Synchronization on AWS Lambda function

Question

Consider I have a static website on S3 with a button Register in my website which calls an AWS Lambda function via API. I want that Lambda function to handle multiple requests sequentially, not concurrently. ie, if it finishes the work for 1 request then only it will start working for other requests and so on and I will show on website that "Your request has been taken".

Answer 1

The short answer is yes. Just set lambda concurrency to 1