CKA Workloads and Scheduling Practice Question
Which command creates a ConfigMap named 'app-config' from a file 'config.properties'?
⚠ Common exam trap
Watch out — candidates often confuse `--from-file` (which imports a file's content as a ConfigMap entry) with `--from-env-file` (which imports environment variables from a file), or using the non-existent `--file` flag, leading candidates to select options that either use the wrong flag or misinterpret the file's purpose.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
kubectl create configmap app-config --from-file=config.properties
`kubectl create configmap app-config --from-file=config.properties` creates a ConfigMap named 'app-config' using the contents of the specified file. The `--from-file` flag reads the file and stores its entire content as a key-value pair, where the key defaults to the filename (config.properties) and the value is the file's content.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
kubectl create cm app-config --file=config.properties
Why it's wrong here
--file is not a valid flag.
- ✗
kubectl create configmap app-config --from-literal=config.properties
Why it's wrong here
--from-literal is for key=value pairs, not files.
- ✗
kubectl create configmap app-config --from-env-file=config.properties
Why it's wrong here
--from-env-file imports environment variables from a file, but the file must be in VAR=VAL format. The correct flag for a plain file is --from-file.
- ✓
kubectl create configmap app-config --from-file=config.properties
Why this is correct
Correct.
Go deeper
Related to this question
Learn chapter
Workloads and Pod Basics
Key term
kubectl Command Reference
kubectl is the command-line tool used to interact with and manage Kubernetes clusters by sending commands to the Kubernetes API.
Key term
ConfigMaps
A ConfigMap is a Kubernetes object that lets you store configuration data separately from your application code, so you can change settings without rebuilding or redeploying your container images.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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