Exam AWS Certified Developer - Associate DVA-C02 topic 1 question 96 discussion

This solution will allow the developer to receive notifications for each image uploaded to the S3 bucket, and also create a thumbnail using the Lambda function. The SNS topic will serve as a trigger for both the Lambda function and the email notification subscription. When an image is uploaded, S3 will send a notification to the SNS topic, which will trigger the Lambda function to create the thumbnail and also send an email notification to the specified email address.

B) Eliminated - The SQS queue is not required because SNS can directly notify both the Lambda function and the email service C) Eliminated - SQS cannot send email notifications. Also, The Lambda function would need to poll the SQS queue, adding unnecessary complexity. D) Eliminated - Using EventBridge to forward S3 event notifications introduces unnecessary complexity.

None of these is really an optimal solution to the problem, which is a little annoying really

A is the correct answer.

SNS can be used to fan out notifications. When an image is uploaded to the S3 bucket, an event notification is sent to the SNS topic. The Lambda function is subscribed to this topic to create a thumbnail, and an email subscription can also be configured on the same SNS topic to send email notifications. This approach meets all requirements with minimal components.