MLS-C01 Exploratory Data Analysis Practice Question
Exhibit
{"Version": "2012-10-17", "Statement": [{"Effect": "Allow", "Action": ["s3:GetObject"], "Resource": "arn:aws:s3:::my-bucket/*"}, {"Effect": "Allow", "Action": ["sagemaker:CreateProcessingJob"], "Resource": "*"}]}Refer to the exhibit. A data scientist is using an IAM role with this policy to run a SageMaker processing job that reads data from S3. The job fails with an access 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 policy does not allow s3:ListBucket
The processing job needs both s3:GetObject and s3:ListBucket to read objects. The policy lacks s3:ListBucket. Option A is wrong because sagemaker:CreateProcessingJob is allowed. Option B is wrong because s3:PutObject is not needed for reading. Option D is wrong because the policy allows s3:GetObject.
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 allow sagemaker:CreateProcessingJob
Why it's wrong here
It is allowed.
- ✗
The policy does not allow s3:PutObject
Why it's wrong here
PutObject is not needed for reading.
- ✓
The policy does not allow s3:ListBucket
Why this is correct
ListBucket is required to list objects in the bucket.
- ✗
The policy does not allow s3:GetObject
Why it's wrong here
It is allowed.
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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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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