Certified Kubernetes Application Developer (CKAD) Practice Test

Which resource can be mounted into pods to store non-sensitive configuration information?

1. Secrets

2. ConfigMaps

3. PersistentVolumes

4. ServiceAccounts

The correct answer is: ConfigMaps

The correct answer is ConfigMaps because they are specifically designed to store non-sensitive configuration data in key-value pairs, which can be easily accessed by applications running in pods. ConfigMaps allow developers to decouple configuration artifacts from container images, making applications more portable and easier to manage. They can be used to inject configuration settings into containers either as environment variables or as files mounted on a volume within the pod. While Secrets are also a type of Kubernetes resource for storing configuration data, they are intended for sensitive information, such as passwords or API keys, and are handled differently in terms of security and access. PersistentVolumes are storage resources used to retain data beyond the lifecycle of a pod but do not specifically address the need for configuration data. ServiceAccounts manage permissions and access controls for processes running in pods, which is unrelated to storing configuration. In summary, ConfigMaps serve the specific purpose of managing non-sensitive configuration data effectively within Kubernetes environments.