This CKAD practice question tests your understanding of services and networking. 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.
A Service named 'api' has no endpoints. 'kubectl describe svc api' shows the selector 'app: api', but no pods have that label. What is the most likely reason for missing endpoints?
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.
The Service is in a different namespace than the pods
Why wrong: Services and pods can be in different namespaces? Actually, the selector selects pods in the same namespace. But if pods are in a different namespace, they won't be selected. However, the question implies no pods with that label exist, so that's the issue.
B
No pods match the Service's selector
The selector 'app: api' does not match any pods, so no endpoints.
C
The Service port is incorrect
Why wrong: Port does not affect endpoint creation.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
No pods match the Service's selector
Endpoints are created by the Service based on the selector. If no pods match the selector, the endpoints list will be empty. The solution is to check the pod labels.
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 Service is in a different namespace than the pods
Why it's wrong here
Services and pods can be in different namespaces? Actually, the selector selects pods in the same namespace. But if pods are in a different namespace, they won't be selected. However, the question implies no pods with that label exist, so that's the issue.
✓
No pods match the Service's selector
Why this is correct
The selector 'app: api' does not match any pods, so no endpoints.
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 Service port is incorrect
Why it's wrong here
Port does not affect endpoint creation.
✗
The Service type is ExternalName
Why it's wrong here
ExternalName does not use selectors.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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
How to think about this question
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.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 CKAD 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKAD question in full detail.
Identify which CKAD 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.
Services and Networking — This question tests Services and Networking — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: No pods match the Service's selector — Endpoints are created by the Service based on the selector. If no pods match the selector, the endpoints list will be empty. The solution is to check the pod labels.
What should I do if I get this CKAD question wrong?
Identify which CKAD 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.
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.
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Question Discussion
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