SAP-C02 Design for New Solutions Practice Question
Exhibit
Refer to the exhibit.
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Deny",
"Action": "s3:PutObject",
"Resource": "arn:aws:s3:::example-bucket/*",
"Condition": {
"StringNotEquals": {
"s3:x-amz-server-side-encryption": "AES256"
}
}
},
{
"Effect": "Allow",
"Action": "s3:PutObject",
"Resource": "arn:aws:s3:::example-bucket/*",
"Condition": {
"StringEquals": {
"s3:x-amz-server-side-encryption": "AES256"
}
}
}
]
}Refer to the exhibit. A company has an S3 bucket policy that requires server-side encryption with AES256 for all objects uploaded. However, users can still upload objects without encryption. What is the MOST likely reason?
⚠ Common exam trap
Candidates often assume a policy with a `Condition` that requires encryption is sufficient, but without an explicit `Deny` for requests that omit the header, the policy is only a 'soft' requirement and does not block unencrypted uploads.
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 does not deny requests that omit the encryption header
The bucket policy only requires encryption but does not explicitly deny requests that omit the `x-amz-server-side-encryption` header. Without a `Deny` effect for requests lacking the header, the policy is effectively a statement of intent rather than an enforcement mechanism. S3 bucket policies can enforce encryption by using a `Deny` statement with a condition key like `s3:x-amz-server-side-encryption` set to `AES256`.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
S3 bucket policies cannot enforce encryption; you must use bucket default encryption
Why it's wrong here
Bucket policies can enforce encryption via conditions.
- ✗
The condition key is incorrect; it should be s3:x-amz-server-side-encryption-aws-kms-key-id
Why it's wrong here
The condition key is correct for AES256.
- ✗
The policy does not apply to objects uploaded using AWS KMS managed keys
Why it's wrong here
AES256 is SSE-S3, not KMS.
- ✓
The policy does not deny requests that omit the encryption header
Why this is correct
If no encryption header is present, the condition evaluates to false, so Deny does not apply.
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 SAP-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 SAP-C02 exam.