Kubernetes Container Orchestration Kubernetes 5

Question 1

Which Kubernetes resource is used to store non-sensitive configuration data such as app settings?

Accepted Answer

ConfigMap

Answer

ConfigMaps store non-confidential key-value configuration data that can be consumed by Pods as environment variables or mounted files.

Question 2

What is the effect of setting a Pod's QoS class to 'Guaranteed'?

Accepted Answer

The Pod's resource requests and limits are equal, making it the last evicted under pressure

Answer

Guaranteed QoS is assigned when all containers set identical requests and limits; these Pods are evicted last during resource pressure.

Question 3

What is a Kubernetes ServiceAccount used for?

Accepted Answer

Providing an identity for processes running in Pods to authenticate with the API server

Answer

ServiceAccounts give Pods an identity so they can authenticate against the Kubernetes API server with appropriate RBAC permissions.

Question 4

Which RBAC resource binds a Role to a user, group, or ServiceAccount within a specific namespace?

Accepted Answer

RoleBinding

Answer

A RoleBinding grants the permissions defined in a Role to a subject (user, group, or ServiceAccount) within a specific namespace.

Question 5

What does the 'kubectl rollout undo deployment/<name>' command do?

Accepted Answer

Rolls back the Deployment to the previous revision

Answer

kubectl rollout undo reverts a Deployment to its previous recorded revision by switching to the prior ReplicaSet.

Kubernetes Container Orchestration Practice Test