AWS Technical Essentials Practice

AWS CloudFormation is the feature that automates resource management within AWS. It allows users to define the infrastructure and services they need using a simple text template in JSON or YAML format. This template describes the resources, their configurations, and relationships between them, enabling users to deploy and manage their cloud environments consistently and efficiently.

By using CloudFormation, users can create, update, and delete resources as a single unit, known as a stack. This automation reduces the risk of human error, helps maintain consistency across environments, and simplifies the process of resource provisioning and management. It also supports version control, allowing changes to be tracked over time, which is essential for maintaining and evolving cloud infrastructure.

The other options serve different purposes: CloudTrail is focused on logging and monitoring API calls made in AWS for governance, compliance, and operational auditing; Route 53 is a scalable Domain Name System (DNS) web service that also provides domain registration; and Device Farm is a cloud-based testing service for mobile and web applications. While these services provide valuable functionalities within AWS, they do not primarily focus on automating resource management like CloudFormation does.