DEA-C01 Data Security and Governance Practice Question
A company wants to grant read-only access to an S3 bucket for a data analyst. The analyst should be able to list objects and read object content. Which IAM policy effect and action combination is correct?
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: Allow, Actions: s3:ListBucket, s3:GetObject
S3:ListBucket allows listing objects in the bucket, and s3:GetObject allows reading object content. This combination provides read-only access. Option A is incorrect because s3:DeleteObject grants delete permissions. Option B is incorrect because s3:ListAllMyBuckets lists all buckets, not bucket contents. Option C is incorrect because s3:PutObject grants write access.
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: Allow, Actions: s3:GetObject, s3:DeleteObject
Why it's wrong here
DeleteObject is not read-only.
- ✗
Effect: Allow, Actions: s3:ListAllMyBuckets, s3:GetObject
Why it's wrong here
ListAllMyBuckets lists all buckets, not objects within a specific bucket.
- ✗
Effect: Allow, Actions: s3:PutObject, s3:GetObject
Why it's wrong here
PutObject allows write, which is not read-only.
- ✓
Effect: Allow, Actions: s3:ListBucket, s3:GetObject
Why this is correct
Provides read-only access to list and read objects.
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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