EX280 User And RBAC Management Practice Question
An administrator needs to view which users currently possess the 'cluster-admin' cluster role across the OpenShift cluster. Which command is most efficient for displaying this information?
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
✓
oc describe clusterrolebinding cluster-admin
The 'oc adm policy who-can' command or inspecting the ClusterRoleBinding for cluster-admin reveals which users and service accounts hold the role.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
oc auth can-i --list --all-namespaces
Why it's wrong here
Incorrect. This command shows what the current logged-in user can do, not list all users assigned to a specific role.
- ✗
oc get clusterroles cluster-admin -o jsonpath='{.subjects}'
Why it's wrong here
Incorrect. ClusterRole objects themselves do not contain a subjects field; subjects are defined in RoleBindings or ClusterRoleBindings.
- ✓
oc describe clusterrolebinding cluster-admin
Why this is correct
Correct. The cluster-admin ClusterRoleBinding explicitly lists all subjects (users, groups, service accounts) bound to the cluster-admin role.
- ✗
oc get users --selector=role=cluster-admin
Why it's wrong here
Incorrect. OpenShift User objects do not use labels to store their assigned RBAC roles.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Red Hat exam blueprint
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