DBS-C01 Management and Operations Practice Question
A company is migrating an on-premises Oracle database to Amazon RDS for Oracle. The database size is 500 GB. The migration must have minimal downtime. Which AWS service should be used to perform the migration?
⚠ Common exam trap
It's easy for candidates to confuse AWS DataSync or Snowball Edge as viable options for live database migrations, but DataSync is for file/object transfers and Snowball Edge is for offline bulk data movement, neither of which support ongoing change replication or minimal-downtime database migration.
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 (DMS)
AWS Database Migration Service (DMS) is the correct choice because it supports heterogeneous migrations from Oracle to Amazon RDS for Oracle with minimal downtime. DMS can perform continuous replication using Oracle's change data capture (CDC) via LogMiner or binary reader, allowing the source database to remain operational during the migration. This makes it ideal for a 500 GB database where downtime must be minimized.
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 Snowball Edge
Why it's wrong here
Snowball is for bulk data transfer, not for ongoing replication.
- ✓
AWS Database Migration Service (DMS)
Why this is correct
DMS supports Oracle to RDS Oracle migrations with minimal downtime using change data capture.
- ✗
AWS DataSync
Why it's wrong here
DataSync is for file and object storage, not database migration.
- ✗
Amazon RDS for Oracle snapshot copy
Why it's wrong here
Snapshot copy is only for existing RDS instances, not for importing from on-premises.
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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.