Question 1,202 of 1,663
DBS-C01 Management and Operations Practice Question
A company uses Amazon RDS for PostgreSQL with a single-AZ deployment. The operations team needs to ensure that the database is available during a planned maintenance event that requires a reboot. The maintenance window is set for 30 minutes. The database size is 200 GB and the application can tolerate a few minutes of downtime. Which action should the team take to minimize downtime during the reboot?
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 be Multi-AZ
Enabling Multi-AZ on the RDS instance creates a standby in a different Availability Zone. During planned maintenance, Amazon RDS automatically performs a failover to the standby, resulting in minimal downtime (typically under a minute), which meets the requirement of a few minutes of downtime. Option A is incorrect because restoring from a manual snapshot takes much longer than a few minutes and is not an automated failover. Option B is incorrect because promoting a read replica requires manual intervention and the replica may not be fully synchronized, leading to potential data loss and longer downtime. Option C merely schedules the reboot during low traffic but does not reduce the downtime of the reboot itself; the instance still becomes unavailable during the reboot.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Take a manual snapshot before the maintenance window and restore it if needed
Why it's wrong here
Restoring a snapshot takes longer than the maintenance window.
- ✗
Create a read replica and promote it to primary after the reboot
Why it's wrong here
Promoting a read replica takes time and does not automate failover.
- ✗
Schedule the reboot during a low-traffic period
Why it's wrong here
This does not minimize downtime; the instance still becomes unavailable.
- ✓
Modify the DB instance to be Multi-AZ
Why this is correct
Multi-AZ provides automatic failover with minimal downtime during maintenance.
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Last reviewed: Jun 20, 2026
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