Q64 — AWS SOA-C02 Ch.1

Question 64 of 100 | ← Chapter 1

A company has 10 Amazon EC2 instances in its production account. A SysOps administrator must ensure that email notifications are sent to administrators each time there is an EC2 instance state change. Which solution will meet these requirements?

• A. Configure an Amazon Route 53 simple routing policy that publishes a message to an Amazon Simple Notification Service (Amazon SNS) topic when an EC2 instance state changes. This SNS topic then sends notifications to its email subscribers.
• B. Configure an Amazon Route 53 simple routing policy that publishes a message to an Amazon Simple Queue Service (Amazon SQS) queue when an EC2 instance state changes. This SQS queue then sends notifications to its email subscribers.
• C. Create an Amazon EventBridge (Amazon CloudWatch Events) rule that publishes a message to an Amazon Simple Notification Service (Amazon SNS) topic when an EC2 instance state changes. This SNS topic then sends notifications to its email subscribers. ✓
• D. Create an Amazon EventBridge (Amazon CloudWatch Events) rule that publishes a message to an Amazon Simple Queue Service (Amazon SQS) queue when an EC2 instance state changes. This SQS queue then sends notifications to its email subscribers.

Correct Answer: C. Create an Amazon EventBridge (Amazon CloudWatch Events) rule that publishes a message to an Amazon Simple Notification Service (Amazon SNS) topic when an EC2 instance state changes. This SNS topic then sends notifications to its email subscribers.

Explanation

AWS服务中，Amazon EventBridge（原CloudWatch Events）可监控AWS资源的变更事件并触发操作。当EC2实例状态变化时，EventBridge能捕获对应事件模式（如aws.ec2）并通过规则将事件路由到目标服务。Amazon SNS支持向订阅者发送邮件通知，而SQS主要用于消息队列处理，不具备直接发送邮件的功能。根据AWS官方文档，当需要基于事件触发通知时，EventBridge+SNS是标准解决方案。选项C的组合正确实现了事件捕获和通知传递，其余选项中的Route 53（DNS服务）或SQS（队列服务）不符合场景需求。