This CKS practice question tests your understanding of cluster setup and hardening. 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.
An administrator wants to restrict a service account to only be able to create pods in the 'development' namespace. Which RBAC configuration should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a Role in the 'development' namespace and a RoleBinding that binds the service account to that Role.
Option B is correct because a Role is namespace-scoped and can only grant permissions within the namespace where it is created. By creating a Role in the 'development' namespace and binding the service account to it via a RoleBinding, the service account is restricted to creating pods only in that namespace, as required.
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.
✗
Create a Role in the default namespace and a RoleBinding that binds the service account to that Role.
Why it's wrong here
The Role must be in the 'development' namespace, not default.
✓
Create a Role in the 'development' namespace and a RoleBinding that binds the service account to that Role.
Why this is correct
Role and RoleBinding are namespaced and provide the correct scoping.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create a ClusterRole and a ClusterRoleBinding that binds the service account to that ClusterRole.
Why it's wrong here
ClusterRoleBinding grants permissions cluster-wide, which is too broad.
✗
Create a ClusterRole and a RoleBinding in the 'development' namespace.
Why it's wrong here
A ClusterRole can be used with a RoleBinding, but the simplest approach is a Role directly.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CNCF often tests the distinction between Role and ClusterRole scoping, and the trap here is that candidates may incorrectly choose a ClusterRole with a RoleBinding (Option D) thinking it restricts to a namespace, but the ClusterRole itself may grant broader permissions or include cluster-scoped resources, violating the principle of least privilege.
Detailed technical explanation
How to think about this question
In Kubernetes RBAC, a Role defines permissions within a single namespace, while a ClusterRole can define permissions cluster-wide or for specific namespaces when used with a RoleBinding. The RoleBinding binds a subject (like a service account) to a Role or ClusterRole, but the effective permissions are scoped to the namespace of the RoleBinding if the role is a ClusterRole (only for non-cluster-scoped resources). For namespace-specific restrictions, a Role is the correct choice because it inherently limits permissions to that namespace, avoiding accidental escalation. In real-world scenarios, this pattern is used to enforce least privilege for CI/CD pipelines or application service accounts.
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 CKS 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 CKS question in full detail.
Cluster Setup and Hardening — This question tests Cluster Setup and Hardening — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a Role in the 'development' namespace and a RoleBinding that binds the service account to that Role. — Option B is correct because a Role is namespace-scoped and can only grant permissions within the namespace where it is created. By creating a Role in the 'development' namespace and binding the service account to it via a RoleBinding, the service account is restricted to creating pods only in that namespace, as required.
What should I do if I get this CKS 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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