This CKAD practice question tests your understanding of application observability and maintenance. Compare every option against the stated constraints before choosing — the best answer satisfies all requirements, not just the most obvious one. 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 pod is in CrashLoopBackOff state. You need to view the last few lines of its logs to understand why it is crashing. Which command is most appropriate?
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.
kubectl logs -f my-pod
Why wrong: Streams logs, not suitable for a quick look.
kubectl logs my-pod
Why wrong: Shows all logs, which may be too verbose.
kubectl logs my-pod --tail=20
Shows only the last 20 lines, ideal for recent errors.
kubectl get events --field-selector involvedObject.name=my-pod
Why wrong: Shows events, not container logs.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
kubectl logs my-pod --tail=20
The `--tail=20` flag limits the output to the last 20 lines of the pod's logs, which is the most efficient way to see the recent crash-related errors without scrolling through the entire log history. In a CrashLoopBackOff state, the pod is repeatedly restarting, so viewing the tail of the logs directly shows the most recent failure messages, which is the standard diagnostic approach.
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.
kubectl logs -f my-pod
Why it's wrong here
Streams logs, not suitable for a quick look.
kubectl logs my-pod
Why it's wrong here
Shows all logs, which may be too verbose.
kubectl logs my-pod --tail=20
Why this is correct
Shows only the last 20 lines, ideal for recent errors.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
kubectl get events --field-selector involvedObject.name=my-pod
Why it's wrong here
Shows events, not container logs.
Common exam traps
CNCF often tests the distinction between `kubectl logs` and `kubectl logs -f`, where candidates mistakenly choose the `-f` option thinking it shows 'the last few lines' because of the 'follow' concept, but `-f` actually streams new logs and does not limit output to a specific number of lines.
Trap categories for this question
Command / output trap
Shows all logs, which may be too verbose.
Detailed technical explanation
The `--tail` flag works by reading the container's log file from the end, using the same mechanism as `kubectl logs` but with an internal offset to skip earlier lines; this is particularly useful when the pod has a large log volume or has been restarting many times, as it avoids fetching and discarding irrelevant data. Under the hood, `kubectl logs` communicates with the kubelet API on the node, which reads the container's log file (typically stored at `/var/log/pods/` on the node) and streams it back; the `--tail` flag reduces the amount of data transferred and processed. In real-world scenarios, a pod in CrashLoopBackOff may have logs from previous restarts, and `--tail=20` ensures you see the last lines of the most recent crash, which often contain the stack trace or error that caused the exit.
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 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.
What to study next
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
Application Observability and Maintenance — This question tests Application Observability and Maintenance — Read the scenario before looking for a memorised answer..
The correct answer is: kubectl logs my-pod --tail=20 — The `--tail=20` flag limits the output to the last 20 lines of the pod's logs, which is the most efficient way to see the recent crash-related errors without scrolling through the entire log history. In a CrashLoopBackOff state, the pod is repeatedly restarting, so viewing the tail of the logs directly shows the most recent failure messages, which is the standard diagnostic approach.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This CKAD 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 CKAD exam.
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