This CKS practice question tests your understanding of supply chain security. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A developer wants to ensure that a pod always uses a specific version of an image that cannot be changed without updating the manifest. Which image reference should be used?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "always"
Why it matters: Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
myimage@sha256:abcdef...
A digest uniquely identifies the image content; any change results in a different digest.
myimage:latest
Why wrong: The 'latest' tag can change over time, leading to different image versions.
myimage:v1.0
Why wrong: Tags can be overwritten, so v1.0 could point to a different image later.
myimage:1.0.0
Why wrong: Version tags can be overwritten or point to different images; they are not immutable.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
myimage@sha256:abcdef...
Using an image digest (SHA256) ensures that the exact image is used, even if the tag is updated. This prevents unauthorized changes to the image without updating the manifest.
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.
myimage@sha256:abcdef...
Why this is correct
A digest uniquely identifies the image content; any change results in a different digest.
Clue confirmation
The clue word "always" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
myimage:latest
Why it's wrong here
The 'latest' tag can change over time, leading to different image versions.
myimage:v1.0
Why it's wrong here
Tags can be overwritten, so v1.0 could point to a different image later.
myimage:1.0.0
Why it's wrong here
Version tags can be overwritten or point to different images; they are not immutable.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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 CKS 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 CKS exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Supply Chain Security — study guide chapter
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FAQ
Supply Chain Security — This question tests Supply Chain Security — Read the scenario before looking for a memorised answer..
The correct answer is: myimage@sha256:abcdef... — Using an image digest (SHA256) ensures that the exact image is used, even if the tag is updated. This prevents unauthorized changes to the image without updating the manifest.
Identify which CKS exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Yes — watch for: "always". Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 21, 2026
This CKS 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 CKS exam.
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