- A
AWS Glue.
Why wrong: Glue is for ETL, not database replication.
- B
AWS Backup.
Why wrong: Backup is for snapshots, not replication.
- C
AWS Database Migration Service (DMS).
DMS provides CDC for ongoing replication.
- D
AWS Schema Conversion Tool (SCT).
Why wrong: Only converts schema.
Question 695 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 needs to migrate an on-premises PostgreSQL database to Amazon Aurora PostgreSQL with minimal downtime. Which AWS service should be used for the ongoing replication?
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
✓
AWS Database Migration Service (DMS).
AWS Database Migration Service (DMS) supports ongoing replication (change data capture, CDC) from an on-premises PostgreSQL source to an Amazon Aurora PostgreSQL target using logical replication slots. This allows you to keep the target database synchronized with minimal downtime after the initial full load, making it the correct choice for a migration with minimal downtime.
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.
- ✗
AWS Glue.
Why it's wrong here
Glue is for ETL, not database replication.
- ✗
AWS Backup.
Why it's wrong here
Backup is for snapshots, not replication.
- ✓
AWS Database Migration Service (DMS).
Why this is correct
DMS provides CDC for ongoing replication.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Schema Conversion Tool (SCT).
Why it's wrong here
Only converts schema.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS DMS with AWS SCT, thinking SCT handles both schema conversion and data migration, but SCT only converts schemas and generates migration scripts, while DMS handles the actual data movement and ongoing replication.
Detailed technical explanation
How to think about this question
AWS DMS uses logical replication slots on the source PostgreSQL database to capture changes via the pgoutput plugin, which streams WAL (Write-Ahead Log) changes to the target. During ongoing replication, DMS applies these changes in near real-time, allowing the target to stay consistent with the source. A real-world scenario where this matters is when the source database has high transaction volume; DMS can handle throttling and resume from the last checkpoint if interrupted, ensuring minimal data loss.
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 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 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: AWS Database Migration Service (DMS). — AWS Database Migration Service (DMS) supports ongoing replication (change data capture, CDC) from an on-premises PostgreSQL source to an Amazon Aurora PostgreSQL target using logical replication slots. This allows you to keep the target database synchronized with minimal downtime after the initial full load, making it the correct choice for a migration with minimal downtime.
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
This DBS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DBS-C01 exam.
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