- A
Create a cross-Region Read Replica and promote it during a disaster.
Why wrong: Promoting a Read Replica is a manual process, not automatic failover.
- B
Take daily automated snapshots and restore them in another Region.
Why wrong: Snapshot restore is not automated and takes time, leading to significant downtime.
- C
Deploy the RDS instance in a Multi-AZ configuration.
Why wrong: Multi-AZ provides high availability within a single Region, not across Regions.
- D
Use Amazon Aurora Global Database with a primary cluster in one Region and a secondary in another.
Aurora Global Database supports automatic failover across Regions with RPO of 1 second.
Question 1,267 of 1,786
DEA-C01 Data Store Management Practice Question
This DEA-C01 practice question tests your understanding of data store management. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 company runs a critical transactional database on Amazon RDS for PostgreSQL. They need to achieve high availability with automatic failover to a different AWS Region in case of a regional outage. 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 Amazon Aurora Global Database with a primary cluster in one Region and a secondary in another.
Amazon Aurora Global Database is designed for cross-Region disaster recovery, replicating data with a typical latency of under one second and providing automatic failover from the primary Region to a secondary Region. This meets the requirement of high availability with automatic failover during a regional outage, unlike standard RDS options which lack built-in cross-Region automatic failover.
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.
- ✗
Create a cross-Region Read Replica and promote it during a disaster.
Why it's wrong here
Promoting a Read Replica is a manual process, not automatic failover.
- ✗
Take daily automated snapshots and restore them in another Region.
Why it's wrong here
Snapshot restore is not automated and takes time, leading to significant downtime.
- ✗
Deploy the RDS instance in a Multi-AZ configuration.
Why it's wrong here
Multi-AZ provides high availability within a single Region, not across Regions.
- ✓
Use Amazon Aurora Global Database with a primary cluster in one Region and a secondary in another.
Why this is correct
Aurora Global Database supports automatic failover across Regions with RPO of 1 second.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Multi-AZ (which is intra-Region) with cross-Region disaster recovery, or assume that a cross-Region Read Replica provides automatic failover, when in fact it requires manual intervention and does not meet the 'automatic failover' requirement.
Detailed technical explanation
How to think about this question
Aurora Global Database uses a storage-based replication mechanism that asynchronously replicates data from the primary cluster to secondary clusters in up to five AWS Regions, with a Recovery Point Objective (RPO) of typically less than 1 second and a Recovery Time Objective (RTO) of as low as 1 minute during a managed failover. The secondary cluster can be promoted to primary in under a minute, and read traffic can be offloaded to the secondary Region during normal operations. This contrasts with standard RDS cross-Region Read Replicas, which rely on PostgreSQL native streaming replication and require manual promotion with potential data loss.
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 DEA-C01 question test?
Data Store Management — This question tests Data Store Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Amazon Aurora Global Database with a primary cluster in one Region and a secondary in another. — Amazon Aurora Global Database is designed for cross-Region disaster recovery, replicating data with a typical latency of under one second and providing automatic failover from the primary Region to a secondary Region. This meets the requirement of high availability with automatic failover during a regional outage, unlike standard RDS options which lack built-in cross-Region automatic failover.
What should I do if I get this DEA-C01 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
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