DBS-C01 Deployment and Migration Practice Question
Which THREE actions should be taken to prepare for a migration of an on-premises MySQL database to Amazon RDS for MySQL with minimal downtime using AWS DMS?
⚠ Common exam trap
Watch out — candidates often think a full backup is necessary for migration, but DMS handles the full load itself, and the key to minimal downtime is enabling binary logging and proper privileges for continuous replication.
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
✓
Enable binary logging on the source MySQL database
AWS DMS requires binary logging (binlog) to be enabled on the source MySQL database for ongoing replication (change data capture). DMS reads the binary log to capture inserts, updates, and deletes in near real-time, which is essential for minimizing downtime during 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.
- ✓
Enable binary logging on the source MySQL database
Why this is correct
Binary logging is required for DMS to capture changes.
- ✓
Set up an SSH tunnel or VPN for secure connectivity between DMS and the source
Why this is correct
Secure connection is recommended for data in transit.
- ✓
Create a database user with REPLICATION CLIENT and REPLICATION SLAVE privileges
Why this is correct
DMS needs these privileges to read the binary logs.
- ✗
Disable foreign key checks on the source database
Why it's wrong here
Foreign keys are handled during migration; disabling is not required.
- ✗
Take a full backup of the source database
Why it's wrong here
DMS performs a full load automatically; a separate backup is not needed.
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Senior Network & Security Engineer · founder of Courseiva
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