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.
Which command creates a ConfigMap named 'app-config' from a file named 'config.properties'?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
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.
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.
Common exam trap: answer the scenario, not the keyword
The trap here is confusing `--from-file` with `--from-env-file`, as candidates often assume any file with key-value pairs will be parsed automatically, but `--from-file` treats the entire file as a single value, while `--from-env-file` parses each line as a separate key-value pair.
Trap categories for this question
Command / output trap
There is no 'apply configmap' command.
Detailed technical explanation
How to think about this question
Under the hood, `--from-file` reads the file content and stores it as a single entry in the ConfigMap's `data` field, with the filename (without extension) as the key. If the file contains multiple key-value pairs in a properties format, they are not parsed individually; instead, the entire file content becomes the value. For parsing a properties file into separate keys, `--from-env-file` is appropriate, but it expects a specific format (one `KEY=VALUE` per line) and ignores comments and blank lines.
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 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.
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.
Are there clue words in this question I should notice?
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
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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