The answer is a replication instance, a source endpoint, and a target endpoint. AWS DMS requires these three core resources to facilitate a database migration: the replication instance provides the compute and memory to perform the data transfer, the source endpoint points to the origin PostgreSQL database, and the target endpoint points to the destination Amazon Aurora PostgreSQL cluster. On the AWS Certified Database Specialty DBS-C01 exam, this question tests your understanding of DMS fundamentals versus unnecessary infrastructure; common traps include assuming a CloudFormation stack or a load balancer is required for the migration process. Remember that DMS is a managed service focused solely on data movement, so you only need the engine (replication instance) and the two connection points. A simple memory tip is “DMS needs three: the mover, the source, and the sink.”
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.
A company is migrating a PostgreSQL database to Amazon Aurora PostgreSQL. They want to use the AWS DMS for the migration. Which THREE resources need to be created in the AWS account?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DMS target endpoint pointing to Aurora PostgreSQL.
Options A, B, and D are correct. DMS requires a replication instance, source endpoint, and target endpoint. Option C is wrong because a CloudFormation stack is not required. Option E is wrong because a load balancer is not needed for DMS.
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.
✗
Application Load Balancer for the replication instance.
Why it's wrong here
DMS does not use load balancers.
✗
AWS CloudFormation stack to provision resources.
Why it's wrong here
CloudFormation is optional; resources can be created manually.
✓
DMS target endpoint pointing to Aurora PostgreSQL.
Why this is correct
The target endpoint defines the connection to the target database.
Related concept
Read the scenario before looking for a memorised answer.
✓
DMS replication instance.
Why this is correct
The replication instance is the core compute resource for DMS.
Related concept
Read the scenario before looking for a memorised answer.
✓
DMS source endpoint pointing to the PostgreSQL database.
Why this is correct
The source endpoint defines the connection to the source database.
Related concept
Read the scenario before looking for a memorised answer.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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: DMS target endpoint pointing to Aurora PostgreSQL. — Options A, B, and D are correct. DMS requires a replication instance, source endpoint, and target endpoint. Option C is wrong because a CloudFormation stack is not required. Option E is wrong because a load balancer is not needed for DMS.
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.
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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