What should the solutions architect recommend?
Configure AWS CloudTrail trails to log S3 API calls. Use AWS AppSync to process the files.
Configure an object-created event notification within the S3 bucket to invoke an AWS Lambda function to process the files.
Configure Amazon Kinesis Data Streams to process and send data to Amazon S3. Invoke an AWS Lambda function to process the files.
Configure an Amazon Simple Notification Service (Amazon SNS) topic to process the files uploaded to Amazon S3. Invoke an AWS Lambda function to process the files.
Explanations:
AWS CloudTrail is used for logging AWS API calls and does not provide a mechanism to automatically trigger processing of files uploaded to S3. AWS AppSync is typically used for building APIs and is not suitable for file processing tasks.
Configuring an object-created event notification in the S3 bucket allows for automatic triggering of an AWS Lambda function whenever a new file is uploaded. This setup is efficient and cost-effective for processing files quickly, as Lambda can handle variable loads and execute within seconds.
Amazon Kinesis Data Streams is designed for real-time data streaming and would be more complex and potentially more costly than necessary for simply processing files uploaded to S3. Lambda can be invoked from Kinesis, but it is not the optimal choice for this use case.
While using an Amazon SNS topic can be an effective way to manage notifications, it introduces unnecessary complexity for this scenario. Directly invoking a Lambda function from an S3 event notification is more straightforward and cost-effective than sending an SNS notification first.
I classify that the answer is:
Configure an object-created event notification within the S3 bucket to invoke an AWS Lambda function to process the files.