- A
The ConfigMap data is immutable and cannot be updated
Why wrong: ConfigMaps can be updated unless they are marked as immutable. By default, they are mutable.
- B
The ConfigMap is referenced by a different name in the pod spec
Why wrong: If the name were different, the pods would not have the updated ConfigMap at all; here they have the old configuration, so the name is correct.
- C
The ConfigMap is mounted as a volume, and the pods have not been restarted
When a ConfigMap is mounted as a volume, the files are updated eventually, but the application may not automatically reload the configuration. For environment variables, the pod must be restarted. In either case, without a restart, the old configuration is used.
- D
The Deployment's update strategy is set to Recreate
Why wrong: The update strategy affects how pods are replaced during a Deployment update, not how ConfigMap changes are propagated.
KCNA Kubernetes Fundamentals Practice Question
This KCNA practice question tests your understanding of kubernetes fundamentals. 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.
You have a Deployment that uses a ConfigMap for configuration. You update the ConfigMap with new data. However, the pods in the Deployment continue to use the old configuration. What is the most likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
The ConfigMap is mounted as a volume, and the pods have not been restarted
When a ConfigMap is mounted as a volume in a Pod, updates to the ConfigMap are automatically propagated to the mounted files, but the running process inside the container does not automatically reload the configuration. The Pod must be restarted (e.g., by rolling update or manual deletion) for the application to read the new values. This is the most common reason for stale configuration in a Deployment.
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.
- ✗
The ConfigMap data is immutable and cannot be updated
Why it's wrong here
ConfigMaps can be updated unless they are marked as immutable. By default, they are mutable.
- ✗
The ConfigMap is referenced by a different name in the pod spec
Why it's wrong here
If the name were different, the pods would not have the updated ConfigMap at all; here they have the old configuration, so the name is correct.
- ✓
The ConfigMap is mounted as a volume, and the pods have not been restarted
Why this is correct
When a ConfigMap is mounted as a volume, the files are updated eventually, but the application may not automatically reload the configuration. For environment variables, the pod must be restarted. In either case, without a restart, the old configuration is used.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The Deployment's update strategy is set to Recreate
Why it's wrong here
The update strategy affects how pods are replaced during a Deployment update, not how ConfigMap changes are propagated.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests the misconception that updating a ConfigMap automatically updates running Pods, when in fact the Pod must be restarted (or the application must watch for file changes) for the new configuration to take effect.
Detailed technical explanation
How to think about this question
When a ConfigMap is mounted as a volume, the kubelet periodically syncs the data (default interval is 60 seconds) and updates the files in the volume. However, the application process must watch for file changes or be restarted to reload the configuration. For environment variable-based consumption, updates to the ConfigMap are not propagated at all; the Pod must be recreated. This is a common pitfall in production where configuration changes appear to take effect but are not reflected until a rollout restart is performed.
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 KCNA 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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Kubernetes Fundamentals — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this KCNA question test?
Kubernetes Fundamentals — This question tests Kubernetes Fundamentals — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The ConfigMap is mounted as a volume, and the pods have not been restarted — When a ConfigMap is mounted as a volume in a Pod, updates to the ConfigMap are automatically propagated to the mounted files, but the running process inside the container does not automatically reload the configuration. The Pod must be restarted (e.g., by rolling update or manual deletion) for the application to read the new values. This is the most common reason for stale configuration in a Deployment.
What should I do if I get this KCNA 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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 30, 2026
This KCNA practice question is part of Courseiva's free CNCF certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the KCNA exam.
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