DBS-C01 Deployment and Migration Practice Question
A company is migrating a self-managed MongoDB database to Amazon DocumentDB (with MongoDB compatibility). Which TWO actions should the company take to ensure a successful migration? (Choose two.)
⚠ Common exam trap
Many exam-takers assume DMS can migrate from any MongoDB deployment (including Atlas) or that EBS snapshots are valid sources, but DMS strictly requires a live MongoDB endpoint with oplog access for CDC.
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 Schema Conversion Tool (SCT) to convert MongoDB schemas to DocumentDB compatible format.
AWS Schema Conversion Tool (SCT) can convert MongoDB schemas to a format compatible with Amazon DocumentDB, handling data type mappings and index definitions. This is essential because DocumentDB uses a different storage engine and schema structure than MongoDB, and SCT automates the conversion of collections, indexes, and validation rules to ensure compatibility before migration.
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 AWS Schema Conversion Tool (SCT) to convert MongoDB schemas to DocumentDB compatible format.
Why this is correct
SCT helps convert schemas for compatibility.
- ✗
Use AWS Database Migration Service (DMS) to migrate data from MongoDB Atlas to DocumentDB.
Why it's wrong here
MongoDB Atlas is not the source; the source is self-managed MongoDB.
- ✓
Use AWS DMS to perform a full load and ongoing replication from MongoDB to DocumentDB.
Why this is correct
DMS supports MongoDB as a source and DocumentDB as a target.
- ✗
Use AWS DMS with an Amazon EBS snapshot as the source for the migration.
Why it's wrong here
DMS does not use EBS snapshots as a source.
- ✗
Use AWS DMS to migrate data from MongoDB to Amazon DynamoDB, then import into DocumentDB.
Why it's wrong here
DynamoDB is a different database; this adds unnecessary complexity.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
Go deeper
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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.