DevOps Kubernetes & Orchestration 2

Question 1

What is a Kubernetes Namespace used for?

Accepted Answer

Dividing cluster resources between multiple users or teams

Answer

Namespaces provide a mechanism for isolating groups of resources within a single cluster, commonly used to separate environments like dev, staging, and production.

Question 2

What does a Kubernetes HorizontalPodAutoscaler (HPA) do?

Accepted Answer

Automatically scales the number of Pods based on CPU or custom metrics

Answer

The HPA controller periodically checks metrics and adjusts the replica count of a Deployment or ReplicaSet to meet the target utilization threshold.

Question 3

What is the purpose of a Kubernetes Ingress resource?

Accepted Answer

Manages external HTTP/HTTPS access to services within the cluster

Answer

An Ingress resource defines rules for routing external HTTP/HTTPS traffic to internal Services based on hostnames and URL paths.

Question 4

What is etcd in a Kubernetes cluster?

Accepted Answer

A distributed key-value store that holds all cluster state and configuration

Answer

etcd is the backing store for all Kubernetes cluster data — every object, configuration, and state change is persisted in etcd.

Question 5

What is a Kubernetes DaemonSet?

Accepted Answer

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

Answer

A DaemonSet ensures that all or selected nodes run a copy of a Pod, commonly used for cluster-wide services like log collectors, monitoring agents, or network plugins.

DevOps Practice Test

DevOps Practice Test

DevOps Kubernetes & Orchestration 2