1. Landing Zones advanced

    A large enterprise is starting a cloud programme across dozens of business units with different regulatory obligations. What must the landing zone establish before the first workload, and what is the cost of getting it wrong?

    2 min answer landing-zonesgovernanceenterpriseguardrails
  2. Landing Zones advanced

    An organisation has 200 cloud accounts created ad hoc, with overlapping IP ranges and no consistent controls. Where do you start?

    2 min answer cloudgovernanceremediation
  3. Landing Zones advanced

    An organisation is starting cloud adoption. Three teams want to deploy next month. What must exist first, and what can wait?

    2 min answer landing-zonegovernancesequencing
  4. Managed Services advanced

    A team wants to self-manage Kafka on Kubernetes to save money against the managed service. Evaluate.

    2 min answer managed-servicestcooperations
  5. Multi-Cloud advanced

    A payments company moves to serving live traffic from two cloud providers at once so that no single provider outage can stop payments. Twelve months later measured availability is lower than it was on one provider and there has been no provider outage. What did they buy and what did they pay?

    3 min answer multi-cloudavailability-mathentity-homingfailover
  6. Multi-Cloud advanced

    An AI company needs enormous accelerator capacity that no single provider can supply on the timeline required. Is this a valid reason for multi-cloud, and what does it cost compared with the usual multi-cloud justifications?

    2 min answer multi-cloudcapacitygpulock-in
  7. Multi-Cloud advanced

    An organisation proposes a multi-cloud architecture for resilience. What evidence would justify it, and what does it actually cost?

    2 min answer druvamulti-cloudresilienceportability
  8. Multi-Cloud advanced

    Review this. A 40-engineer company runs on one provider but has banned managed services for portability - self-hosted Postgres and Kafka on Kubernetes, an S3-compatible object store on block volumes, and an in-house wrapper over two infrastructure-as-code providers. The claim is that it could move in a quarter. It has never run anything in a second provider. What would you remove, what would you change, and what would you leave alone?

    3 min answer multi-cloudlock-inmanaged-servicesarchitecture-review
  9. Multi-Cloud advanced

    The board mandates multi-cloud to avoid lock-in. What do you present back?

    2 min answer strategylock-incost
  10. Multi-Region Architecture advanced

    A collaborative design tool has users in one document spread across continents, needing sub-100 ms feedback on every edit. Should the document's authoritative state be multi-region writable, single-region, or something else?

    2 min answer multi-regionlatencycollaborationfigma
  11. Multi-Region Architecture advanced

    A global retailer wants a single product catalogue with sub-100ms writes from anywhere and strong consistency. Assess.

    2 min answer multi-regionconsistencylatencyphysics
  12. Multi-Region Architecture advanced

    A globally distributed application routes users to nearby regions but holds state that cannot safely be duplicated. Which components should be regional, which globally replicated, and which operations should stop during a regional outage?

    2 min answer flyiomulti-regionstatereplication