AWS Certified Cloud Practitioner — Question 787

A company is launching a critical business application in an AWS Region.

How can the company increase resilience for this application?

Answer options

• A. Deploy a copy of the application in another AWS account.
• B. Deploy the application by using multiple VPCs.
• C. Deploy the application by using multiple subnets.
• D. Deploy the application by using multiple Availability Zones.

Correct answer: D

Explanation

Deploying an application across multiple Availability Zones (AZs) increases resilience by ensuring that if one AZ experiences an outage, the application remains operational in another AZ within the same Region. While multiple subnets can be used, they must span different Availability Zones to provide true high availability. Utilizing multiple VPCs or AWS accounts adds administrative complexity without inherently providing the local, low-latency redundancy that multi-AZ deployments offer.