DEA-C01 Data Ingestion and Transformation Practice Question
Exhibit
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:PutObject",
"s3:GetObject"
],
"Resource": "arn:aws:s3:::example-bucket/*"
}
]
}Refer to the exhibit. A data engineer is setting up an Amazon Kinesis Data Firehose delivery stream that writes to an S3 bucket named 'example-bucket'. The IAM role assumed by Firehose has the attached policy shown. When testing, the Firehose delivery stream fails with an access denied error. What is the most likely cause?
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 IAM policy is missing the s3:AbortMultipartUpload and s3:ListBucket actions.
Kinesis Data Firehose requires the s3:AbortMultipartUpload and s3:ListBucket permissions in addition to s3:PutObject to successfully write data to an S3 bucket. The IAM policy shown only grants s3:PutObject and s3:GetObject, so without these missing actions, the delivery stream fails with access denied. Option A is incorrect because enabling server-side encryption on the S3 bucket does not inherently cause access denial if the IAM role has the necessary permissions; the issue here is the missing S3 actions. Option B is incorrect because the policy does not involve KMS keys, and the error is not related to encryption key access. Option C is incorrect because there is no indication that the bucket policy explicitly denies the Firehose service principal; the problem is the IAM role's insufficient permissions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The S3 bucket has server-side encryption enabled that needs additional permissions.
Why it's wrong here
No encryption is shown in the exhibit.
- ✗
The IAM role does not have permission to use AWS KMS keys.
Why it's wrong here
No KMS key is referenced.
- ✗
The bucket policy denies access from the Firehose service principal.
Why it's wrong here
No bucket policy is shown.
- ✓
The IAM policy is missing the s3:AbortMultipartUpload and s3:ListBucket actions.
Why this is correct
Firehose uses multipart uploads and needs these permissions.
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 DEA-C01 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 DEA-C01 exam.