CKAD Practice Question: Application Environment, Configuration and Security
This CKAD practice question tests your understanding of application environment, configuration and security. 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.
You create a ResourceQuota in a namespace that sets requests.cpu: '1' and limits.cpu: '2'. A pod spec has no resource limits or requests. What happens when you try to create this pod?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The pod creation is denied because the spec does not specify resource limits or requests
When a ResourceQuota is defined with requests.cpu and limits.cpu, Kubernetes requires that every pod in that namespace have explicit resource requests and limits that match the quota constraints. If a pod spec omits these fields, the API server denies the pod creation because it cannot determine whether the pod complies with the quota. This is enforced at admission time, not at runtime.
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.
✗
The pod is created without limits, but the quota is enforced at runtime
Why it's wrong here
ResourceQuota enforces at admission time, not runtime.
✓
The pod creation is denied because the spec does not specify resource limits or requests
Why this is correct
ResourceQuota requires that all pods in the namespace have resource limits/requests when quota is set.
Related concept
Read the scenario before looking for a memorised answer.
✗
The pod is created and the quota is ignored
Why it's wrong here
Quota is not optional when set.
✗
The pod is created with default limits from the LimitRange
Why it's wrong here
No LimitRange is mentioned; without it, pod creation fails.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume a LimitRange will automatically apply default resource values, but without a LimitRange, the pod creation is denied outright due to the missing fields required by the ResourceQuota.
Detailed technical explanation
How to think about this question
Under the hood, the Kubernetes API server runs admission controllers, including the ResourceQuota admission controller, which validates that every pod's resource requests and limits are within the quota's hard limits. If the pod spec lacks the required fields, the controller cannot perform this check and rejects the request with a 403 Forbidden. In a real-world scenario, this prevents silent overcommit of cluster resources and ensures that quota enforcement is predictable and consistent.
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 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CKAD question in full detail.
Application Environment, Configuration and Security — This question tests Application Environment, Configuration and Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The pod creation is denied because the spec does not specify resource limits or requests — When a ResourceQuota is defined with requests.cpu and limits.cpu, Kubernetes requires that every pod in that namespace have explicit resource requests and limits that match the quota constraints. If a pod spec omits these fields, the API server denies the pod creation because it cannot determine whether the pod complies with the quota. This is enforced at admission time, not at runtime.
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.
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Question Discussion
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