DEA-C01 Data Security and Governance Practice Question
Exhibit
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": "s3:*",
"Resource": "*"
}
]
}Refer to the exhibit. An IAM policy is attached to a user. What is the security implication of this policy?
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
✓
The policy grants excessive permissions, violating least privilege.
The policy, which grants full S3 access to all resources, violates the principle of least privilege by providing excessive permissions. Option A is incorrect because the policy does not only allow read access; it allows all actions. Option B is incorrect because the use of asterisks is valid syntax in IAM policies. Option C is incorrect because the policy is overly permissive, not restrictive.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The policy only allows read access.
Why it's wrong here
It allows all actions including write and delete.
- ✗
The policy is invalid because it uses asterisks.
Why it's wrong here
Asterisks are allowed in IAM policies.
- ✗
The policy is too restrictive.
Why it's wrong here
It allows all S3 actions on all resources.
- ✓
The policy grants excessive permissions, violating least privilege.
Why this is correct
It grants full S3 access to all resources.
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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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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