1. Container Image Strategy intermediate

    A platform must define a container image strategy for many teams. What decisions matter, and what is the security constraint?

    2 min answer imagesbase-imagespatchingprovenance
  2. Container Image Strategy beginner Multiple choice

    An inference service's container image is 6.2 GB because the model weights sit in the final layer. Autoscaling adds twelve fresh nodes at peak; the new pods stay NotReady for several minutes and other pods scheduled onto the same nodes wait behind them. What is happening and which change helps most?

    3 min answer container imagesimage pullcold startautoscaling
  3. Container Image Strategy intermediate Multiple choice

    At 11:40 a node group scales from 40 to 120 nodes during a traffic spike. The new pods sit in ImagePullBackOff - the public registry is returning 429 for the unauthenticated pulls of base images that three of your images reference directly. Which change removes this failure mode?

    3 min answer container imagesregistryscale-outavailability
  4. Containers advanced

    A developer platform receives thousands of simultaneous builds after a popular framework release. How should build queues, worker pools, priority scheduling, concurrency limits, caching and backpressure prevent capacity collapse?

    2 min answer railwayrenderbuildsqueueing
  5. Containers advanced

    A developer-tools company runs enormous numbers of short-lived build and test containers where startup time dominates total runtime. Which container strategy decisions matter most?

    2 min answer containersimagesbuild-systemscaching
  6. Containers advanced

    An organisation with eight services and four engineers proposes adopting Kubernetes. Make the case against, then name what would change your mind.

    2 min answer kubernetescontainersgoogleover-engineering
  7. Context Diagrams beginner

    A 40-engineer SaaS product has a context diagram with six external systems on it. Roughly how many outbound dependencies does a product that size actually have, how would you count them without guessing, and what does the real number change?

    3 min answer context diagramdependenciesinventoryvendors
  8. Context Diagrams beginner Multiple choice

    A team draws their payment provider inside the system boundary on their context diagram because the provider's SDK runs inside their own service. During the first incident the on-call engineer spends 20 minutes trying to restart something the team does not own. What does the boundary line on a context diagram actually mean?

    3 min answer context-diagramsystem-boundarydependenciesincident-response
  9. Context Diagrams intermediate

    What belongs on a context diagram that most teams leave off?

    2 min answer context-diagramdependenciesfailure-behaviourscope
  10. Context Diagrams beginner

    Why is the system context diagram usually the most valuable single diagram, and what is most often left off it?

    2 min answer context-diagramscopedependenciestwilio
  11. Continuous Controls Monitoring intermediate Multiple choice

    An annual audit tests a control by sampling 25 changes from the 10,000 made that year. Suppose 5% of changes actually violate the control. Roughly what is the probability that the sample contains at least one violation?

    2 min answer samplingassurancedetectioncontinuous-controls
  12. Continuous Controls Monitoring advanced

    An organisation is audited annually against controls that are tested by sampling. How should continuous controls monitoring be architected, and what changes about the assurance itself?

    2 min answer complianceautomationevidenceaudit