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2707 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 areas2707 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 Architecture96 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 Architecture98 Streaming & Real-Time Data93 Data Governance & Semantics91 Frontend & Experience Architecture91 Edge, Mobile & IoT88 Regulatory & Data Protection Architecture90 Assurance, Audit & Model Risk98
Difficulty Any beginner intermediate advanced

44 questions in Delivery & Release Engineering.

  1. Deployment Gates advanced Multiple choice

    Your edge platform propagates configuration changes to every location within seconds. Is that a strength or a risk?

    2 min answer cloudflareconfigurationblast-radiusstaging
  2. Deployment Strategies advanced

    A deployment reaches seven of eight servers. The eighth runs old code that a reused flag activates. Losses accumulate for 45 minutes. What are the findings?

    2 min answer knight-capitaldeploymentflagsverification
  3. Deployment Strategies advanced Multiple choice

    A food-delivery platform in the mould of Zomato rolls out a pricing change in nine steps over 90 minutes with a 10-minute bake between steps. Error rate, latency and saturation stay flat the whole time. The defect is a wrong rounding rule that under-charges some orders, and it surfaces the next morning when finance reconciliation runs. Which change makes this class of rollout safe?

    3 min answer zomatoprogressive-deliveryinvariantsbake-time
  4. Deployment Strategies advanced

    A platform must deploy a service holding millions of long-lived connections. Which deployment strategy applies, and what capability makes it work?

    1 min answer deploymentstatefuldrainingresumption
  5. Deployment Strategies advanced

    Your organisation releases every two weeks on a train. Teams complain about lead time. Is the train the problem?

    2 min answer releasecouplingflow
  6. Flow Metrics advanced

    Delivery leadership says releases are too slow and wants the engineering team to "move faster". Lead time from commit to production is 21 days. How do you investigate, and what do you expect to find?

    2 min answer flowdeliverylead-timequeues
  7. GitOps advanced

    During an incident an engineer edits a live Kubernetes resource and the change is reverted a minute later by the GitOps controller. The incident continues. What is your position?

    2 min answer gitopsincidentoperationsreconciliation
  8. GitOps advanced

    On 14 March 2023 a Kubernetes upgrade at Reddit caused an outage of about 314 minutes. The upgrade removed a node label that an internal network component had been selecting on, and that component's configuration had been hand-edited through a CLI and committed nowhere. Where do you start investigating, and what is the diagnosis?

    3 min answer redditgitopsundocumented-statekubernetes
  9. IaC Modules & Drift advanced

    One Terraform state file holds 4,000 resources across networking, databases, Kubernetes and DNS for production. A plan takes 14 minutes, every change risks unrelated resources, and four teams contend for the lock. You must split it into per-domain states without destroying anything. What is the sequence?

    4 min answer terraformstatemigrationblast-radius
  10. Multi-Region Rollout advanced

    A change must be rolled out across many regions. How should the sequence be designed, and what makes region-by-region rollout fail to provide the safety it appears to?

    2 min answer multi-regionrolloutblast-radiuscontrol-plane
  11. Multi-Region Rollout advanced

    A configuration or code change must reach many regions or edge locations. What rollout properties matter most?

    2 min answer rolloutstagingrollbackhealth-gates
  12. Multi-Region Rollout advanced

    A globally distributed platform must roll out a change across regions. What order and what controls?

    2 min answer fly-iorolloutregionshalt