Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 285 discussion

Correct answer is B. https://aws.amazon.com/blogs/architecture/create-dynamic-contact-forms-for-s3-static-websites-using-aws-lambda-amazon-api-gateway-and-amazon-ses/

This solution is the most cost-efficient for the anticipated 100 monthly visits because: • API Gateway charges are based on API calls. With only 100 visits, charges would be minimal. • AWS Lambda provides compute time for the backend code in increments of 100ms, so charges would also be negligible for this workload. • Amazon SES is used only for sending emails from the submitted contact forms. SES has a generous free tier of 62,000 emails per month, so there would be no charges for sending the contact emails. • No EC2 instances or other infrastructure needs to be run and paid for.

Option D just made me laugh!

B is the most cost-effective solution for this use case. The key requirements are: Static website hosted on S3 Add a contact form with server-side processing Low traffic website (<100 visits per month.

why not C

B would be cheaper than option D, Member only 100 site visits per month, so you are comparing API GW used 100 times a month with constantly running EC2...

Both api gateway and lambda are serverless so charges apply only on the 100 form submissions per month

After looking at cost of Workmail compared to SES - probably 'B' is better

Create a t2 micro Amazon EC2 instance. Deploy a LAMP (Linux Apache MySQL, PHP/Perl/Python) stack to host the webpage (free open-source). Use client-side scripting to build the contact form. Integrate the form with Amazon WorkMail. This solution will provide the company with the necessary components to host the contact form page and integrate it with Amazon WorkMail at the lowest cost. Option A requires the use of Amazon ECS, which is more expensive than EC2, and Option B requires the use of Amazon API Gateway, which is also more expensive than EC2. Option C requires the use of Amazon Lightsail, which is more expensive than EC2. https://aws.amazon.com/what-is/lamp-stack/

It's B

B allows the company to create an API endpoint using AWS Lambda, which is a cost-effective and scalable solution for a contact form with low traffic. The backend can make a call to Amazon SES to send email notifications, which simplifies the process and reduces complexity.

it is B : https://aws.amazon.com/blogs/architecture/create-dynamic-contact-forms-for-s3-static-websites-using-aws-lambda-amazon-api-gateway-and-amazon-ses/

https://docs.aws.amazon.com/lambda/latest/dg/services-apigateway.html Using AWS Lambda with Amazon API Gateway - AWS Lambda https://docs.aws.amazon.com/lambda/latest/dg/services-apigateway.html https://aws.amazon.com/lambda/faqs/ AWS Lambda FAQs https://aws.amazon.com/lambda/faqs/