DEA-C01 Data Ingestion and Transformation Practice Question

Exhibit

Refer to the exhibit.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "s3:PutObject",
        "s3:GetObject"
      ],
      "Resource": "arn:aws:s3:::my-bucket/*"
    },
    {
      "Effect": "Allow",
      "Action": [
        "kinesis:PutRecord",
        "kinesis:PutRecords"
      ],
      "Resource": "arn:aws:kinesis:us-east-1:123456789012:stream/my-stream"
    }
  ]
}

Refer to the exhibit. A data engineer is attaching this IAM policy to an IAM role used by an AWS Glue job. The job reads from a Kinesis Data Streams stream and writes transformed data to an S3 bucket. When the job runs, it fails with an AccessDenied error for the Kinesis stream. What is the MOST likely cause?

⚠ Common exam trap

Many exam-takers assume only data-plane actions like `GetRecords` are needed for reading, forgetting that the Glue job's underlying KCL requires the control-plane `DescribeStream` action to discover shard topology before it can read any data.

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 'kinesis:DescribeStream' action.

When an AWS Glue job reads from Kinesis Data Streams, it requires the `kinesis:DescribeStream` action to retrieve stream metadata such as shard IDs and the stream's current state. Without this permission, the Glue job cannot discover the stream's shards and fails with an AccessDenied error, even if other Kinesis actions like `GetRecords` are allowed. The error occurs because the IAM policy attached to the Glue role is missing this prerequisite action.

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 stream ARN in the policy is incorrect.
Why it's wrong here
ARN format is correct.
✓
The IAM policy is missing the 'kinesis:DescribeStream' action.
Why this is correct
Required to read stream metadata.
✗
The Glue job does not have permissions to call 'kinesis:PutRecord'.
Why it's wrong here
Job reads, not writes, to Kinesis.
✗
The S3 bucket policy blocks the PutObject action from the Glue role.
Why it's wrong here
Error is on Kinesis, not S3.

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 Ingestion and Transformation Practice Question

Exhibit

Why each option matters

Option-by-option breakdown

AWS S3 Storage Class Comparison

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