DBS-C01 Deployment and Migration Practice Question
A company is migrating a 10 TB Oracle database to Amazon RDS for Oracle. The migration window is limited to 24 hours. The source database is running on-premises with a 500 Mbps network connection. Which migration approach should be used?
⚠ Common exam trap
Many exam-takers assume Oracle Data Pump or physical backups are faster for large databases, but they overlook the network bandwidth constraint and the need for ongoing replication to meet the 24-hour window, while DMS's ability to compress and replicate changes makes it the only viable 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 full load and ongoing replication
AWS DMS with full load and ongoing replication is the correct approach because it can handle the 10 TB migration within the 24-hour window by using the 500 Mbps connection for the initial full load (which takes approximately 48 hours at full bandwidth, but DMS can compress data and use parallel tasks to reduce time), and then switch to ongoing replication to minimize downtime. The ongoing replication captures changes via Oracle LogMiner or binary logs, allowing the source to remain operational during the 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 DMS with full load and ongoing replication
Why this is correct
DMS supports large data volumes and ongoing replication to minimize downtime.
- ✗
Create an RDS read replica from the on-premises database
Why it's wrong here
RDS read replicas cannot be created from on-premises databases.
- ✗
Take a physical backup of the source database and restore to RDS
Why it's wrong here
Physical backup transfer to S3 and restore can be time-consuming and may exceed the 24-hour window.
- ✗
Use Oracle Data Pump to export and import the database
Why it's wrong here
Data Pump requires downtime and may not meet the 24-hour window due to network speed.
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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.