CKA Practice Question: Cluster Architecture, Installation and Configuration
This CKA practice question tests your understanding of cluster architecture, installation and configuration. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 developer created a ClusterRole named 'pod-reader' with rules to get and list pods. They created a ClusterRoleBinding 'read-pods-global' binding this ClusterRole to a service account 'sa-pod-reader' in the 'default' namespace. Which of the following is true about the permissions of this service account?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The service account can read pods in all namespaces
ClusterRoleBindings are cluster-scoped, meaning they grant permissions across all namespaces. Since the ClusterRoleBinding 'read-pods-global' binds the 'pod-reader' ClusterRole to the service account 'sa-pod-reader', the service account can get and list pods in every namespace, not just the 'default' namespace.
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 service account can only read pods in the 'default' namespace
Why it's wrong here
With a ClusterRoleBinding, the permissions are cluster-scoped, not limited to a namespace.
✓
The service account can read pods in all namespaces
Why this is correct
A ClusterRoleBinding grants the ClusterRole's permissions across all namespaces.
Related concept
Read the scenario before looking for a memorised answer.
✗
The service account can only list pods, not get them
Why it's wrong here
The ClusterRole includes both 'get' and 'list' verbs.
✗
The service account cannot read pods in any namespace
Why it's wrong here
The binding grants permissions, so the service account can read pods.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse ClusterRoleBindings with RoleBindings, mistakenly thinking the service account's permissions are limited to the namespace where the binding or the service account is defined.
Detailed technical explanation
How to think about this question
In Kubernetes, RoleBindings are namespaced and grant permissions only within that namespace, while ClusterRoleBindings are non-namespaced and grant permissions across all namespaces. A ClusterRole can also be used with a RoleBinding to limit its scope to a specific namespace, but here the use of a ClusterRoleBinding explicitly extends the permissions globally. This distinction is critical for multi-tenant clusters where namespace isolation is required.
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 CKA 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 CKA question in full detail.
Cluster Architecture, Installation and Configuration — This question tests Cluster Architecture, Installation and Configuration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The service account can read pods in all namespaces — ClusterRoleBindings are cluster-scoped, meaning they grant permissions across all namespaces. Since the ClusterRoleBinding 'read-pods-global' binds the 'pod-reader' ClusterRole to the service account 'sa-pod-reader', the service account can get and list pods in every namespace, not just the 'default' namespace.
What should I do if I get this CKA 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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