CKAD Practice Question: Application Environment, Configuration and Security
This CKAD practice question tests your understanding of application environment, configuration and security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 namespace 'team-a' has a ResourceQuota with 'pods: 10' and a LimitRange with default memory request '256Mi'. A user creates a pod with no resource requests. What happens?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Pod is created with a default memory request of 256Mi.
When a pod is created in a namespace with a LimitRange that specifies a default memory request, Kubernetes automatically injects that default value into the pod's container spec if no explicit memory request is provided. The ResourceQuota of 'pods: 10' only limits the total number of pods, not the resource consumption of individual pods, so it does not affect this pod's creation. Therefore, the pod is created with a default memory request of 256Mi.
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.
✓
Pod is created with a default memory request of 256Mi.
Why this is correct
LimitRange applies default resource requests to pods that don't specify them.
Related concept
Read the scenario before looking for a memorised answer.
✗
Pod creation fails because the ResourceQuota is exceeded.
Why it's wrong here
The ResourceQuota limit of 10 pods would not be exceeded by creating one pod.
✗
Pod creation fails because the LimitRange is not satisfied.
Why it's wrong here
LimitRange provides defaults, not constraints that cause failure.
✗
Pod is created with no memory request.
Why it's wrong here
LimitRange overrides and sets a default request.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse ResourceQuota (which limits total resource consumption) with LimitRange (which sets per-pod defaults and constraints), leading them to incorrectly assume a quota or limit violation when defaults are applied.
Detailed technical explanation
How to think about this question
Under the hood, the LimitRange admission controller intercepts pod creation requests and mutates the pod spec to include default resource requests and limits as defined in the LimitRange object. This mutation occurs before the pod is persisted in etcd, ensuring that all pods in the namespace have at least the minimum resource guarantees. In a real-world scenario, this prevents pods from being scheduled on nodes with insufficient memory, as the scheduler uses the request values for bin-packing decisions.
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: Pod is created with a default memory request of 256Mi. — When a pod is created in a namespace with a LimitRange that specifies a default memory request, Kubernetes automatically injects that default value into the pod's container spec if no explicit memory request is provided. The ResourceQuota of 'pods: 10' only limits the total number of pods, not the resource consumption of individual pods, so it does not affect this pod's creation. Therefore, the pod is created with a default memory request of 256Mi.
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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