MLS-C01 Data Engineering Practice Question
Exhibit
Refer to the exhibit.
IAM policy:
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:GetObject",
"s3:PutObject"
],
"Resource": "arn:aws:s3:::my-data-lake/*"
},
{
"Effect": "Allow",
"Action": [
"glue:StartJobRun",
"glue:GetJobRun"
],
"Resource": "*"
},
{
"Effect": "Allow",
"Action": [
"logs:CreateLogGroup",
"logs:CreateLogStream",
"logs:PutLogEvents"
],
"Resource": "arn:aws:logs:us-east-1:123456789012:log-group:/aws/glue/*"
}
]
}Refer to the exhibit. A data engineer is troubleshooting an AWS Glue job that fails with an 'AccessDenied' error when trying to write to the S3 bucket 'my-data-lake'. The IAM policy attached to the Glue service role is shown. What is the missing permission?
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
✓
s3:ListBucket
The policy allows s3:GetObject and s3:PutObject on the bucket's objects, but it does not allow s3:ListBucket on the bucket itself. Many Glue operations require ListBucket to discover objects. Option A (s3:ListBucket) is the missing permission. Option B (s3:PutObjectAcl) is not needed. Option C (s3:GetBucketLocation) is not required. Option D (s3:DeleteObject) is not needed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
s3:ListBucket
Why this is correct
Correct: Glue needs ListBucket to list objects in the bucket.
- ✗
s3:PutObjectAcl
Why it's wrong here
Incorrect: Not needed unless setting ACLs.
- ✗
s3:GetBucketLocation
Why it's wrong here
Incorrect: Not required for write operations.
- ✗
s3:DeleteObject
Why it's wrong here
Incorrect: Delete is not needed for writing.
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.