CKAD Dump 4

Question 1

Which field in a CronJob spec controls how many successful job completions are retained?

Accepted Answer

spec.successfulJobsHistoryLimit

Answer

successfulJobsHistoryLimit specifies how many completed Job objects are kept; default is 3.

Question 2

You want to prevent pods in namespace 'dev' from communicating with pods in namespace 'prod'. Which resource do you use?

Accepted Answer

NetworkPolicy

Answer

NetworkPolicy controls ingress and egress traffic between pods using label selectors and namespace selectors.

Question 3

What does the command 'kubectl rollout undo deployment/web' do?

Accepted Answer

Rolls back to the previous revision

Answer

kubectl rollout undo reverts the deployment to its previous revision by updating the pod template.

Question 4

Which volume type is best for sharing data between containers in the same pod during the pod's lifetime?

Accepted Answer

emptyDir

Answer

emptyDir is created when the pod starts and lives as long as the pod, making it ideal for inter-container sharing.

Question 5

How do you expose port 8080 of a pod named 'myapp' as a ClusterIP Service named 'myapp-svc' imperatively?

Accepted Answer

kubectl expose pod myapp --port=80 --target-port=8080 --name=myapp-svc

Answer

kubectl expose pod creates a Service targeting the specified pod port and exposes it on the given port.

CKAD - Certified Kubernetes Application Developer Practice Test