KCNA Container Orchestration 4

Question 1

What Kubernetes feature allows you to run multiple containers that share the same network namespace within a single Pod?

Accepted Answer

Multi-container Pods

Answer

Kubernetes allows multiple containers in a Pod to share the same network namespace, IP address, and port space.

Question 2

Which Kubernetes component stores the entire cluster state, including configuration and status of all objects?

Accepted Answer

etcd

Answer

etcd is the distributed key-value store that Kubernetes uses as its backing store for all cluster data.

Question 3

A Deployment is updated with a new image. Which strategy replaces Pods one at a time, ensuring no downtime?

Accepted Answer

RollingUpdate

Answer

The RollingUpdate strategy incrementally replaces old Pods with new ones, keeping the application available during the update.

Question 4

What does `kubectl rollout undo deployment/my-app` do?

Accepted Answer

Rolls back the Deployment to the previous revision

Answer

The `rollout undo` command reverts a Deployment to its previous revision stored in its rollout history.

Question 5

Which Kubernetes concept allows cluster operators to restrict the total amount of CPU and memory that can be consumed within a namespace?

Accepted Answer

ResourceQuota

Answer

ResourceQuota sets aggregate limits on resource consumption (CPU, memory, object count) for an entire namespace.

(KCNA) Kubernetes and Cloud Native Associate Practice Test