DBS-C01 Deployment and Migration Practice Question
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?
⚠ Common exam trap
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.
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.
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.
- ✗
Amazon CloudWatch
Why it's wrong here
CloudWatch is for monitoring, not migration.
- ✗
AWS Schema Conversion Tool (AWS SCT)
Why it's wrong here
AWS Schema Conversion Tool (AWS SCT) is incorrect because it focuses on converting database schemas and code objects between different database engines, and performing initial data loads. It does not provide the ongoing replication capabilities necessary for a minimal downtime migration from MongoDB to DocumentDB. SCT is tempting as it is part of the AWS migration toolkit, and would be the correct choice if the primary challenge involved complex schema and code object translation, such as migrating from Oracle to PostgreSQL, where its conversion features are crucial.
- ✗
AWS Glue
Why it's wrong here
Glue is an ETL service, not designed for database migration with ongoing replication.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.