DBS-C01 Deployment and Migration Practice Question
A company is migrating a 500 GB MongoDB database to Amazon DocumentDB. The migration must have minimal impact on the source database. Which approach should the company take?
⚠ Common exam trap
Candidates often assume native MongoDB tools (mongodump/mongoexport) are always the best for migration, but they fail to consider the requirement for minimal impact and the need for ongoing replication, which only AWS DMS provides for DocumentDB.
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
✓
Use AWS Database Migration Service (DMS) with MongoDB as source and DocumentDB as target.
AWS DMS supports ongoing replication from MongoDB to Amazon DocumentDB, enabling a live migration with minimal impact on the source database. DMS uses the MongoDB oplog to capture changes continuously, so the source is only read during the initial load and then tailed for CDC, avoiding heavy locks or performance degradation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use mongodump to export the data, then use mongorestore to import into DocumentDB.
Why it's wrong here
Causes significant impact on source.
- ✗
Use mongoexport to export CSV, then use the DocumentDB import tool.
Why it's wrong here
Export causes impact.
- ✓
Use AWS Database Migration Service (DMS) with MongoDB as source and DocumentDB as target.
Why this is correct
DMS allows online migration with minimal impact.
- ✗
Use AWS Schema Conversion Tool (SCT) to convert schema, then copy data.
Why it's wrong here
SCT is for schema conversion, not data migration.
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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.