DEA-C01 Data Store Management Practice Question
Exhibit
Refer to the exhibit.
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"AWS": "arn:aws:iam::123456789012:role/DataLakeRole"
},
"Action": [
"s3:GetObject",
"s3:PutObject"
],
"Resource": "arn:aws:s3:::example-bucket/*"
},
{
"Effect": "Deny",
"Principal": "*",
"Action": "s3:*",
"Resource": "arn:aws:s3:::example-bucket/*",
"Condition": {
"Bool": {
"aws:SecureTransport": "false"
}
}
}
]
}Refer to the exhibit. A data engineer has attached this bucket policy to an S3 bucket. What is the effect of this policy?
⚠ Common exam trap
AWS often tests the distinction between encryption in transit (HTTPS/TLS) and encryption at rest (SSE), leading candidates to confuse the `aws:SecureTransport` condition with server-side encryption requirements.
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
✓
It allows the DataLakeRole to read and write objects, but only over HTTPS.
The bucket policy uses a condition key `aws:SecureTransport` set to `true`, which restricts access to HTTPS (TLS) connections only. The `Principal` is `DataLakeRole`, and the `Action` includes `s3:GetObject` and `s3:PutObject`, so the policy allows that role to read and write objects exclusively over HTTPS, enforcing encrypted data in transit.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It enforces server-side encryption for all objects written to the bucket.
Why it's wrong here
The policy does not mention SSE; it only requires HTTPS.
- ✓
It allows the DataLakeRole to read and write objects, but only over HTTPS.
Why this is correct
The allow statement grants GetObject and PutObject to the role; the deny statement blocks non-HTTPS requests for everyone.
- ✗
It allows anonymous access to the bucket for HTTPS requests.
Why it's wrong here
The policy does not grant any permissions to anonymous principals.
- ✗
It denies all access to the bucket except for requests from the DataLakeRole.
Why it's wrong here
The policy allows the DataLakeRole, but the deny statement only applies to non-HTTPS requests, not all requests.
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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