- A
AWS Database Migration Service (AWS DMS)
DMS supports MongoDB to DocumentDB migration with ongoing replication.
- B
Amazon CloudWatch
Why wrong: CloudWatch is for monitoring, not migration.
- C
AWS Schema Conversion Tool (AWS SCT)
Why wrong: SCT converts schema but does not migrate data.
- D
AWS Glue
Why wrong: Glue is an ETL service, not designed for database migration with ongoing replication.
Question 1,476 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 migrating an on-premises MongoDB database to Amazon DocumentDB (with MongoDB compatibility). Which AWS service can perform the migration with minimal downtime using 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 (AWS DMS)
AWS DMS supports MongoDB as a source and Amazon DocumentDB as a target, enabling live migration with ongoing replication via change data capture (CDC). This allows the company to migrate with minimal downtime by continuously applying changes from the source MongoDB to the target DocumentDB until cutover.
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 Database Migration Service (AWS DMS)
Why this is correct
DMS supports MongoDB to DocumentDB migration with ongoing replication.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon CloudWatch
Why it's wrong here
CloudWatch is for monitoring, not migration.
- ✗
AWS Schema Conversion Tool (AWS SCT)
Why it's wrong here
SCT converts schema but does not migrate data.
- ✗
AWS Glue
Why it's wrong here
Glue is an ETL service, not designed for database migration with ongoing replication.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS SCT's schema conversion capability with full migration including data replication, but SCT does not perform ongoing data sync or CDC, which is essential for minimal-downtime migrations.
Detailed technical explanation
How to think about this question
AWS DMS uses a replication instance to connect to the source MongoDB via the MongoDB wire protocol and captures ongoing changes by reading the MongoDB oplog (operations log). The target DocumentDB endpoint is configured with the appropriate authentication and TLS settings; DMS automatically handles data type mapping (e.g., BSON to DocumentDB's JSON-like format) and can resume replication from a specific oplog position if interrupted. In real-world scenarios, you must ensure the source MongoDB has oplog retention long enough to cover the initial load and any replication lag.
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 (AWS DMS) — AWS DMS supports MongoDB as a source and Amazon DocumentDB as a target, enabling live migration with ongoing replication via change data capture (CDC). This allows the company to migrate with minimal downtime by continuously applying changes from the source MongoDB to the target DocumentDB until cutover.
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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