DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Refer to the exhibit. An IAM policy is attached to a user who will manage AWS DMS tasks. When the user tries to start a replication task, they receive an access denied error. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The policy is missing permissions to describe endpoints and connections
Option A is correct because the policy does not include dms:StartReplicationTask, only dms:StartReplicationTask is not present (the action is StartReplicationTask, not StartReplicationTask? Actually the policy has StartReplicationTask, so that should be fine. Wait, the policy does include dms:StartReplicationTask. So the error might be due to missing DescribeEndpoints. Option D is plausible. Let's re-evaluate. The policy includes StartReplicationTask, so A is not correct. The user might need dms:DescribeEndpoints to start a task. So D is correct.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 rds:DescribeDBInstances
Why it's wrong here
The policy includes rds:DescribeDBInstances.
✗
The policy does not allow the dms:StartReplicationTask action
Why it's wrong here
The policy includes dms:StartReplicationTask, so this is not the issue.
✓
The policy is missing permissions to describe endpoints and connections
Why this is correct
To start a replication task, DMS needs to describe endpoints and connections; these actions are missing from the policy.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The policy does not allow dms:CreateReplicationTask
Why it's wrong here
The policy includes dms:CreateReplicationTask.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Deployment and Migration — This question tests Deployment and Migration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The policy is missing permissions to describe endpoints and connections — Option A is correct because the policy does not include dms:StartReplicationTask, only dms:StartReplicationTask is not present (the action is StartReplicationTask, not StartReplicationTask? Actually the policy has StartReplicationTask, so that should be fine. Wait, the policy does include dms:StartReplicationTask. So the error might be due to missing DescribeEndpoints. Option D is plausible. Let's re-evaluate. The policy includes StartReplicationTask, so A is not correct. The user might need dms:DescribeEndpoints to start a task. So D is correct.
What should I do if I get this DBS-C01 question wrong?
Identify which DBS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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