AWS Certified Cloud Practitioner — Question 726

A company deploys its application to multiple AWS Regions and configures automatic failover between those Regions.

Which cloud concept does this architecture represent?

Answer options

• A. Security
• B. Reliability
• C. Scalability
• D. Cost optimization

Correct answer: B

Explanation

Deploying applications across multiple AWS Regions with automatic failover ensures high availability and disaster recovery, which are key components of the Reliability pillar. While scalability, security, and cost optimization are important cloud concepts, they do not directly describe the ability of a system to recover from infrastructure failures as reliability does.