The correct command is `kubectl create configmap app-config --from-file=config.properties`. This works because the `--from-file` flag tells kubectl to read the specified file's content and create a ConfigMap where the key is the filename (in this case, `config.properties`) and the value is the entire file content, making it the standard Kubernetes method for importing configuration data from a local file. On the CKAD exam, this tests your ability to quickly generate ConfigMaps from existing configuration files without manually typing key-value pairs—a common scenario in application deployment tasks. A frequent trap is confusing `--from-file` with `--from-literal`; remember that `--from-file` imports an entire file as a single value, while `--from-literal` is for inline key-value pairs. For a memory tip, think "file equals key" — the filename becomes the ConfigMap key, so you don't need to specify a key name separately.
CKAD Practice Question: Application Environment, Configuration and Security
This CKAD practice question tests your understanding of application environment, configuration and security. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Which kubectl command creates a ConfigMap named 'app-config' from a file 'config.properties'?
Why wrong: --from-env-file is for reading key-value pairs from a file in env format, but it treats each line as a key=value pair, not a single-file data source.
Option A is correct because `kubectl create configmap` with the `--from-file` flag creates a ConfigMap from a file, using the filename as the key and the file content as the value. This is the standard Kubernetes method to import configuration data from a local file into a ConfigMap resource.
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.
--from-literal expects key=value pairs, not a file path.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing `--from-file` (which stores the entire file as a single entry) with `--from-env-file` (which parses key-value pairs), leading candidates to choose option C when they need to preserve the file's original format.
Detailed technical explanation
How to think about this question
When using `--from-file=config.properties`, kubectl reads the entire file content and stores it under a key equal to the filename (e.g., `config.properties`). This is useful for configuration files that are not in key-value format, such as JSON or YAML configs. In contrast, `--from-env-file` parses the file line by line for `KEY=VALUE` pairs, creating separate entries in the ConfigMap, which is ideal for environment variable injection into pods.
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 A is correct because `kubectl create configmap` with the `--from-file` flag creates a ConfigMap from a file, using the filename as the key and the file content as the value. This is the standard Kubernetes method to import configuration data from a local file into a ConfigMap resource.
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.
About these practice questions
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Why A: Option A is correct because `kubectl create configmap app-config --from-file=config.properties` directly reads the file `config.properties` and creates a ConfigMap named `app-config` with each key-value pair from the file. The `--from-file` flag is the standard way to import a single file's contents as a ConfigMap, where the filename becomes the key and the file content becomes the value.
Variation 2. Which kubectl command creates a ConfigMap named 'app-config' from a file 'app.properties'?
Why A: Option A is correct because `kubectl create configmap app-config --from-file=app.properties` reads the file `app.properties` and creates a ConfigMap with a single key-value pair where the key is the filename (without extension) and the value is the entire file content. This is the standard way to create a ConfigMap from a file in Kubernetes.
Variation 3. Which kubectl command creates a ConfigMap named 'app-config' from a file named 'config.properties'?
Why A: Option A is correct because `kubectl create configmap app-config --from-file=config.properties` creates a ConfigMap named 'app-config' by reading the entire contents of the file 'config.properties' and storing it as a single key-value pair, where the key defaults to the filename (config.properties) and the value is the file's content. This is the standard syntax for creating a ConfigMap from a file in Kubernetes.
Variation 4. Which kubectl command creates a ConfigMap named 'app-config' from a file called 'config.properties'?
Why C: Option C is correct because the `kubectl create configmap` command with the `--from-file` flag directly creates a ConfigMap from the contents of a specified file, using the filename as the key and the file content as the value. This is the standard method for creating a ConfigMap from a single file like 'config.properties'.
Variation 5. Which kubectl command correctly creates a ConfigMap from a file named 'app.properties'?
Why D: Option D is correct because `kubectl create configmap app-config --from-file=app.properties` creates a ConfigMap by reading the entire contents of the file 'app.properties' and storing it under a key that defaults to the filename (app.properties). This is the standard way to import a file's data as a single key-value pair in a ConfigMap.
Last reviewed: Jun 25, 2026
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