Question 67 of 1,663
DBS-C01 Management and Operations Practice Question
A company is running a production Amazon RDS for MySQL Multi-AZ DB instance. The database administrator needs to perform a minor version upgrade with minimal downtime. Which TWO actions should be taken? (Choose TWO.)
⚠ Common exam trap
Many candidates assume 'immediate' means faster and less downtime, but in a Multi-AZ setup, applying the upgrade immediately actually causes more downtime than using the maintenance window with automatic upgrades, because the rolling failover approach is designed to minimize disruption.
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
✓
Modify the DB instance to enable automatic minor version upgrade.
Enabling automatic minor version upgrades on an RDS for MySQL Multi-AZ instance allows Amazon RDS to apply the upgrade during the next maintenance window with minimal downtime. During the upgrade, RDS patches the standby first, then performs a failover to make the standby the new primary, resulting in a brief (typically under 60 seconds) interruption rather than a full outage. This approach leverages the Multi-AZ architecture to reduce downtime compared to manual upgrades.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Modify the DB instance to enable automatic minor version upgrade.
Why this is correct
Automatic upgrades apply during maintenance window with minimal downtime.
- ✓
Apply the upgrade immediately during the next maintenance window.
Why this is correct
Applying during maintenance window minimizes manual intervention and downtime.
- ✗
Create a read replica, upgrade the replica, and promote it.
Why it's wrong here
This is a valid approach but not minimal downtime compared to applying directly; also it requires application changes.
- ✗
Modify the DB instance to be a Single-AZ deployment to simplify the upgrade.
Why it's wrong here
Single-AZ reduces availability and does not minimize downtime.
- ✗
Stop the DB instance before applying the upgrade.
Why it's wrong here
Stopping the instance causes downtime.
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Last reviewed: Jul 4, 2026
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