Integrate an Application into a Prebuilt CD Environment Leveraging Docker and Kubernetes 350-901 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · medium

   A Kubernetes Deployment runs a web service. The container starts its HTTP server quickly, but the application needs to load a large configuration file from a remote service before it can serve traffic. Which probe configuration correctly distinguishes between a container that is starting up but not yet ready and a container that has crashed or deadlocked?

   • ASet a readinessProbe with an initialDelaySeconds of 30 and a livenessProbe with a longer initialDelaySeconds (e.g., 60) and a separate path that checks for a fatal condition. The readiness probe gates traffic until the app is ready; the liveness probe restarts the container only if it becomes unresponsive after startup.
   • BSet only a readinessProbe with an initialDelaySeconds of 30 and a periodSeconds of 5. No livenessProbe is needed because the readiness probe will eventually fail if the container is deadlocked.
   • CSet only a livenessProbe with an initialDelaySeconds of 30. The liveness probe will keep the container alive during startup and will also remove the pod from Service endpoints if it fails, so no readiness probe is required.
   • DSet a livenessProbe with an initialDelaySeconds of 30 and a readinessProbe with the same path and period. The liveness probe will restart the container if it is not ready within 30 seconds, and the readiness probe will remove the pod from Service endpoints until it is ready.
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2. 17foundation · easy

   Which `kubectl` command rolls back a Deployment to the previous revision?

   • Akubectl undo deployment/myapp
   • Bkubectl rollback deployment/myapp
   • Ckubectl rollout undo deployment/myapp
   • Dkubectl revert deployment/myapp
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4. 18expert · hard

   A team is rolling out a new version of a critical application. They want to ensure zero downtime and also be able to quickly roll back if the new version has issues. They have configured a rolling update with `maxUnavailable: 0` and `maxSurge: 1`. During the rollout, they notice that the new pod is crash-looping. What is the impact on the deployment, and what should they do?

   • AThe rollout will continue because the old pods are still running, and the new pod will eventually become ready
   • BThe rollout will fail immediately, and the Deployment will be deleted
   • CThe rollout will continue, but the new pod will be terminated and recreated until it becomes ready
   • DThe rollout will be paused because the new pod is not ready, and the old pods remain available; they should run `kubectl rollout undo` to roll back
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5. 19foundation · easy

   In a Dockerfile, which instruction is used to specify the base image for the build?

   • ACMD
   • BCOPY
   • CFROM
   • DRUN
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6. 20foundation · easy

   Which `kubectl` command applies a configuration change to a Kubernetes cluster from a YAML file?

   • Akubectl run -f deployment.yaml
   • Bkubectl apply -f deployment.yaml
   • Ckubectl create -f deployment.yaml
   • Dkubectl update -f deployment.yaml
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