DVA-C02 Security Practice Question
A developer is creating a new IAM policy to allow users to list objects in a specific S3 bucket. The policy must follow the principle of least privilege. Which policy statement should the developer use?
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","Action":"s3:ListBucket","Resource":"arn:aws:s3:::example-bucket"}
It grants s3:ListBucket on the specific bucket. Option A is wrong because it grants s3:ListAllMyBuckets which lists all buckets, not just the specific one. Option C is wrong because s3:PutObject is for uploading objects, not listing. Option D is wrong because s3:GetObject is for reading objects, not listing.
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","Action":"s3:ListAllMyBuckets","Resource":"*"}
Why it's wrong here
It grants s3:ListAllMyBuckets which lists all buckets, not just the specific one.
- ✓
{"Effect":"Allow","Action":"s3:ListBucket","Resource":"arn:aws:s3:::example-bucket"}
Why this is correct
It grants s3:ListBucket on the specific bucket.
- ✗
{"Effect":"Allow","Action":"s3:PutObject","Resource":"arn:aws:s3:::example-bucket/*"}
Why it's wrong here
S3:PutObject is for uploading objects, not listing.
- ✗
{"Effect":"Allow","Action":"s3:GetObject","Resource":"arn:aws:s3:::example-bucket/*"}
Why it's wrong here
S3:GetObject is for reading objects, not listing.
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 DVA-C02 practice question is part of Courseiva's free Amazon Web Services 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 DVA-C02 exam.