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CKA Troubleshooting Practice Question
This CKA practice question tests your understanding of troubleshooting. 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.
You suspect that the kube-scheduler is not running. Which command checks the scheduler's health?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"which command"Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
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
✓
kubectl get componentstatuses
Option C is correct because `kubectl get componentstatuses` (or `cs`) queries the Kubernetes API server for the health of core control plane components, including the scheduler. The API server periodically performs a health check against each component and reports its status as Healthy or Unhealthy. This command directly shows whether the scheduler is reachable and responding, making it the appropriate diagnostic tool when you suspect the scheduler is down.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse checking the scheduler's pod status (Option B) with checking its health endpoint, or they assume systemd commands (Option A) work in containerized environments, leading them to overlook the dedicated `componentstatuses` command that directly queries the scheduler's health via the API server.
Detailed technical explanation
How to think about this question
The `componentstatuses` API object is backed by the API server's internal health probes to etcd, the controller manager, and the scheduler. Each component registers a health check endpoint (e.g., `/healthz` on the scheduler's secure port, typically 10259), and the API server polls these endpoints at a configurable interval (default 5 seconds). In newer Kubernetes versions (1.19+), `componentstatuses` is deprecated and may not be available in some distributions (e.g., EKS, GKE), but it remains a valid command in standard CKA clusters; for production, you might use `kubectl get --raw /healthz?verbose` to see component health directly.
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 practitioner preparing for the CKA 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
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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Troubleshooting — study guide chapter
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FAQ
Questions learners often ask
What does this CKA question test?
Troubleshooting — This question tests Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: kubectl get componentstatuses — Option C is correct because `kubectl get componentstatuses` (or `cs`) queries the Kubernetes API server for the health of core control plane components, including the scheduler. The API server periodically performs a health check against each component and reports its status as Healthy or Unhealthy. This command directly shows whether the scheduler is reachable and responding, making it the appropriate diagnostic tool when you suspect the scheduler is down.
What should I do if I get this CKA question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 24, 2026
This CKA 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 CKA exam.
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