The correct command is `kubectl create configmap app-config --from-file=config.properties`. This works because the `--from-file` flag instructs kubectl to read the specified file and automatically use its filename as the ConfigMap key, with the entire file contents as the corresponding value. On the CKAD exam, this tests your ability to inject configuration data into pods without hardcoding values, and it frequently appears in multi-resource YAML or imperative command scenarios. A common trap is confusing `--from-file` with `--from-literal`; remember that `--from-file` imports an entire file’s content, while `--from-literal` takes a direct key-value pair. For a memory tip, think “file equals key”: when you use `--from-file`, the filename becomes the key, so `config.properties` becomes the key name in the ConfigMap.
CKAD Practice Question: Application Environment, Configuration and Security
This CKAD practice question tests your understanding of application environment, configuration and security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An administrator needs to create a ConfigMap named 'app-config' from a file called 'config.properties'. Which kubectl command accomplishes this?
Option B is correct because `kubectl create configmap app-config --from-file=config.properties` reads the file `config.properties` and creates a ConfigMap where the key is the filename (config.properties) and the value is the file's content. This is the standard way to create a ConfigMap from a single file in Kubernetes.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
This creates a ConfigMap with a specific key 'key1' from the file content, not with the filename as key.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing `--from-file` (which stores the file content as a single value) with `--from-env-file` (which parses key-value pairs) or `--from-literal` (which expects inline key=value syntax), leading candidates to choose options that either misinterpret the file format or incorrectly specify the key.
Detailed technical explanation
How to think about this question
When using `--from-file`, Kubernetes reads the file and stores its entire content as the value under a key equal to the filename (without path). This is useful for configuration files like `.properties`, `.yaml`, or `.json` that need to be mounted as-is into pods. The `--from-env-file` flag, by contrast, parses the file line by line for `KEY=VALUE` pairs, which is ideal for environment variable injection but not for preserving the original file structure.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the CKAD exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKAD question in full detail.
Application Environment, Configuration and Security — This question tests Application Environment, Configuration and Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: kubectl create configmap app-config --from-file=config.properties — Option B is correct because `kubectl create configmap app-config --from-file=config.properties` reads the file `config.properties` and creates a ConfigMap where the key is the filename (config.properties) and the value is the file's content. This is the standard way to create a ConfigMap from a single file in Kubernetes.
What should I do if I get this CKAD question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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