KCNA Pod Management & Scheduling 3

Question 1

Which field in a container spec sets environment variables from all keys in a ConfigMap?

Accepted Answer

envFrom with configMapRef

Answer

`envFrom` with a `configMapRef` injects all key-value pairs from a ConfigMap as environment variables into the container.

Question 2

A node is tainted with `key=value:NoSchedule`. Which pod spec element allows a pod to be scheduled on that node?

Accepted Answer

tolerations

Answer

A toleration matching the taint's key, value, and effect allows the pod to be scheduled on the tainted node.

Question 3

What is the default behavior when a liveness probe fails repeatedly?

Accepted Answer

The container is killed and restarted according to the restartPolicy

Answer

When a liveness probe fails beyond `failureThreshold`, Kubernetes kills the container and restarts it per the pod's restartPolicy.

Question 4

Which Pod QoS class is assigned when a container has no resource requests or limits defined?

Accepted Answer

BestEffort

Answer

Pods with no resource requests or limits are classified as BestEffort, the lowest QoS class, and are first to be evicted under pressure.

Question 5

How does Kubernetes handle a static pod if its defining manifest file is deleted from the node?

Accepted Answer

The kubelet deletes the running pod automatically

Answer

The kubelet watches the staticPodPath directory and deletes any running static pod whose manifest file is removed.

(KCNA) Kubernetes and Cloud Native Associate Practice Test