DBS-C01 Deployment and Migration Practice Question
A media company is migrating a 5 TB MongoDB database to Amazon DocumentDB. The migration must have minimal downtime. The source MongoDB uses sharding across 10 shards. Which migration strategy is MOST appropriate?
⚠ Common exam trap
Candidates often assume native MongoDB replication (Option A) works because DocumentDB claims MongoDB compatibility, but DocumentDB does not implement the MongoDB replication protocol, making DMS with CDC the only viable near-zero downtime option.
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 DMS with MongoDB as source and DocumentDB as target, enabling CDC
AWS DMS with CDC (Change Data Capture) is the most appropriate strategy because it supports ongoing replication from a sharded MongoDB source to Amazon DocumentDB, enabling near-zero downtime migration. DMS can handle the 5 TB dataset and 10 shards by using the MongoDB oplog to capture changes after the initial full load, ensuring minimal interruption to the media company's operations.
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 native MongoDB replication to sync to DocumentDB
Why it's wrong here
DocumentDB does not support native MongoDB replication protocol.
- ✓
Use AWS DMS with MongoDB as source and DocumentDB as target, enabling CDC
Why this is correct
DMS supports MongoDB to DocumentDB migration with CDC for minimal downtime.
- ✗
Export data to S3 and use AWS Glue to load into DocumentDB
Why it's wrong here
Glue does not support CDC from MongoDB.
- ✗
Use mongoexport to export data and mongoimport to import into DocumentDB
Why it's wrong here
Requires downtime and does not support CDC.
Go deeper
Related to this question
About these practice questions
One of 1,663 original DBS-C01 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
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.