Which AWS service automatically scales to meet demands for compute capacity?

The correct choice is EC2 Auto Scaling, which is specifically designed to automatically adjust the number of Amazon EC2 instances in response to current demand for compute capacity. It monitors the application’s demand and scales the number of instances up or down to ensure that the required performance is maintained while optimizing costs.

EC2 Auto Scaling works in conjunction with other AWS services, such as Elastic Load Balancing, to distribute incoming application traffic across instances effectively. This ensures that, during peak usage times, more instances can be launched automatically to handle the load, while during quieter periods, it can reduce the number of instances to save costs. It provides added flexibility and reliability to applications by ensuring that the right amount of resources are available at all times.

Elastic Beanstalk is not strictly an automatic scaling service; while it does manage scaling as part of its functionality, it is more focused on deploying applications rather than solely on scaling compute capacity. AWS Lambda provides automatic scaling in a different context, as it scales automatically but is intended for serverless architectures and does not involve traditional EC2 instances. CloudFormation is a service used for orchestration and deployment of AWS resources through templates; it does not handle dynamic scaling of compute capacity on its own.

Therefore, EC2 Auto Scaling is