- A
Amazon RDS Multi-AZ
Why wrong: Amazon RDS Multi-AZ provides high availability within a single region, not multi-region disaster recovery or global low-latency.
- B
Amazon ElastiCache for Redis global datastore
Why wrong: Amazon ElastiCache for Redis global datastore is a caching solution, not a persistent database, and is not suitable as a primary database for global low-latency writes.
- C
Amazon DynamoDB global tables
Amazon DynamoDB global tables is the correct choice as it offers active-active replication across multiple regions, supporting low-latency reads and writes from any region and surviving regional outages.
- D
Amazon Aurora Global Database
Why wrong: Amazon Aurora Global Database has a single primary region for writes, so writes are not low-latency globally; it is more suited for read-heavy global applications with a single write region.
Aurora Global Database for Low-Latency Writes and Regional Disaster Recovery
This SAP-C02 practice question tests your understanding of design for new solutions. 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. A key principle to apply: dynamoDB global tables. 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 is designing a new multi-region application that requires a global database with low-latency reads and writes. The application must be able to survive a regional outage. Which database solution should they choose?
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
Amazon DynamoDB global tables
Amazon DynamoDB global tables provide a fully managed, multi-region, multi-primary database that delivers low-latency reads and writes globally. The service replicates data across multiple AWS Regions automatically, allowing writes to be performed in any region with conflict resolution. In the event of a regional outage, traffic can be directed to another region, ensuring high availability. In contrast, Amazon Aurora Global Database has a single primary region for writes, so writes are not low-latency across regions.
Key principle: DynamoDB global tables
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon RDS Multi-AZ
Why it's wrong here
Amazon RDS Multi-AZ provides high availability within a single region, not multi-region disaster recovery or global low-latency.
- ✗
Amazon ElastiCache for Redis global datastore
Why it's wrong here
Amazon ElastiCache for Redis global datastore is a caching solution, not a persistent database, and is not suitable as a primary database for global low-latency writes.
- ✓
Amazon DynamoDB global tables
Why this is correct
Amazon DynamoDB global tables is the correct choice as it offers active-active replication across multiple regions, supporting low-latency reads and writes from any region and surviving regional outages.
Related concept
DynamoDB global tables
- ✗
Amazon Aurora Global Database
Why it's wrong here
Amazon Aurora Global Database has a single primary region for writes, so writes are not low-latency globally; it is more suited for read-heavy global applications with a single write region.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often choose Aurora Global Database because it supports global reads and regional failover, but they overlook that the requirement for low-latency writes globally is better met by DynamoDB global tables' active-active model.
Detailed technical explanation
How to think about this question
Aurora Global Database uses a dedicated replication channel that bypasses the database engine's buffer cache, achieving sub-second replication latency even across continents. The failover process involves promoting a secondary region to read/write using the 'Failover Global Cluster' operation, which typically completes in less than one minute. Under the hood, Aurora uses a distributed storage volume per region, and only redo log records are shipped across regions, minimizing network overhead.
KKey Concepts to Remember
- DynamoDB global tables
- Active-active replication
- Regional outage survivability
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
DynamoDB global tables
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.
Review dynamoDB global tables, then practise related SAP-C02 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this SAP-C02 question test?
Design for New Solutions — This question tests Design for New Solutions — DynamoDB global tables.
What is the correct answer to this question?
The correct answer is: Amazon DynamoDB global tables — Amazon DynamoDB global tables provide a fully managed, multi-region, multi-primary database that delivers low-latency reads and writes globally. The service replicates data across multiple AWS Regions automatically, allowing writes to be performed in any region with conflict resolution. In the event of a regional outage, traffic can be directed to another region, ensuring high availability. In contrast, Amazon Aurora Global Database has a single primary region for writes, so writes are not low-latency across regions.
What should I do if I get this SAP-C02 question wrong?
Review dynamoDB global tables, then practise related SAP-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
DynamoDB global tables
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Last reviewed: Jul 4, 2026
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