KCNA Container Orchestration Practice Question
Which of the following best describes immutable infrastructure?
⚠ Common exam trap
Test-takers frequently confuse immutable infrastructure with specific deployment patterns (blue/green) or security features (read-only filesystems), rather than recognizing the core principle of replacement over modification.
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
✓
Infrastructure components that are replaced rather than changed after deployment
Immutable infrastructure is a pattern where components (servers, containers, etc.) are never modified after deployment. Instead, any change requires building a new instance from a golden image or template and replacing the old one. This eliminates configuration drift and ensures consistency, which is a core principle in container orchestration with tools like Kubernetes, where Pods are replaced rather than patched in place.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Servers that are updated in-place with configuration management tools
Why it's wrong here
In-place updates are the opposite of immutable infrastructure.
- ✗
Infrastructure that is version-controlled and deployed using blue/green deployments
Why it's wrong here
This is a related practice but not the core definition.
- ✓
Infrastructure components that are replaced rather than changed after deployment
Why this is correct
Immutable infrastructure replaces components instead of modifying them.
- ✗
Infrastructure that uses only read-only file systems
Why it's wrong here
Read-only file systems are a security measure but not the definition of immutable infrastructure.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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