- A
Configuration changes can be applied via SSH into the container
Why wrong: SSH into containers violates the immutable principle; configuration should be baked into the image.
- B
Container images are versioned and promoted through environments without modification
Immutable infrastructure promotes the same image through development, staging, and production without changes, ensuring consistency.
- C
When an update is needed, a new container image is built and deployed, and old containers are destroyed
This is the core practice of immutable infrastructure: replace rather than modify.
- D
Containers are updated in place by executing commands inside running containers
Why wrong: Immutable infrastructure discourages making changes to running instances; updates are done by replacing the container.
- E
Stateful applications require mutable infrastructure
Why wrong: Stateful applications can still follow immutable patterns by using stateful sets and external storage; immutability is about the container itself.
KCNA Container Orchestration Practice Question
This KCNA practice question tests your understanding of container orchestration. 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 TWO statements accurately describe the concept of immutable infrastructure in the context of container orchestration? (Select two.)
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
Container images are versioned and promoted through environments without modification
Option B is correct because immutable infrastructure treats container images as immutable artifacts that are versioned and promoted through environments (e.g., dev, staging, prod) without modification. This ensures consistency and reproducibility, as the same image is deployed across all stages without patching or altering it in place.
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.
- ✗
Configuration changes can be applied via SSH into the container
Why it's wrong here
SSH into containers violates the immutable principle; configuration should be baked into the image.
- ✓
Container images are versioned and promoted through environments without modification
Why this is correct
Immutable infrastructure promotes the same image through development, staging, and production without changes, ensuring consistency.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
When an update is needed, a new container image is built and deployed, and old containers are destroyed
Why this is correct
This is the core practice of immutable infrastructure: replace rather than modify.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Containers are updated in place by executing commands inside running containers
Why it's wrong here
Immutable infrastructure discourages making changes to running instances; updates are done by replacing the container.
- ✗
Stateful applications require mutable infrastructure
Why it's wrong here
Stateful applications can still follow immutable patterns by using stateful sets and external storage; immutability is about the container itself.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests the distinction between mutable and immutable patterns by presenting options that describe in-place updates (like SSH or exec commands) as valid, which candidates mistakenly accept if they confuse operational debugging with infrastructure management.
Detailed technical explanation
How to think about this question
Under the hood, immutable infrastructure relies on container image layers and registries (e.g., Docker Hub, Amazon ECR) to store versioned images. When an update is needed, a new image is built via a CI/CD pipeline (e.g., using Dockerfile changes), pushed to a registry, and then orchestrated by Kubernetes to perform a rolling update, which creates new pods with the new image and terminates old pods. This avoids configuration drift and ensures that every deployment is a fresh, identical copy of the image, simplifying rollbacks to a previous image tag.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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.
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FAQ
Questions learners often ask
What does this KCNA question test?
Container Orchestration — This question tests Container Orchestration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Container images are versioned and promoted through environments without modification — Option B is correct because immutable infrastructure treats container images as immutable artifacts that are versioned and promoted through environments (e.g., dev, staging, prod) without modification. This ensures consistency and reproducibility, as the same image is deployed across all stages without patching or altering it in place.
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.
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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