosting intermediate Multiple choice

    A nightly billing batch that ran in 4 hours 10 minutes on a 2016 on-premises server takes 9 hours 20 minutes after a lift-and-shift onto a cloud instance with twice the vCPUs and four times the memory. CPU sits near 12 percent across all cores and the instance is never network-throttled. Where is the time going?

    3 min answer rehostlift-and-shiftbatch-windowsingle-thread
  4. 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
  5. Rehosting intermediate

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

    2 min answer rehostmigrationcostreplatform