- 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
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.
- C
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.
- D
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.
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 'OOMKilled' status indicates the pod's container was terminated because it exceeded its memory limit. Since the pod ran successfully for days, a gradual memory leak or increased workload likely caused the usage to spike past the configured limit. Increasing the memory limit in the container's resource specification allows the pod to handle the higher memory demand without being killed, resolving 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.
- ✓
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.
- ✗
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.
- ✗
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse OOMKilled with a general crash and choose to delete/recreate the pod, not realizing the underlying memory limit is the cause and must be adjusted.
Detailed technical explanation
How to think about this question
Under the hood, Kubernetes uses cgroups v1 or v2 to enforce memory limits; when the container's memory usage exceeds the limit, the kernel's OOM killer terminates the process. The 'resources.limits.memory' field in the pod spec sets a hard cap, and if the application has a memory leak, the limit must be raised or the leak fixed. In real-world scenarios, monitoring memory usage over time with tools like 'kubectl top pod' or Prometheus helps distinguish between a leak (gradual increase) and a sudden spike.
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.
- →
Application Observability and Maintenance — study guide chapter
Learn the concepts, then practise the questions
- →
Application Observability and Maintenance practice questions
Targeted practice on this topic area only
- →
All CKAD questions
991 questions across all exam domains
- →
Certified Kubernetes Application Developer CKAD study guide
Full concept coverage aligned to exam objectives
- →
CKAD practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related CKAD practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Application Design and Build practice questions
Practise CKAD questions linked to Application Design and Build.
Application Deployment practice questions
Practise CKAD questions linked to Application Deployment.
Application Environment, Configuration and Security practice questions
Practise CKAD questions linked to Application Environment, Configuration and Security.
Application Observability and Maintenance practice questions
Practise CKAD questions linked to Application Observability and Maintenance.
Services and Networking practice questions
Practise CKAD questions linked to Services and Networking.
CKAD fundamentals practice questions
Practise CKAD questions linked to CKAD fundamentals.
CKAD scenario practice questions
Practise CKAD questions linked to CKAD scenario.
CKAD troubleshooting practice questions
Practise CKAD questions linked to CKAD troubleshooting.
Practice this exam
Start a free CKAD practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
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 'OOMKilled' status indicates the pod's container was terminated because it exceeded its memory limit. Since the pod ran successfully for days, a gradual memory leak or increased workload likely caused the usage to spike past the configured limit. Increasing the memory limit in the container's resource specification allows the pod to handle the higher memory demand without being killed, resolving the CrashLoopBackOff.
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
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.