Exam AWS-SysOps topic 1 question 590 discussion

D is correct

https://docs.aws.amazon.com/AmazonCloudWatch/latest/events/RunLambdaSchedule.html

Amazon CloudWatch allows you to schedule events at specified intervals using cron or rate expressions. You can create a CloudWatch scheduled event with a cron expression that triggers the Lambda function at the desired interval, in this case, every 15 minutes. By configuring the CloudWatch scheduled event to invoke the Lambda function, you can ensure that the function runs automatically and at the specified frequency without the need for additional infrastructure or manual intervention. This is a cost-effective and efficient way to schedule and automate the execution of the Lambda function.

Old question, now its Event Bridge. https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-run-lambda-schedule.html

It would be EventBridge now

D is the answer CW events rules allows you to schedule events that can trigger many different actions into aws services

Answer "D". CloudWatch Events scheduler works like CRON jobs. So, this is the easiest way to trigger Lambda functions periodically.

D. Create an Amazon CloudWatch scheduled event to invoke the Lambda function.

I'll go with D

D. Create an Amazon CloudWatch scheduled event to invoke the Lambda function.

You can create rules that self-trigger on an automated schedule in CloudWatch Events using cron or rate expressions. All scheduled events use UTC time zone and the minimum precision for schedules is 1 minute. CloudWatch Events supports cron expressions and rate expressions. Rate expressions are simpler to define but don't offer the fine-grained schedule control that cron expressions support. For example, with a cron expression, you can define a rule that triggers at a specified time on a certain day of each week or month. In contrast, rate expressions trigger a rule at a regular rate, such as once every hour or once every day.

Thanks Saumen for providing the reference.