DBS-C01 Workload-Specific Database Design Practice Question
A company is running a critical application on Amazon RDS for Oracle. They need to ensure high availability with automatic failover in case of a database failure. The database size is 500 GB. Which solution should they implement?
⚠ Common exam trap
It's easy for candidates to confuse cross-Region read replicas or snapshot-based recovery with automatic failover, but only Multi-AZ provides synchronous replication and automatic failover without manual intervention for RDS databases.
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
✓
Enable Multi-AZ deployment
Multi-AZ deployment for Amazon RDS for Oracle provides synchronous replication to a standby instance in a different Availability Zone, with automatic failover in the event of a database failure. This ensures high availability without manual intervention, meeting the requirement for automatic failover for a 500 GB Oracle database.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Create a cross-Region read replica
Why it's wrong here
Read replicas do not provide automatic failover.
- ✗
Migrate to Amazon DynamoDB Global Tables
Why it's wrong here
This is a different database service and would require application changes.
- ✗
Take regular snapshots and restore in a different Availability Zone
Why it's wrong here
Snapshot restore is manual and not automatic.
- ✓
Enable Multi-AZ deployment
Why this is correct
Multi-AZ automatically fails over to a standby instance.
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Written by Johnson Ajibi, MSc IT Security
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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.