DBS-C01 Deployment and Migration Practice Question
A company wants to deploy a highly available Amazon RDS for MySQL database across two Availability Zones. Which feature should be enabled?
⚠ Common exam trap
Candidates often confuse read replicas with Multi-AZ deployments, thinking that placing a read replica in a different AZ provides high availability, but read replicas are asynchronous and do not support 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
Multi-AZ deployment synchronously replicates data to a standby instance in a different Availability Zone, providing automatic failover in case of an AZ outage. This is the correct feature for achieving high availability across two Availability Zones, as it ensures minimal downtime 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.
- ✗
Read replicas in a different AZ
Why it's wrong here
Read replicas are asynchronous and do not provide automatic failover.
- ✗
Automated backups with retention
Why it's wrong here
Backups are for recovery, not high availability.
- ✗
Enhanced Monitoring
Why it's wrong here
Enhanced Monitoring provides metrics, not failover.
- ✓
Multi-AZ deployment
Why this is correct
Multi-AZ provides synchronous standby for automatic failover.
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Same concept, more angles
2 more ways this is tested on DBS-C01
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company is deploying Amazon RDS for MySQL in a Multi-AZ configuration for high availability. The database must be able to automatically failover to a standby in another Availability Zone. Which RDS feature enables this?
easy- ✓ A.Multi-AZ deployment
- B.Automated backups
- C.Enhanced Monitoring
- D.Read Replicas
Why A: Multi-AZ deployment for Amazon RDS automatically provisions and maintains a synchronous standby replica in a different Availability Zone. When a failure is detected, Amazon RDS automatically fails over to the standby, ensuring high availability without manual intervention. This is the native RDS feature designed specifically for automatic failover across AZs.
Variation 2. A company is planning to deploy a new Amazon RDS for Oracle database in a Multi-AZ configuration. The database must be highly available and fault-tolerant. Which THREE actions should the company take to meet these requirements? (Choose three.)
medium- A.Take manual snapshots daily
- B.Create a read replica in a different Availability Zone
- ✓ C.Enable Multi-AZ deployment
- ✓ D.Enable automated backups with a retention period of 35 days
- ✓ E.Enable deletion protection
Why C: Enabling Multi-AZ deployment for Amazon RDS for Oracle automatically provisions and maintains a synchronous standby replica in a different Availability Zone. This provides automatic failover in the event of an AZ outage or primary instance failure, ensuring high availability and fault tolerance without manual intervention.
JA
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.