CLO-002 Governance Risk Compliance And Security Practice Question
After a security incident, it is discovered that a S3 bucket was publicly accessible. Which feature should be used to prevent this from happening in the future?
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
✓
S3 Block Public Access
S3 Block Public Access is a setting that overrides bucket-level permissions to prevent public exposure.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Access Control Lists (ACLs)
Why it's wrong here
ACLs are legacy permissions that are often the cause of accidental public exposure.
- ✓
S3 Block Public Access
Why this is correct
This feature provides a centralized control to prevent public access regardless of individual bucket policies.
- ✗
IAM User Policies
Why it's wrong here
IAM policies define what a user can do, not the bucket's public accessibility state.
- ✗
Bucket Policy
Why it's wrong here
A policy can be misconfigured; Block Public Access is a global security setting that prevents misconfiguration.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
About these practice questions
This CLO-002 question is part of Courseiva's 211-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. 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 CompTIA exam blueprint
This CLO-002 practice question is part of Courseiva's free CompTIA 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 CLO-002 exam.