AWS DevOps Engineer Professional Practice Test

What is the benefit of using Lambda to export CloudWatch metrics?

1. It reduces the cost of metrics stored

2. It automates the metric accumulation process

3. It provides additional analytics features

4. It simplifies the retention policy

The correct answer is: It automates the metric accumulation process

Using AWS Lambda to export CloudWatch metrics primarily automates the metric accumulation process. Lambda functions can be triggered based on events, allowing for seamless and automatic retrieval and processing of metrics from CloudWatch. This automation means that users do not have to manually monitor and gather metrics or set up complex polling processes; instead, they can define a Lambda function to handle this task at specified intervals or based on events. By employing Lambda, organizations can also streamline their workflows and decrease the potential for human error that comes with manual processes. This capability is particularly beneficial in dynamic environments where metrics need to be continuously monitored and processed in real-time. While the use of Lambda might correlate with some aspects of the other choices, such as potentially impacting retention policies or providing analytics, the primary and most notable advantage is in the automation of metric accumulation. This automation leads to enhanced operational efficiency and enables teams to focus on more strategic tasks rather than routine metric collection tasks.