DBS-C01 Deployment and Migration Practice Question
A company is migrating a 10 TB MongoDB database to Amazon DocumentDB. The migration must have minimal downtime. Which strategy should be used?
⚠ Common exam trap
Many candidates assume a simple dump-and-restore or file-copy approach is sufficient for large databases, overlooking the need for change data capture to achieve minimal downtime, or they may confuse CloudEndure's server replication capabilities with database-specific migration tools.
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, with change data capture.
AWS DMS with MongoDB as source and DocumentDB as target, using change data capture (CDC), is the correct strategy because it enables a live migration with minimal downtime. DMS performs an initial full load of the 10 TB database and then continuously replicates ongoing changes from the MongoDB oplog, allowing you to cut over to DocumentDB with only a brief pause.
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 database and mongorestore to import into DocumentDB.
Why it's wrong here
This is an offline method and would cause significant downtime for 10 TB.
- ✗
Use AWS CloudEndure to replicate the MongoDB server to DocumentDB.
Why it's wrong here
CloudEndure is for server-level replication, not database-level.
- ✗
Copy the database files to Amazon S3 and restore to DocumentDB.
Why it's wrong here
DocumentDB does not support restore from S3.
- ✓
Use AWS DMS with MongoDB as source and DocumentDB as target, with change data capture.
Why this is correct
AWS DMS supports MongoDB as a source and can perform continuous replication.
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Written by Johnson Ajibi, MSc IT Security
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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.