- A
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.
- B
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.
- C
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.
- 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.
CKA Practice Question: Cluster Architecture, Installation and Configuration
This CKA practice question tests your understanding of cluster architecture, installation and configuration. 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 with an OOMKilled message, which indicates the container was terminated because it exceeded its memory limit. The most appropriate action is to increase the memory limit in the pod's container resource specification, allowing the container to allocate more memory without being killed by the Out-Of-Memory (OOM) killer.
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.
- ✗
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.
- ✓
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 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 CPU throttling issue or think that simply restarting the pod will fix the problem, when in fact the memory limit must be adjusted to prevent the OOM killer from terminating the container.
Detailed technical explanation
How to think about this question
When a container exceeds its memory limit (specified in the resources.limits.memory field), the Linux kernel's OOM killer terminates the container process to protect the node. The pod's restart policy then triggers a restart, leading to CrashLoopBackOff if the memory issue persists. Increasing the memory limit or optimizing the application's memory usage are the correct solutions; the limit is enforced via cgroups, and the OOM killer is invoked when the container's memory usage hits the cgroup memory limit.
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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FAQ
Questions learners often ask
What does this CKA question test?
Cluster Architecture, Installation and Configuration — This question tests Cluster Architecture, Installation and Configuration — 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 with an OOMKilled message, which indicates the container was terminated because it exceeded its memory limit. The most appropriate action is to increase the memory limit in the pod's container resource specification, allowing the container to allocate more memory without being killed by the Out-Of-Memory (OOM) killer.
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.
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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