AWS Certified Cloud Practitioner (CLF-C02) — Question 317

A solutions architect needs to maintain a fleet of Amazon EC2 instances so that any impaired instances are replaced with new ones.

Which AWS service should the solutions architect use?

Answer options

• A. Amazon Elastic Container Service (Amazon ECS)
• B. Amazon GuardDuty
• C. AWS Shield
• D. AWS Auto Scaling

Correct answer: D

Explanation

AWS Auto Scaling can continuously monitor the health of Amazon EC2 instances and automatically replace any instances that fail health checks to maintain the desired fleet capacity. Amazon ECS is a container orchestration service, Amazon GuardDuty is a threat detection service, and AWS Shield provides DDoS protection, none of which manage EC2 instance replacement.