MLS-C01 IAM Role Practice Question
A company uses SageMaker to train a model each night. The training data is stored in an S3 bucket with SSE-S3 encryption. The training job fails with an access denied error. Which configuration is needed?
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
✓
Create an IAM role with S3 read access and assign it to the SageMaker training job
The training job fails because SageMaker does not have the necessary permissions to read the data from S3. The solution is to create an IAM role with S3 read access (s3:GetObject) and assign it to the SageMaker training job. Option A is incorrect because VPC endpoints are not required for this error and are unrelated to encryption. Option C is incorrect because SSE-S3 encryption is already enabled and does not require KMS. Option D is incorrect because a bucket policy allowing all principals is insecure and not the proper way to grant permissions to SageMaker.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure the training job to run in a VPC with S3 VPC Endpoint
Why it's wrong here
Addresses network access, not IAM permissions.
- ✓
Create an IAM role with S3 read access and assign it to the SageMaker training job
Why this is correct
SageMaker needs a role with permissions to read S3 data.
- ✗
Enable SSE-KMS on the S3 bucket
Why it's wrong here
SSE-S3 already used; KMS not needed.
- ✗
Add a bucket policy allowing s3:GetObject for all principals
Why it's wrong here
Too permissive and does not address IAM role.
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 MLS-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 MLS-C01 exam.