CKAD Practice Question: Application Environment, Configuration and Security
This CKAD practice question tests your understanding of application environment, configuration and security. 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 namespace with a ResourceQuota that sets 'limits.cpu: 4' and 'limits.memory: 8Gi' is being created with the following container resources: requests: cpu: 2, memory: 4Gi; limits: cpu: 4, memory: 8Gi. The namespace also has a LimitRange with default limits of cpu: 500m, memory: 512Mi. Which statement is true about this resource configuration?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The Pod will be admitted because it respects both the ResourceQuota and the LimitRange
B is correct because the Pod explicitly sets its own limits (cpu: 4, memory: 8Gi) and requests (cpu: 2, memory: 4Gi), which are within the ResourceQuota's 'limits.cpu: 4' and 'limits.memory: 8Gi' constraints. The LimitRange default limits only apply to containers that do not specify limits; since this Pod specifies limits, the defaults are ignored. The Pod is admitted as it satisfies both admission controllers.
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 will have its limits overridden by the LimitRange defaults because limits must be set
Why it's wrong here
Limits are already set; LimitRange defaults only apply when limits are not set.
✓
The Pod will be admitted because it respects both the ResourceQuota and the LimitRange
Why this is correct
The pod's limits do not exceed the quota, and since limits are specified, LimitRange defaults are not applied.
Related concept
Read the scenario before looking for a memorised answer.
✗
The Pod will be rejected because the limits exceed the LimitRange default
Why it's wrong here
LimitRange defaults do not enforce maximums, only provide defaults. The quota enforces maxima.
✗
The Pod will be rejected because requests must equal limits
Why it's wrong here
There is no such requirement. Requests can be less than limits.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume LimitRange defaults always override Pod specifications, but in reality defaults only apply when the Pod does not set its own limits, and the Pod's explicit limits take precedence.
Detailed technical explanation
How to think about this question
ResourceQuota enforces aggregate resource consumption at the namespace level, while LimitRange sets per-container defaults and min/max constraints. When both are present, the Pod must pass both admission checks: the ResourceQuota checks that the sum of all Pod limits in the namespace does not exceed the quota, and the LimitRange only applies defaults or min/max if the container omits those fields. A common subtlety is that LimitRange can also define 'maxLimitRequestRatio' constraints, but in this scenario only defaults are set, so no ratio enforcement occurs.
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 will be admitted because it respects both the ResourceQuota and the LimitRange — B is correct because the Pod explicitly sets its own limits (cpu: 4, memory: 8Gi) and requests (cpu: 2, memory: 4Gi), which are within the ResourceQuota's 'limits.cpu: 4' and 'limits.memory: 8Gi' constraints. The LimitRange default limits only apply to containers that do not specify limits; since this Pod specifies limits, the defaults are ignored. The Pod is admitted as it satisfies both admission controllers.
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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