PAS-C01 Migration Practice Question
Exhibit
Refer to the exhibit.
```json
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"ec2:DescribeInstances",
"ec2:StartInstances",
"ec2:StopInstances"
],
"Resource": "*"
},
{
"Effect": "Allow",
"Action": [
"s3:PutObject",
"s3:GetObject"
],
"Resource": "arn:aws:s3:::my-bucket/*"
}
]
}
```The above IAM policy is attached to an IAM role used by an AWS DMS replication instance. The DMS task is migrating data from an on-premises Oracle database to Amazon S3. The DMS task fails with an access error. What is missing from the policy?
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
✓
Permissions to pass the IAM role to the DMS replication instance are missing
The IAM policy attached to the role used by the DMS replication instance must include 'iam:PassRole' to allow DMS to pass the role to the replication instance. Without this permission, DMS cannot assume the role, leading to an access error. Option A is incorrect because EC2 describe permissions are not required for this migration. Option B is incorrect because the source is on-premises Oracle, not Amazon RDS. Option D is incorrect because the policy already includes S3 write permissions (implied by the context; the policy is not shown but the error is not about S3 access).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Permissions to describe EC2 instances are missing
Why it's wrong here
The policy includes ec2:DescribeInstances.
- ✗
Permissions to access Amazon RDS are missing
Why it's wrong here
The source is on-premises, not RDS.
- ✓
Permissions to pass the IAM role to the DMS replication instance are missing
Why this is correct
DMS needs iam:PassRole to allow the replication instance to assume the role.
- ✗
Permissions to write to the S3 bucket are missing
Why it's wrong here
The policy includes s3:PutObject for my-bucket.
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 PAS-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 PAS-C01 exam.