Exam AWS Certified SysOps Administrator - Associate topic 1 question 14 discussion

C sounds like the best option. Tested it as well.

Answer is C

C. Create an Amazon CloudWatch alarm to publish a message to an Amazon Simple Notification Service (Amazon SNS) topic to alert the application team when the Invocations metric of the Lambda function is zero for an hour. Configure the alarm to treat missing data as breaching.

No point sending to other Lambda functions when it cant even trigger the actual Lambda function! C is the most sane answer.

This solution is the most operationally efficient as it uses a simple and straightforward approach to check if the data file is not arriving on time. The new Lambda function can be created with minimal configuration, and the Amazon CloudWatch Events rule can be set up to trigger the function hourly. If the timestamp of the newest file in the S3 bucket is more than an hour ago, the function will publish a message to an Amazon SNS topic to notify the application team. This approach avoids complex configurations and dependencies on other AWS services, making it easier to manage and maintain over time.

C simple and clean as f*

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Ans: C

I vote C