DEA-C01 Data Security and Governance Practice Question

Exhibit

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Deny",
      "Principal": "*",
      "Action": "s3:PutObject",
      "Resource": "arn:aws:s3:::example-bucket/*",
      "Condition": {
        "StringNotEquals": {
          "s3:x-amz-server-side-encryption": "aws:kms"
        }
      }
    }
  ]
}

Refer to the exhibit. A data engineer applies the following S3 bucket policy to an S3 bucket. What does this policy enforce?

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

✓

Requires that all objects uploaded to the bucket be encrypted with SSE-KMS

The bucket policy uses a Deny effect with a condition that checks if the s3:x-amz-server-side-encryption header is not 'aws:kms'. This means any PutObject request that does not use SSE-KMS will be denied. Therefore, the policy enforces that all objects uploaded must be encrypted with SSE-KMS. Option A is incorrect because the policy does not mention SSE-S3; it denies if not SSE-KMS. Option B is incorrect because it requires SSE-KMS, not SSE-S3. Option C is incorrect because the policy only allows SSE-KMS, not any type of server-side encryption. Option D is correct.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
Denies all uploads unless SSE-S3 is used
Why it's wrong here
Condition is for SSE-KMS.
✗
Allows only SSE-S3 encrypted uploads
Why it's wrong here
The condition requires aws:kms, not AES256.
✗
Allows any type of server-side encryption
Why it's wrong here
Denies if not KMS.
✓
Requires that all objects uploaded to the bucket be encrypted with SSE-KMS
Why this is correct
Denies PutObject if encryption header is not KMS.

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

DEA-C01 Data Security and Governance Practice Question

Exhibit

Why each option matters

Option-by-option breakdown

AWS S3 Storage Class Comparison

Related to this question