- A
kubectl get clusterrolebinding
Why wrong: Incorrect. The singular form 'clusterrolebinding' is not a valid resource name for listing resources; kubectl requires the plural form.
- B
kubectl get clusterrolebindings
Correct. 'clusterrolebindings' is the plural form of the resource, which is required for the kubectl get command.
- C
kubectl get clusterrolebindings.rbac.authorization.k8s.io
Why wrong: Incorrect. While 'clusterrolebindings.rbac.authorization.k8s.io' is technically valid, the standard and simplest command is 'kubectl get clusterrolebindings'. The question expects the most straightforward command.
- D
kubectl get clusterrolebinding --all-namespaces
Why wrong: Incorrect. The '--all-namespaces' flag is unnecessary for cluster-scoped resources like ClusterRoleBindings and may cause confusion, though it doesn't produce an error.
How to List All ClusterRoleBindings in Kubernetes
This CKS practice question tests your understanding of cluster setup and hardening. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: clusterRoleBinding. 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 are auditing RBAC and find a ClusterRoleBinding that grants cluster-admin to a service account. Which command should you run to list all ClusterRoleBindings in the cluster?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"which command"Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
kubectl get clusterrolebindings
The correct command to list all ClusterRoleBindings in the cluster is `kubectl get clusterrolebindings` (option B). This uses the plural form of the resource name, which is required for listing. Option A uses the singular form 'clusterrolebinding', which will produce an error. Option C uses the fully qualified resource name 'clusterrolebindings.rbac.authorization.k8s.io', which is also valid but not the simplest or most common command; the question asks for the correct command, and B is the standard. Option D adds the '--all-namespaces' flag, which is unnecessary for cluster-scoped resources and may cause confusion, but it is not technically incorrect; however, it is not the recommended command.
Key principle: ClusterRoleBinding
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
kubectl get clusterrolebinding
Why it's wrong here
Incorrect. The singular form 'clusterrolebinding' is not a valid resource name for listing resources; kubectl requires the plural form.
- ✓
kubectl get clusterrolebindings
Why this is correct
Correct. 'clusterrolebindings' is the plural form of the resource, which is required for the kubectl get command.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
ClusterRoleBinding
- ✗
kubectl get clusterrolebindings.rbac.authorization.k8s.io
Why it's wrong here
Incorrect. While 'clusterrolebindings.rbac.authorization.k8s.io' is technically valid, the standard and simplest command is 'kubectl get clusterrolebindings'. The question expects the most straightforward command.
- ✗
kubectl get clusterrolebinding --all-namespaces
Why it's wrong here
Incorrect. The '--all-namespaces' flag is unnecessary for cluster-scoped resources like ClusterRoleBindings and may cause confusion, though it doesn't produce an error.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common trap is thinking the singular form 'clusterrolebinding' works or that '--all-namespaces' is needed for cluster-scoped resources. Only the plural form 'clusterrolebindings' is correct for listing.
Trap categories for this question
Similar concept trap
Incorrect. The '--all-namespaces' flag is unnecessary for cluster-scoped resources like ClusterRoleBindings and may cause confusion, though it doesn't produce an error.
Command / output trap
Incorrect. While 'clusterrolebindings.rbac.authorization.k8s.io' is technically valid, the standard and simplest command is 'kubectl get clusterrolebindings'. The question expects the most straightforward command.
Detailed technical explanation
How to think about this question
ClusterRoleBindings are cluster-scoped RBAC resources that bind a ClusterRole to subjects (users, groups, or service accounts) across all namespaces. The kubectl command uses the plural resource name `clusterrolebindings` (or the fully qualified `clusterrolebindings.rbac.authorization.k8s.io`) to list them; the `--all-namespaces` flag is only meaningful for namespaced resources like RoleBindings. In real-world audits, listing ClusterRoleBindings is critical to identify overly permissive bindings, such as a service account granted cluster-admin, which could be a security risk.
KKey Concepts to Remember
- ClusterRoleBinding
- kubectl get
- Resource Naming
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
ClusterRoleBinding
Real-world example
How this comes up in practice
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
What to study next
Got this wrong? Here's your next step.
Review clusterRoleBinding, then practise related CKS questions on the same topic to reinforce the concept.
- →
Cluster Setup and Hardening — study guide chapter
Learn the concepts, then practise the questions
- →
Cluster Setup and Hardening practice questions
Targeted practice on this topic area only
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Certified Kubernetes Security Specialist CKS study guide
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FAQ
Questions learners often ask
What does this CKS question test?
Cluster Setup and Hardening — This question tests Cluster Setup and Hardening — ClusterRoleBinding.
What is the correct answer to this question?
The correct answer is: kubectl get clusterrolebindings — The correct command to list all ClusterRoleBindings in the cluster is `kubectl get clusterrolebindings` (option B). This uses the plural form of the resource name, which is required for listing. Option A uses the singular form 'clusterrolebinding', which will produce an error. Option C uses the fully qualified resource name 'clusterrolebindings.rbac.authorization.k8s.io', which is also valid but not the simplest or most common command; the question asks for the correct command, and B is the standard. Option D adds the '--all-namespaces' flag, which is unnecessary for cluster-scoped resources and may cause confusion, but it is not technically incorrect; however, it is not the recommended command.
What should I do if I get this CKS question wrong?
Review clusterRoleBinding, then practise related CKS questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
What is the key concept behind this question?
ClusterRoleBinding
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Last reviewed: Jun 24, 2026
This CKS practice question is part of Courseiva's free CNCF certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CKS exam.
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