A pod named batch-job is in CrashLoopBackOff. You have run kubectl logs batch-job --previous and it shows an error about a missing environment variable. You fix the environment variable in the Deployment and the pod restarts, but it still crashes with the same error. You suspect the pod is using a cached image. Which command would help you confirm whether the new environment variable is actually being applied?

kubectl logs batch-job --previous

kubectl get events --field-selector involvedObject.name=batch-job

kubectl exec -it batch-job -- env

A pod named api-5g6h7j8k3 is running slowly and you suspect it is using more CPU than expected. You want to see the current CPU and memory usage of the pod and compare it with the logs to identify any correlation. Which two commands would you use together?

kubectl describe pod api-5g6h7j8k3 and kubectl get events

kubectl exec -it api-5g6h7j8k3 -- top and kubectl logs api-5g6h7j8k3

kubectl top pod api-5g6h7j8k3 and kubectl logs api-5g6h7j8k3

kubectl port-forward api-5g6h7j8k3 8080:8080 and kubectl logs api-5g6h7j8k3

You want to copy a log file from a pod to your local machine for further analysis. Which command would you use?

kubectl cp :/var/log/app.log ./app.log

kubectl exec -- cat /var/log/app.log

kubectl get pod -o yaml > app.log

A pod named cache-0 is running but is not behaving as expected. The container image does not include a shell or any debugging tools. You need to inspect the pod's network namespace and run diagnostic commands without modifying the running container. Which approach should you take?

kubectl logs cache-0 --previous

kubectl cp /tmp/tools cache-0:/tmp/tools

kubectl exec -it cache-0 -- /bin/sh

kubectl debug cache-0 -it --image=nicolaka/netshoot --target=cache-0

Certified Kubernetes Application Developer (CKAD)

Domain 3Objective 4

Debugging in Kubernetes CKAD Practice Questions (Page 5)

Part of the Application Observability and Maintenance domain, which accounts for 15% of the CKAD exam. Linux Foundation does not publish an official question count, but from its 120-minute exam (~50–80 total, ~8–12 in this domain), expect 2–3 from this objective — we provide 28 practice questions to prepare you well beyond it. (estimate)

28questions here

6free pages

8concepts

15%of the exam

Questions 21–25

21expert · hard
A pod named batch-job is in CrashLoopBackOff. You have run kubectl logs batch-job --previous and it shows an error about a missing environment variable. You fix the environment variable in the Deployment and the pod restarts, but it still crashes with the same error. You suspect the pod is using a cached image. Which command would help you confirm whether the new environment variable is actually being applied?
Select an answer first
22application · medium
A pod named api-5g6h7j8k3 is running slowly and you suspect it is using more CPU than expected. You want to see the current CPU and memory usage of the pod and compare it with the logs to identify any correlation. Which two commands would you use together?
Select an answer first
23foundation · easy
You want to copy a log file from a pod to your local machine for further analysis. Which command would you use?
Select an answer first
24application · medium
A pod named cache-0 is running but is not behaving as expected. The container image does not include a shell or any debugging tools. You need to inspect the pod's network namespace and run diagnostic commands without modifying the running container. Which approach should you take?
Select an answer first
25foundation · easy
You want to run a single command (not interactive) inside a container to check its environment variables. Which command would you use?
Select an answer first

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Debugging in Kubernetes CKAD Practice Questions (Page 5)

Questions 21–25

A pod named api-5g6h7j8k3 is running slowly and you suspect it is using more CPU than expected. You want to see the current CPU and memory usage of the pod and compare it with the logs to identify any correlation. Which two commands would you use together?

You want to copy a log file from a pod to your local machine for further analysis. Which command would you use?

A pod named cache-0 is running but is not behaving as expected. The container image does not include a shell or any debugging tools. You need to inspect the pod's network namespace and run diagnostic commands without modifying the running container. Which approach should you take?

You want to run a single command (not interactive) inside a container to check its environment variables. Which command would you use?

Keep studying — Application Observability and Maintenance