- A
Take daily snapshots of the RDS instance and copy them to another Region.
Why wrong: Incorrect: Daily snapshots mean up to 24 hours of data loss, exceeding the 15-minute RPO.
- B
Use an RDS DB instance with a Multi-AZ standby and a cross-Region Read Replica.
Why wrong: Incorrect: Multi-AZ failover is fast, but cross-Region replication is asynchronous; RPO may exceed 15 minutes.
- C
Use an RDS Multi-AZ DB Cluster deployment.
Correct: Multi-AZ DB Cluster provides synchronous replication with automatic failover, meeting RPO <15min and RTO <1 hour.
- D
Use a single-AZ RDS instance with automated backups and point-in-time recovery.
Why wrong: Incorrect: RPO can be up to 5 minutes but RTO is typically hours, not under 1 hour.
Question 1,384 of 1,546
RDS Multi-AZ DB Cluster for Low RPO and RTO
This SOA-C02 practice question tests your understanding of reliability and business continuity. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A SysOps administrator is designing a disaster recovery plan for a critical application hosted on AWS. The application runs on EC2 instances with data stored in an RDS MySQL database. The RPO must be less than 15 minutes, and the RTO must be less than 1 hour. Which solution meets these requirements?
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
✓
Use an RDS Multi-AZ DB Cluster deployment.
Option C is correct because an RDS Multi-AZ DB Cluster deployment provides synchronous replication across three Availability Zones and automatic failover, enabling an RTO of typically under 1 minute and an RPO of effectively zero (no data loss). This meets the strict RPO (<15 minutes) and RTO (<1 hour) requirements without relying on cross-Region replication or manual recovery steps.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 daily snapshots of the RDS instance and copy them to another Region.
Why it's wrong here
Incorrect: Daily snapshots mean up to 24 hours of data loss, exceeding the 15-minute RPO.
- ✗
Use an RDS DB instance with a Multi-AZ standby and a cross-Region Read Replica.
Why it's wrong here
Incorrect: Multi-AZ failover is fast, but cross-Region replication is asynchronous; RPO may exceed 15 minutes.
- ✓
Use an RDS Multi-AZ DB Cluster deployment.
Why this is correct
Correct: Multi-AZ DB Cluster provides synchronous replication with automatic failover, meeting RPO <15min and RTO <1 hour.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use a single-AZ RDS instance with automated backups and point-in-time recovery.
Why it's wrong here
Incorrect: RPO can be up to 5 minutes but RTO is typically hours, not under 1 hour.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Multi-AZ standby (which provides high availability but not cross-Region DR) with Multi-AZ DB Cluster (which offers synchronous replication and automatic failover), or they mistakenly believe that a cross-Region Read Replica can meet strict RPO/RTO requirements due to its asynchronous nature and lack of automatic failover.
Detailed technical explanation
How to think about this question
RDS Multi-AZ DB Cluster uses synchronous replication across three AZs with a primary writer and two readable standby replicas, leveraging the MySQL Group Replication plugin for automatic failover and crash recovery. Under the hood, failover is handled by the RDS service health detection and DNS record update, typically completing within 60 seconds, which ensures the RTO target is easily met. In a real-world scenario, if the primary fails, the cluster promotes one of the standbys to writer automatically, and the application reconnects via the same endpoint, achieving near-zero downtime.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this SOA-C02 question test?
Reliability and Business Continuity — This question tests Reliability and Business Continuity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use an RDS Multi-AZ DB Cluster deployment. — Option C is correct because an RDS Multi-AZ DB Cluster deployment provides synchronous replication across three Availability Zones and automatic failover, enabling an RTO of typically under 1 minute and an RPO of effectively zero (no data loss). This meets the strict RPO (<15 minutes) and RTO (<1 hour) requirements without relying on cross-Region replication or manual recovery steps.
What should I do if I get this SOA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This SOA-C02 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 SOA-C02 exam.
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