CKA Troubleshooting

Question 1

How do you view logs for a specific container named 'nginx' in a multi-container pod named 'mypod'?

Accepted Answer

kubectl logs mypod -c nginx

Answer

The -c flag specifies the container name when a pod runs multiple containers.

Question 2

A pod is stuck in the 'Pending' state. Which command provides the most useful diagnostic information?

Accepted Answer

kubectl describe pod <pod-name>

Answer

kubectl describe shows the Events section and conditions that reveal why a pod is pending, such as insufficient resources or unschedulable nodes.

Question 3

What does the 'CrashLoopBackOff' status indicate for a pod?

Accepted Answer

The pod's container repeatedly crashes and Kubernetes is backing off restart attempts

Answer

CrashLoopBackOff means the container starts, crashes, and Kubernetes keeps restarting it with increasing exponential delays.

Question 4

Which command lists events in a specific namespace sorted chronologically?

Accepted Answer

kubectl get events -n <namespace> --sort-by='.lastTimestamp'

Answer

kubectl get events with --sort-by='.lastTimestamp' lists events in chronological order, making it easy to trace the sequence of recent issues.

Question 5

A node shows 'NotReady' in kubectl get nodes. Which command gives the most detail about the node's condition?

Accepted Answer

kubectl describe node <node-name>

Answer

kubectl describe node shows Conditions, allocatable resources, taints, and events that explain why a node is NotReady.

(CKA) Certified Kubernetes Associate Practice Test