- A
Increase the memory limit in the pod's container resource specification
OOMKilled indicates the container exceeded its configured memory limit. Increasing the memory limit allows the container to use more memory and prevents the OOM kill.
- B
Increase the CPU request for the container
Why wrong: OOMKilled is a memory issue, not a CPU issue. Increasing CPU requests will not prevent the container from being killed due to memory exhaustion.
- C
Delete and recreate the pod to clear the crash loop
Why wrong: Deleting and recreating the pod without changing the resource limits will result in the same OOMKilled event.
- D
Delete the namespace and redeploy all workloads
Why wrong: This is a destructive action that would affect all workloads in the namespace. It is not appropriate for resolving a single pod's memory issue.
CKAD Application Observability and Maintenance Practice Question
This CKAD practice question tests your understanding of application observability and maintenance. 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 pod in the 'production' namespace is in a CrashLoopBackOff state. The pod has been running successfully for several days. You run 'kubectl describe pod app-pod -n production' and see the message: 'OOMKilled'. What is the MOST appropriate action to resolve this issue?
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
Increase the memory limit in the pod's container resource specification
The pod is in CrashLoopBackOff due to OOMKilled, meaning the container exceeded its memory limit and was terminated by the Linux kernel's Out-Of-Memory (OOM) killer. Increasing the memory limit in the pod's container resource specification allows the container to use more memory without being killed, directly resolving the OOM condition.
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.
- ✓
Increase the memory limit in the pod's container resource specification
Why this is correct
OOMKilled indicates the container exceeded its configured memory limit. Increasing the memory limit allows the container to use more memory and prevents the OOM kill.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Increase the CPU request for the container
Why it's wrong here
OOMKilled is a memory issue, not a CPU issue. Increasing CPU requests will not prevent the container from being killed due to memory exhaustion.
- ✗
Delete and recreate the pod to clear the crash loop
Why it's wrong here
Deleting and recreating the pod without changing the resource limits will result in the same OOMKilled event.
- ✗
Delete the namespace and redeploy all workloads
Why it's wrong here
This is a destructive action that would affect all workloads in the namespace. It is not appropriate for resolving a single pod's memory issue.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse OOMKilled with a general crash and choose to delete/recreate the pod, not realizing the OOMKilled status specifically indicates a memory limit violation that requires adjusting resource limits.
Detailed technical explanation
How to think about this question
When a container's memory usage exceeds its `limits.memory`, the Linux kernel's OOM killer terminates the container process, resulting in an OOMKilled status. The `resources.limits.memory` field in the pod spec sets a hard limit; increasing it (or removing it) allows the container to use more memory. Note that `requests.memory` is used for scheduling and does not prevent OOM kills.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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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Application Observability and Maintenance — study guide chapter
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FAQ
Questions learners often ask
What does this CKAD question test?
Application Observability and Maintenance — This question tests Application Observability and Maintenance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Increase the memory limit in the pod's container resource specification — The pod is in CrashLoopBackOff due to OOMKilled, meaning the container exceeded its memory limit and was terminated by the Linux kernel's Out-Of-Memory (OOM) killer. Increasing the memory limit in the pod's container resource specification allows the container to use more memory without being killed, directly resolving the OOM condition.
What should I do if I get this CKAD question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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 25, 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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