- A
Set up an AWS Direct Connect or VPN connection between on-premises and AWS.
Network connectivity is required for DMS to access the source.
- B
Deploy an Amazon EC2 instance to act as a proxy for the DMS replication.
Why wrong: DMS can connect directly to the source; a proxy is unnecessary.
- C
Create the target Amazon RDS for MySQL instance.
The target database must be provisioned before migration.
- D
Use AWS DMS with ongoing replication from the on-premises MySQL database.
Ongoing replication minimizes downtime by capturing changes.
- E
Install the AWS Schema Conversion Tool on the source server to convert the schema.
Why wrong: Schema conversion is not needed since the target is also MySQL.
Question 361 of 1,730
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 planning to migrate a 1 TB MySQL database from on-premises to Amazon RDS for MySQL. The migration must have minimal downtime and support ongoing replication. Which THREE steps should the company include in the migration plan? (Choose THREE.)
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
✓
Set up an AWS Direct Connect or VPN connection between on-premises and AWS.
Option A is correct because a stable, low-latency network connection (Direct Connect or VPN) is essential for AWS DMS to perform ongoing replication with minimal downtime. Without this, the replication can be interrupted by network issues, causing data loss or extended cutover windows.
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.
- ✓
Set up an AWS Direct Connect or VPN connection between on-premises and AWS.
Why this is correct
Network connectivity is required for DMS to access the source.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Deploy an Amazon EC2 instance to act as a proxy for the DMS replication.
Why it's wrong here
DMS can connect directly to the source; a proxy is unnecessary.
- ✓
Create the target Amazon RDS for MySQL instance.
Why this is correct
The target database must be provisioned before migration.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Use AWS DMS with ongoing replication from the on-premises MySQL database.
Why this is correct
Ongoing replication minimizes downtime by capturing changes.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Install the AWS Schema Conversion Tool on the source server to convert the schema.
Why it's wrong here
Schema conversion is not needed since the target is also MySQL.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume an EC2 proxy is needed for DMS replication, but DMS replication instances handle connectivity directly, and the proxy is only used in specific scenarios like VPC peering across regions or complex network topologies.
Detailed technical explanation
How to think about this question
AWS DMS ongoing replication uses Change Data Capture (CDC) by reading the MySQL binary logs (binlog) in row-based format. The source database must have binlog retention enabled, and the DMS replication instance must have network connectivity to both the on-premises source and the RDS target, which is why a Direct Connect or VPN is critical for consistent throughput and low latency.
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.
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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: Set up an AWS Direct Connect or VPN connection between on-premises and AWS. — Option A is correct because a stable, low-latency network connection (Direct Connect or VPN) is essential for AWS DMS to perform ongoing replication with minimal downtime. Without this, the replication can be interrupted by network issues, causing data loss or extended cutover windows.
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: Jun 11, 2026
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