AWS Certified Cloud Practitioner — Question 374

An ecommerce company is using Amazon EC2 Auto Scaling groups to manage a fleet of web servers running on Amazon EC2.

This architecture follows which AWS Well-Architected Framework best practice?

Answer options

• A. Secure the workload
• B. Decouple infrastructure components
• C. Design for failure
• D. Think parallel

Correct answer: C

Explanation

Using Amazon EC2 Auto Scaling groups ensures that if an EC2 instance fails, it is automatically detected and replaced with a healthy one, which directly aligns with the 'Design for failure' best practice. This approach guarantees high availability and fault tolerance by assuming that individual components will eventually experience issues. The other choices, such as decoupling components or securing the workload, represent different design principles that are not the primary focus of Auto Scaling's self-healing capabilities.