Kubernetes Container Orchestration Kubernetes 4

Question 1

What happens when a Pod's liveness probe fails repeatedly?

Accepted Answer

The container is restarted according to the Pod's restart policy

Answer

When a liveness probe fails beyond the threshold, kubelet restarts the container based on the Pod's restartPolicy.

Question 2

Which Kubernetes object is best suited for running a batch task that should complete successfully and then stop?

Accepted Answer

Job

Answer

A Job creates one or more Pods and tracks their successful completions, terminating when the specified number of completions is reached.

Question 3

What is the purpose of resource requests in a Pod spec?

Accepted Answer

They tell the scheduler how much CPU/memory to reserve for scheduling decisions

Answer

Resource requests inform the scheduler of the minimum resources needed, which it uses to find an appropriate node for placement.

Question 4

Which Kubernetes feature allows a Secret or ConfigMap to be projected into a Pod as environment variables or mounted files?

Accepted Answer

Volume mounts and envFrom/env fields

Answer

ConfigMaps and Secrets can be consumed in Pods via envFrom/env fields for environment variables or via volumeMounts for file projection.

Question 5

What does 'kubectl cordon <node>' do?

Accepted Answer

Marks the node as unschedulable so no new Pods are placed on it

Answer

Cordoning a node sets it to 'SchedulingDisabled', preventing the scheduler from placing new Pods while existing Pods continue running.

Kubernetes Container Orchestration Practice Test