A pod named worker-1 is running but is not responding to requests. The container image is minimal and does not include curl or wget. You need to test network connectivity from the pod's network namespace to an external service. Which command should you use?

kubectl exec -it worker-1 -- curl http://example.com

kubectl port-forward worker-1 8080:8080

kubectl logs worker-1 --tail=20

kubectl debug worker-1 -it --image=nicolaka/netshoot --target=worker-1

A pod named db-0 is running but the application inside is not responding to network requests as expected. You suspect a configuration file inside the container is incorrect. Which command allows you to inspect the file system of the running container?

kubectl port-forward db-0 5432:5432

kubectl get events --field-selector involvedObject.name=db-0

kubectl exec -it db-0 -- cat /etc/config/app.conf

A pod named frontend-6d8e9f0a1 is in ImagePullBackOff. You need to determine why the image cannot be pulled. Which command would you run first?

kubectl top pod frontend-6d8e9f0a1

kubectl describe pod frontend-6d8e9f0a1

kubectl logs frontend-6d8e9f0a1

kubectl exec -it frontend-6d8e9f0a1 -- /bin/sh

An application in a pod named app-2f4g7h8j1 is writing logs to a file at /var/log/app.log inside the container. You need to examine this file on your local machine to analyze the logs. Which command should you use?

kubectl cp app-2f4g7h8j1:/var/log/app.log ./app.log

kubectl port-forward app-2f4g7h8j1 8080:8080

kubectl exec -it app-2f4g7h8j1 -- cat /var/log/app.log

kubectl logs app-2f4g7h8j1 --tail=100

What is the purpose of an ephemeral container added with `kubectl debug`?

To run a temporary container in a pod for troubleshooting without affecting the original container

To replace the original container with a new one

To permanently add a sidecar container to the pod

To scale the pod to multiple replicas

Certified Kubernetes Application Developer (CKAD)

Domain 3Objective 4

Debugging in Kubernetes CKAD Practice Questions (Page 4)

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 16–20

16application · medium
A pod named worker-1 is running but is not responding to requests. The container image is minimal and does not include curl or wget. You need to test network connectivity from the pod's network namespace to an external service. Which command should you use?
Select an answer first
17application · medium
A pod named db-0 is running but the application inside is not responding to network requests as expected. You suspect a configuration file inside the container is incorrect. Which command allows you to inspect the file system of the running container?
Select an answer first
18application · medium
A pod named frontend-6d8e9f0a1 is in ImagePullBackOff. You need to determine why the image cannot be pulled. Which command would you run first?
Select an answer first
19application · medium
An application in a pod named app-2f4g7h8j1 is writing logs to a file at /var/log/app.log inside the container. You need to examine this file on your local machine to analyze the logs. Which command should you use?
Select an answer first
20foundation · easy
What is the purpose of an ephemeral container added with `kubectl debug`?
Select an answer first

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