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.
Which TWO resources can be used to store configuration data separately from container images?
Service
Why wrong: Services provide network access to Pods, not configuration.
PersistentVolume
Why wrong: PersistentVolumes provide storage, not configuration.
Secret
Secrets store sensitive data like passwords or tokens.
Deployment
Why wrong: Deployments manage Pod replicas, not configuration data.
ConfigMap
ConfigMaps store non-sensitive configuration data.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Secret
ConfigMaps and Secrets are Kubernetes API objects designed specifically to decouple configuration data and sensitive information from container images. ConfigMaps store non-sensitive key-value pairs (e.g., environment variables, command-line arguments, or configuration files), while Secrets store sensitive data (e.g., passwords, tokens, or SSH keys) in base64-encoded or encrypted form. Both can be mounted into pods as volumes or injected as environment variables, allowing image reuse across different environments without rebuilding.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Service
Why it's wrong here
Services provide network access to Pods, not configuration.
PersistentVolume
Why it's wrong here
PersistentVolumes provide storage, not configuration.
Secret
Why this is correct
Secrets store sensitive data like passwords or tokens.
Related concept
Read the scenario before looking for a memorised answer.
Deployment
Why it's wrong here
Deployments manage Pod replicas, not configuration data.
ConfigMap
Why this is correct
ConfigMaps store non-sensitive configuration data.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
CNCF often tests the distinction between storage for configuration data (ConfigMaps/Secrets) vs. storage for application data (PersistentVolumes), so candidates mistakenly select PersistentVolume thinking it can store config files, but it is intended for stateful workloads like databases, not for decoupling configuration from images.
Detailed technical explanation
Under the hood, ConfigMaps and Secrets are stored in etcd as key-value resources, and when mounted as volumes, they are projected into the pod's filesystem using tmpfs (for Secrets) or a regular file system (for ConfigMaps). A subtle behavior: Secrets are not encrypted at rest by default in etcd unless you enable encryption at rest (e.g., with a KMS provider), so they should be treated as 'obfuscated' rather than fully secure. In a real-world CI/CD pipeline, you might use ConfigMaps to inject environment-specific settings (e.g., database URLs) without modifying the container image, enabling immutable image deployments.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Kubernetes Fundamentals — This question tests Kubernetes Fundamentals — Read the scenario before looking for a memorised answer..
The correct answer is: Secret — ConfigMaps and Secrets are Kubernetes API objects designed specifically to decouple configuration data and sensitive information from container images. ConfigMaps store non-sensitive key-value pairs (e.g., environment variables, command-line arguments, or configuration files), while Secrets store sensitive data (e.g., passwords, tokens, or SSH keys) in base64-encoded or encrypted form. Both can be mounted into pods as volumes or injected as environment variables, allowing image reuse across different environments without rebuilding.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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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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