CV0-004 Security Practice Question
A security engineer is configuring an AWS IAM policy for a new application. The policy must allow the application to read objects from a specific S3 bucket. Which IAM policy element determines whether the action is allowed or denied?
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
✓
Effect
The Effect element in an IAM policy specifies whether the policy allows or denies the requested action.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Effect
Why this is correct
Effect is set to 'Allow' or 'Deny' to permit or block the action.
- ✗
Action
Why it's wrong here
Action specifies which operations are allowed or denied, but the Effect determines the outcome.
- ✗
Resource
Why it's wrong here
Resource specifies the AWS resources, not allow/deny.
- ✗
Condition
Why it's wrong here
Condition adds restrictions but does not determine allow/deny.
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 |
Go deeper
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 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 CV0-004 exam.