AWS DevOps Engineer Professional Practice Test 2025 - Free DevOps Practice Questions and Certification Study Guide

AWS CloudWatch is a comprehensive monitoring and observability service that allows users to collect and track metrics, collect log files, and set alarms. It provides real-time insights into the performance and health of AWS resources. CloudWatch enables users to visualize key metrics, respond to changes in system performance, and maintain overall system reliability. By continuously monitoring resources such as EC2 instances, RDS databases, and more, it allows for immediate awareness of resource utilization and operational issues, which is crucial for maintaining application performance and ensuring uptime.

In contrast, while AWS CloudTrail focuses on governance and auditing by logging API calls, AWS Config provides configuration history and resource compliance checking rather than real-time monitoring. AWS Systems Manager offers operational data and management capabilities but does not primarily focus on real-time resource monitoring like CloudWatch does. Thus, CloudWatch stands out as the central service for real-time monitoring of AWS resources.