DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 allows creation of a DMS replication task only if the source database engine is Oracle. A user attempts to create a replication task with a MySQL source. What will happen?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The action will be denied because the condition does not match.
Option D is correct because the IAM policy includes a condition that requires the source engine to be Oracle. When the user attempts to create a DMS replication task with a MySQL source, the condition fails, and IAM denies the action by default. The explicit deny is not needed; IAM uses an implicit deny when no policy statement allows the action under the given conditions.
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 action will fail with an error because the policy is malformed.
Why it's wrong here
Policy is valid.
✗
The action will succeed but the task will fail later.
Why it's wrong here
The policy denies the API call.
✗
The action will be allowed because the resource is '*'.
Why it's wrong here
Condition restricts to Oracle.
✓
The action will be denied because the condition does not match.
Why this is correct
Condition fails for MySQL.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume a wildcard resource ('*') grants blanket permission, overlooking that conditions in the Allow statement must be satisfied for the Allow to take effect, and that IAM's default behavior is to deny any request that does not match an applicable Allow.
Detailed technical explanation
How to think about this question
IAM policy evaluation uses a default deny, and an Allow statement with conditions only grants access when all conditions are met. The dms:SourceEngine condition key is evaluated at request time based on the parameters passed to the CreateReplicationTask API. If the condition fails, IAM returns an AccessDenied exception before DMS processes the request, ensuring that no task is created.
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.
TExam Day Tips
→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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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 action will be denied because the condition does not match. — Option D is correct because the IAM policy includes a condition that requires the source engine to be Oracle. When the user attempts to create a DMS replication task with a MySQL source, the condition fails, and IAM denies the action by default. The explicit deny is not needed; IAM uses an implicit deny when no policy statement allows the action under the given conditions.
What should I do if I get this DBS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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