- A
Application Load Balancer for the replication instance.
Why wrong: DMS does not use load balancers.
- B
AWS CloudFormation stack to provision resources.
Why wrong: CloudFormation is optional; resources can be created manually.
- C
DMS target endpoint pointing to Aurora PostgreSQL.
The target endpoint defines the connection to the target database.
- D
DMS replication instance.
The replication instance is the core compute resource for DMS.
- E
DMS source endpoint pointing to the PostgreSQL database.
The source endpoint defines the connection to the source database.
Question 647 of 1,730
DBS-C01 Deployment and Migration Practice Question
This DBS-C01 practice question tests your understanding of deployment and migration. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 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
✓
DMS target endpoint pointing to Aurora PostgreSQL.
Option C is correct because AWS DMS requires a target endpoint that specifies the connection details for the Amazon Aurora PostgreSQL database. This endpoint tells DMS where to load the migrated data, and it must be configured with the correct database name, credentials, and VPC settings to ensure successful connectivity during the migration task.
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
The trap here is that candidates might think CloudFormation is mandatory for provisioning DMS resources, but the exam tests that only the replication instance and both endpoints are the core required components for a DMS migration task.
Detailed technical explanation
How to think about this question
AWS DMS uses a replication instance to perform the actual data transfer, which reads from the source endpoint (e.g., on-premises PostgreSQL) and writes to the target endpoint (e.g., Aurora PostgreSQL). The replication instance must be in a VPC with network access to both endpoints, and endpoints store connection strings, SSL settings, and secrets from AWS Secrets Manager. In real-world scenarios, you might also need to enable logical replication on the source PostgreSQL database by setting `rds.logical_replication` to 1 and creating a publication for continuous replication.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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.
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Deployment and Migration — study guide chapter
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FAQ
Questions learners often ask
What does this DBS-C01 question test?
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. — Option C is correct because AWS DMS requires a target endpoint that specifies the connection details for the Amazon Aurora PostgreSQL database. This endpoint tells DMS where to load the migrated data, and it must be configured with the correct database name, credentials, and VPC settings to ensure successful connectivity during the migration task.
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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Last reviewed: Jul 4, 2026
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