DBS-C01 Deployment and Migration Practice Question
A company is deploying a new web application that uses Amazon RDS for MySQL. To meet high availability requirements, the database must automatically failover to a standby in a different Availability Zone with minimal downtime. Which deployment configuration should be used?
⚠ Common exam trap
Watch out — candidates often confuse Multi-AZ deployments (synchronous, automatic failover) with read replicas (asynchronous, manual promotion) or assume that a Multi-AZ cluster deployment applies to standard RDS MySQL, when it is actually an Aurora-specific feature.
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 automatic failover
A Multi-AZ deployment for Amazon RDS automatically provisions and maintains a synchronous standby replica in a different Availability Zone. If the primary DB instance fails, Amazon RDS automatically fails over to the standby, typically within 60–120 seconds, without requiring manual intervention. This meets the high availability requirement with minimal downtime.
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-AZ deployment with automatic failover
Why this is correct
Multi-AZ provides a standby in a different AZ and automatic failover.
- ✗
Single-AZ deployment with enhanced monitoring
Why it's wrong here
Enhanced monitoring provides metrics but no failover.
- ✗
Multi-AZ cluster deployment
Why it's wrong here
RDS for MySQL does not support cluster deployment; Aurora does.
- ✗
Single-AZ deployment with a read replica
Why it's wrong here
Read replicas do not provide automatic failover; they are for read scaling.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.