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 2 TB and the network bandwidth is limited. The company needs to minimize downtime during migration. Which AWS service should be used?
⚠ Common exam trap
Watch out — candidates often choose AWS Snowball Edge for any large database with limited bandwidth, overlooking that DMS with CDC can achieve minimal downtime even for multi-terabyte databases, whereas Snowball introduces significant operational delay and is better suited for petabyte-scale or disconnected environments.
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 DMS is the correct choice because it supports ongoing replication from Oracle to Amazon RDS for Oracle, allowing you to perform a live migration with minimal downtime. With a 2 TB database and limited bandwidth, DMS can use Change Data Capture (CDC) to keep the target synchronized while the initial full load runs, then switch over with only a brief outage. This makes it ideal for minimizing downtime compared to offline methods.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Oracle Data Pump export and import
Why it's wrong here
This requires downtime for the export.
- ✗
AWS Schema Conversion Tool (SCT)
Why it's wrong here
SCT is for schema conversion, not continuous data migration.
- ✓
AWS Database Migration Service (DMS)
Why this is correct
DMS can migrate live data with minimal downtime.
- ✗
AWS Snowball Edge
Why it's wrong here
Snowball is for offline transfer, which introduces downtime.
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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.