KCSA Kubernetes Cluster Component Security Practice Question
Which THREE of the following criteria should be evaluated when reviewing Kubernetes RBAC policies to ensure least privilege? (Choose THREE)
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
✓
Carefully audit permissions that allow impersonation or binding of roles.
RBAC reviews should check for overly broad resource permissions, dangerous verbs like 'impersonate' or 'bind', and cluster-wide bindings.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Carefully audit permissions that allow impersonation or binding of roles.
Why this is correct
Impersonation and role binding permissions can allow privilege escalation.
- ✓
Limit the use of cluster-scoped ClusterRoleBindings to cases where namespace-scoped Roles are insufficient.
Why this is correct
Cluster-wide bindings increase the impact of a compromised account.
- ✗
Ensure anonymous users have write access to all namespaces.
Why it's wrong here
Anonymous write access allows anyone to destroy the cluster.
- ✓
Avoid granting wildcard permissions (*) on sensitive resources like secrets or cluster roles.
Why this is correct
Wildcards grant excessive access, violating least privilege.
- ✗
Grant cluster-admin permissions to every service account by default.
Why it's wrong here
This is a severe security misconfiguration.
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 |
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CNCF / Linux Foundation exam blueprint
This KCSA practice question is part of Courseiva's free CNCF / Linux Foundation 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 KCSA exam.