This CKS practice question tests your understanding of cluster setup and hardening. 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.
Which TWO resources can be used to implement RBAC in Kubernetes?
ClusterRole
ClusterRole defines cluster-scoped permissions or can be used in namespaces.
NetworkPolicy
Why wrong: NetworkPolicy is for network traffic control.
PodSecurityPolicy
Why wrong: PodSecurityPolicy is deprecated and not for RBAC.
ServiceAccount
Why wrong: ServiceAccount is an identity, not a RBAC resource.
Role
Role defines permissions within a namespace.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
ClusterRole
A is correct because ClusterRole is a Kubernetes RBAC resource that defines a set of permissions (rules) that are not namespaced, allowing cluster-wide access. RBAC in Kubernetes uses Role and ClusterRole objects to specify allowed verbs (e.g., get, list, create) on resources (e.g., pods, secrets), and they are bound to subjects via RoleBinding or ClusterRoleBinding.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
ClusterRole
Why this is correct
ClusterRole defines cluster-scoped permissions or can be used in namespaces.
Related concept
Read the scenario before looking for a memorised answer.
NetworkPolicy
Why it's wrong here
NetworkPolicy is for network traffic control.
PodSecurityPolicy
Why it's wrong here
PodSecurityPolicy is deprecated and not for RBAC.
ServiceAccount
Why it's wrong here
ServiceAccount is an identity, not a RBAC resource.
Role
Why this is correct
Role defines permissions within a namespace.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
CNCF often tests the distinction between RBAC authorization resources (Role/ClusterRole) and other Kubernetes objects that deal with security but serve different purposes, such as NetworkPolicy (network segmentation) or PodSecurityPolicy (pod security constraints), leading candidates to confuse authorization with other security controls.
Detailed technical explanation
RBAC in Kubernetes is implemented via the rbac.authorization.k8s.io API group, which defines four core objects: Role, ClusterRole, RoleBinding, and ClusterRoleBinding. A Role or ClusterRole contains rules that specify API groups, resources, and verbs; for example, a ClusterRole can grant access to nodes or persistent volumes across all namespaces. The binding objects link these roles to subjects (users, groups, or ServiceAccounts), and the API server evaluates these bindings at request time to determine if an action is allowed.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Cluster Setup and Hardening — This question tests Cluster Setup and Hardening — Read the scenario before looking for a memorised answer..
The correct answer is: ClusterRole — A is correct because ClusterRole is a Kubernetes RBAC resource that defines a set of permissions (rules) that are not namespaced, allowing cluster-wide access. RBAC in Kubernetes uses Role and ClusterRole objects to specify allowed verbs (e.g., get, list, create) on resources (e.g., pods, secrets), and they are bound to subjects via RoleBinding or ClusterRoleBinding.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 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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