DEA-C01 Data Operations and Support Practice Question

Exhibit

Refer to the exhibit.
```
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "lambda:InvokeFunction"
      ],
      "Resource": [
        "arn:aws:lambda:us-east-1:123456789012:function:my-function"
      ]
    },
    {
      "Effect": "Allow",
      "Action": [
        "kinesis:DescribeStream",
        "kinesis:GetRecords",
        "kinesis:GetShardIterator",
        "kinesis:ListShards"
      ],
      "Resource": [
        "arn:aws:kinesis:us-east-1:123456789012:stream/my-stream"
      ]
    }
  ]
}
```

Refer to the exhibit. A data engineer is configuring an AWS Lambda function to process records from a Kinesis stream. The function is set up with an event source mapping, but no records are being processed. The Lambda function's IAM role has the policy shown. What is the most likely reason for the issue?

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 does not include all the necessary Kinesis actions for the event source mapping to work.

The IAM policy attached to the Lambda function's execution role is missing key Kinesis actions required for the event source mapping to operate. Specifically, while the policy includes kinesis:DescribeStream and kinesis:GetRecords, it lacks kinesis:GetShardIterator and kinesis:ListShards. These actions are necessary for the Lambda service to poll the stream, retrieve shard iterators, and process records. Without them, the event source mapping cannot read from the Kinesis stream, resulting in no records being processed. Therefore, option B is correct: the policy does not include all necessary Kinesis actions.

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 policy does not grant permission to describe the Kinesis stream.
Why it's wrong here
It includes kinesis:DescribeStream.
✓
The IAM policy does not include all the necessary Kinesis actions for the event source mapping to work.
Why this is correct
Missing kinesis:ListShards action.
✗
The policy includes too many actions, which causes a conflict.
Why it's wrong here
Too many actions do not cause issues.
✗
The resource ARN for the Lambda function in the policy is incorrect.
Why it's wrong here
The Lambda function ARN is correct.

Quick reference

Cloud Service Model Comparison

Model	You Manage	Provider Manages	Examples
IaaS	OS, runtime, apps, data	Hardware, hypervisor, networking	EC2, Azure VMs, GCP Compute Engine
PaaS	Apps and data	OS, runtime, middleware, hardware	Elastic Beanstalk, Azure App Service
SaaS	Data and settings only	Everything else	Microsoft 365, Salesforce, Workday
FaaS / Serverless	Function code only	Infra, scaling, runtime	Lambda, Azure Functions, Cloud Run
CaaS	Containers and apps	Kubernetes, OS, hardware	EKS, AKS, GKE

Go deeper

DEA-C01 Data Operations and Support Practice Question

Exhibit

Why each option matters

Option-by-option breakdown

Cloud Service Model Comparison

Related to this question