AWS Certified Cloud Practitioner — Question 38

A company implements an Amazon EC2 Auto Scaling policy along with an Application Load Balancer to automatically recover unhealthy applications that run on
Amazon EC2 instances.
Which pillar of the AWS Well-Architected Framework does this action cover?

Answer options

• A. Security
• B. Performance efficiency
• C. Operational excellence
• D. Reliability

Correct answer: D

Explanation

The correct answer is D, Reliability, because implementing Auto Scaling and an Application Load Balancer ensures that the system can automatically recover from failures, thus enhancing the application's uptime and stability. The other options, such as Security, Performance efficiency, and Operational excellence, do not directly relate to the automatic recovery of applications and maintaining consistent performance during failures.