Kubernetes Container Orchestration Container Orchestration 4

Question 1

Which Kubernetes object is used to store non-sensitive configuration data as key-value pairs?

Accepted Answer

ConfigMap

Answer

ConfigMaps decouple configuration artifacts from container images, making applications more portable.

Question 2

What is the difference between 'kubectl apply' and 'kubectl create'?

Accepted Answer

'apply' is declarative and can update existing resources; 'create' fails if the resource already exists

Answer

'kubectl apply' performs a three-way merge to create or update resources, while 'create' is imperative and errors on existing resources.

Question 3

What is a Pod Disruption Budget (PDB) used for?

Accepted Answer

Ensuring a minimum number of Pods remain available during voluntary disruptions

Answer

A PDB protects applications from having too many Pods taken down simultaneously during operations like node drains.

Question 4

Which probe type in Kubernetes is used to determine if a container is ready to accept traffic?

Accepted Answer

readinessProbe

Answer

A readinessProbe signals to Kubernetes when a container is ready, preventing traffic from being sent until it passes.

Question 5

What is the etcd component responsible for in a Kubernetes cluster?

Accepted Answer

Storing all cluster state and configuration as a distributed key-value store

Answer

etcd is the backing store for all Kubernetes cluster data, making its reliability critical to cluster operation.

Kubernetes Container Orchestration Practice Test