This CKA practice question tests your understanding of workloads & scheduling. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 in a Deployment is CrashLoopBackOff. 'kubectl logs' shows the application exits with code 1 after printing one line. The Pod has a liveness probe that checks an HTTP endpoint. What should be checked first?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Check the application logs and configuration that causes the exit code 1.
The application exits with code 1 after printing one line, which indicates a runtime error in the application itself. The liveness probe only restarts the container after the application has already failed; it does not prevent the initial crash. Therefore, the first step is to examine the application logs and configuration to understand why the process exits with code 1, as this is the root cause of the CrashLoopBackOff.
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.
✓
Check the application logs and configuration that causes the exit code 1.
Why this is correct
The application is crashing due to its own logic; logs should indicate the error.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Check if the liveness probe's initialDelaySeconds is too short.
Why it's wrong here
The application crashes regardless of the probe; the probe is not the cause.
✗
Check if the liveness probe endpoint is correctly configured.
Why it's wrong here
The application exits before the probe would matter.
✗
Check if the container has insufficient memory limits.
Why it's wrong here
Memory issues typically cause OOMKilled, not exit code 1.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often focus on the liveness probe configuration (options B and C) because the question mentions it, but the immediate cause is the application crash itself, which must be diagnosed first via logs.
Detailed technical explanation
How to think about this question
Exit code 1 is a generic error code returned by the application process, often due to misconfiguration, missing dependencies, or a runtime exception. The liveness probe in Kubernetes is designed to detect and restart unresponsive containers, but it cannot fix application-level startup failures. In practice, checking logs with `kubectl logs <pod> --previous` can reveal the exact error message from the previous container instance, which is critical for debugging CrashLoopBackOff scenarios.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKA question in full detail.
Workloads & Scheduling — This question tests Workloads & Scheduling — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Check the application logs and configuration that causes the exit code 1. — The application exits with code 1 after printing one line, which indicates a runtime error in the application itself. The liveness probe only restarts the container after the application has already failed; it does not prevent the initial crash. Therefore, the first step is to examine the application logs and configuration to understand why the process exits with code 1, as this is the root cause of the CrashLoopBackOff.
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: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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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