CKA Resource Monitoring 2

Question 1

Which kubectl command shows the CPU and memory consumption of all pods in a specific namespace?

Accepted Answer

kubectl top pods -n <namespace>

Answer

The 'kubectl top pods -n <namespace>' command uses the Metrics Server API to display real-time CPU and memory usage for pods in the specified namespace.

Question 2

What does the 'kubectl top node' command report as the BASIS for percentage calculations?

Accepted Answer

The node's allocatable capacity

Answer

kubectl top node reports CPU and memory usage as a percentage of the node's allocatable capacity, not total physical capacity.

Question 3

A pod's container has no resource requests set. How does the Kubernetes scheduler treat this pod during placement?

Accepted Answer

The pod can be scheduled on any node regardless of available resources

Answer

Without resource requests, the scheduler does not account for the container's resource needs, so it can land on any node; however, a LimitRange can inject defaults if configured.

Question 4

Which Kubernetes object can automatically set default resource requests and limits for containers in a namespace?

Accepted Answer

LimitRange

Answer

A LimitRange object can define default request and limit values that are automatically applied to containers that do not specify their own.

Question 5

A container's memory usage exceeds its memory limit. What does Kubernetes do?

Accepted Answer

The container is OOMKilled and restarted according to the restart policy

Answer

When a container exceeds its memory limit, the Linux kernel OOM killer terminates the process, and Kubernetes restarts it based on the pod's restartPolicy.

(CKA) Certified Kubernetes Associate Practice Test

(CKA) Certified Kubernetes Associate Practice Test

CKA Resource Monitoring 2