Question 6
Domain 1: Cloud ConceptsA company has developed an eCommerce web application in AWS. What should they do to ensure that the application has the highest level of availability?
Correct answer: C
Explanation
AWS reliability guidance says to “consider multi-AZ deployments for high availability,” and AZs provide “high availability and fault tolerance.” Deploying across multiple Regions adds geographic redundancy, improving resilience if an entire Region fails.
Why each option is right or wrong
A. Deploy the application across multiple Availability Zones and Edge locations.
B. Deploy the application across multiple Availability Zones and subnets.
C. Deploy the application across multiple Regions and Availability Zones.
AWS Well-Architected Framework reliability guidance explicitly calls for multi-AZ designs for high availability, and an AZ is defined as an isolated set of data centers with redundant power, networking, and connectivity. Spreading the web application across multiple Regions adds a second layer of geographic redundancy, so an outage affecting an entire Region does not take the application offline; this is the strongest availability posture among the choices.
D. Deploy the application across multiple VPC's and subnets.