Question 1,229 of 1,663
DBS-C01 Workload-Specific Database Design Practice Question
A company is migrating an on-premises MySQL database to Amazon RDS. The database is used for a critical e-commerce application that requires high availability with automatic failover. Which RDS deployment option should the company choose to meet these requirements?
⚠ Common exam trap
Test-takers frequently confuse Multi-AZ with Read Replicas, assuming that a Read Replica can provide automatic failover, but in RDS MySQL, Read Replicas require manual promotion and do not offer synchronous replication or automatic failover.
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
✓
Multi-AZ deployment with a standby in a different AZ
A Multi-AZ deployment for Amazon RDS MySQL automatically provisions and maintains a synchronous standby replica in a different Availability Zone (AZ). In the event of an AZ failure or primary instance failure, Amazon RDS automatically fails over to the standby, providing high availability with minimal downtime. This meets the requirement for automatic failover without manual intervention.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Multi-Region deployment with Read Replicas
Why it's wrong here
Read Replicas are for read scaling, not automatic failover.
- ✗
Single-AZ instance with a standby in the same AZ
Why it's wrong here
Single-AZ does not provide automatic failover.
- ✓
Multi-AZ deployment with a standby in a different AZ
Why this is correct
Multi-AZ provides automatic failover to a standby in a different AZ.
- ✗
Single-AZ instance with a Read Replica
Why it's wrong here
Read Replicas do not provide automatic failover.
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Last reviewed: Jun 24, 2026
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.
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