KCSA Overview OF Cloud Native Security Practice Question
A security engineer is designing a defense-in-depth strategy for a cloud native application deployment. Which of the following best exemplifies the 'defense-in-depth' principle across the 4Cs layers?
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
✓
Implementing security controls at every layer from Code to Cloud so that a compromise at one layer does not result in total system failure.
Defense-in-depth relies on multiple layers of security so that if one layer fails, subsequent layers provide protection (e.g., secure code, hardened container images, RBAC-secured clusters, and encrypted cloud storage).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Granting cluster-admin permissions to all developers to ensure rapid troubleshooting.
Why it's wrong here
Over-privileged access violates the principle of least privilege, weakening security.
- ✗
Disabling authentication mechanisms to reduce operational overhead.
Why it's wrong here
Disabling authentication completely compromises access control.
- ✗
Applying strong firewall rules only at the perimeter of the corporate network.
Why it's wrong here
Relying solely on a perimeter firewall violates defense-in-depth by lacking internal controls.
- ✓
Implementing security controls at every layer from Code to Cloud so that a compromise at one layer does not result in total system failure.
Why this is correct
Defense-in-depth across the 4Cs ensures overlapping security controls across Code, Container, Cluster, and Cloud.
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
One of 320 original KCSA practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
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.