Kubernetes Core Concepts KCNA Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   What is the purpose of a Kubernetes Job?

   • ATo run long-running services
   • BTo ensure a Pod runs on every node
   • CTo provide load balancing for Pods
   • DTo run batch tasks that run to completion
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   What is the main difference between a ConfigMap and a Secret?

   • ASecrets are for sensitive data, while ConfigMaps are for non-sensitive configuration.
   • BConfigMaps are immutable, while Secrets are mutable.
   • CSecrets can only be used for environment variables, while ConfigMaps can be mounted as files.
   • DConfigMaps are stored in etcd, while Secrets are not.
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   What is the purpose of a Kubernetes Volume?

   • ATo provide storage that can be used by containers in a Pod
   • BTo store configuration data for applications
   • CTo manage network traffic between Pods
   • DTo provide a stable IP address for Pods
   Reveal Solution Discussion Select an answer first
5. 19application · medium

   A development team is containerizing an application that requires a database password and a configuration file with non-sensitive settings. They want to avoid baking these values into the container image and instead inject them at runtime. Which combination of Kubernetes objects should they use?

   • ASecret for both the password and the configuration file
   • BConfigMap for the password and Secret for the configuration file
   • CConfigMap for both the password and the configuration file
   • DSecret for the password and ConfigMap for the configuration file
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   When a new node is added to a cluster, what does a DaemonSet do?

   • AIt does nothing until manually triggered.
   • BIt deletes Pods from other nodes to balance.
   • CIt creates a new DaemonSet for the node.
   • DIt automatically starts a Pod on the new node.
   Reveal Solution Discussion Select an answer first