KCNA Container Orchestration 2

Question 1

Which Kubernetes object is responsible for maintaining a stable set of replica Pods running at any given time?

Accepted Answer

ReplicaSet

Answer

A ReplicaSet ensures that a specified number of Pod replicas are running at all times.

Question 2

What happens to Pods managed by a DaemonSet when a new node is added to the cluster?

Accepted Answer

A Pod is automatically scheduled on the new node

Answer

DaemonSets automatically schedule one Pod on every eligible node, including newly added ones.

Question 3

In Kubernetes, which scheduling concept allows you to attract Pods to specific nodes based on node labels?

Accepted Answer

Node Affinity

Answer

Node Affinity rules allow Pods to express preferences or requirements for scheduling on nodes with certain labels.

Question 4

What is the purpose of a Kubernetes Horizontal Pod Autoscaler (HPA)?

Accepted Answer

Adjusts the number of Pod replicas based on observed metrics

Answer

HPA automatically scales the number of Pod replicas in a workload based on CPU, memory, or custom metrics.

Question 5

Which field in a Pod spec defines the minimum and maximum CPU/memory resources a container can use?

Accepted Answer

resources (requests and limits)

Answer

The `resources` field with `requests` and `limits` sub-fields controls resource allocation per container.

(KCNA) Kubernetes and Cloud Native Associate Practice Test