DevOps Containerization & Kubernetes 2

Question 1

What is a ConfigMap in Kubernetes?

Accepted Answer

An object for storing non-sensitive configuration data as key-value pairs

Answer

ConfigMaps decouple configuration from container images, letting you inject environment variables or config files into Pods at runtime.

Question 2

What is the difference between a StatefulSet and a Deployment in Kubernetes?

Accepted Answer

StatefulSets maintain stable Pod identities and ordered scaling, while Deployments treat Pods as interchangeable

Answer

StatefulSets are designed for stateful applications that need stable hostnames, persistent storage, and ordered Pod lifecycle management.

Question 3

What does a Kubernetes Ingress resource do?

Accepted Answer

Routes external HTTP/HTTPS traffic to internal Services based on rules

Answer

An Ingress exposes HTTP and HTTPS routes from outside the cluster, routing traffic to Services based on hostname and path rules.

Question 4

What is a DaemonSet in Kubernetes?

Accepted Answer

Ensures a copy of a Pod runs on every (or selected) node in the cluster

Answer

DaemonSets are used for node-level agents like log collectors, monitoring agents, or CNI plugins that must run on every node.

Question 5

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

Accepted Answer

Automatically scales the number of Pod replicas based on CPU/memory metrics

Answer

HPA monitors metrics and adjusts the replica count of a Deployment or StatefulSet to match current demand automatically.

DevOps Practice Test