AWS DevOps Engineer Professional Practice Test

For an application in Elastic Beanstalk that processes messages from an SQS queue, which environment tier should be used?

1. Web Server Environment tier

2. Worker Environment tier

3. Application Environment tier

4. Database Environment tier

The correct answer is: Worker Environment tier

The Worker Environment tier is the ideal choice for an application in Elastic Beanstalk that processes messages from an SQS queue. This tier is specifically designed to handle background processing tasks, such as those that involve pulling messages from a queue and performing operations based on those messages. When using the Worker Environment tier, your application instances listen to the designated SQS queue and can automatically scale based on the number of messages waiting in the queue. This enables efficient consumption of messages and helps to ensure that the processing workload is distributed across multiple instances, enhancing fault tolerance and performance. In contrast, the Web Server Environment tier is tailored for applications that handle HTTP requests directly, serving web pages or APIs rather than processing background tasks. The Application Environment tier is a more general-purpose environment and doesn't cater specifically to the message processing model. The Database Environment tier is not relevant for processing messages, as it is designed for managing databases rather than application logic or message handling. Overall, the Worker Environment tier is optimized for message-driven architectures, making it the most suitable option for integrating with SQS for message processing tasks.