If in doubt between E or F. S3 doesn't support server-side scripts, PHP is a server-side script. The answer is ACE. https://docs.aws.amazon.com/AmazonS3/latest/userguide/WebsiteHosting.html

Option B (Amazon ECS) is not the best option since the website "can be idle for a long time", so Lambda (Option A) is a more cost-effective choice. Option D is incorrect because User pools are for authentication (identity verification) while Identity pools are for authorization (access control). Option F is wrong because S3 web hosting only supports static web files like HTML/CSS, and does not support PHP or JavaScript.

I will go for A C E

A: App may be idle for long time so Lambda is perfect (charge per invocation) C: Cognito user pool for user auth E: Amplify is low code web dev tool B: Wrong, too much cost when idle D: Identity pool is session management/identification. Does not help with auth. F: S3 + PHP doesn't work also no security

https://docs.aws.amazon.com/AmazonS3/latest/userguide/WebsiteHosting.html S3 doesn't support server-side scripting

User Pool = authentication Identity Pool = authorization

A D F: A: for hosting the dynamic content of the app. Pay as execution D: for granting temporary privilege access to users who has paid a fee. F: for hosting the static content of the app

ACE is correct answer

C) Create an Amazon Cognito user pool to authenticate users. E) Use AWS Amplify to serve the frontend web content with HTML, CSS, and JS. Use an integrated CloudFront configuration. F) Use Amazon S3 static web hosting with PHP, CSS, and JS. Use Amazon CloudFront to serve the frontend web content.

Build a web application = AWS Amplify Sign in users = Amazon Cognito user pool Traffic can be idle for a long time = AWS Lambda Amazon S3 does not support server-side scripting such as PHP, JSP, or ASP.NET. https://docs.aws.amazon.com/AmazonS3/latest/userguide/WebsiteHosting.html?icmpid=docs_amazons3_console#:~:text=website%20relies%20on-,server%2Dside,-processing%2C%20including%20server Traffic can be idle for a long time = AWS Lambda

Use exclusion method: No need for Container (no need run all time), remove B. PHP cannot run with static Amazon S3, remove F. Use selection method: Idle for sometime, choose AWS Lambda, choose A. “Amazon Cognito is an identity platform for web and mobile apps.” (https://docs.aws.amazon.com/cognito/latest/developerguide/what-is-amazon-cognito.html ), choose C. Create an identity pool https://docs.aws.amazon.com/cognito/latest/developerguide/tutorial-create-identity-pool.html . AWS Amplify https://aws.amazon.com/amplify/ for build full-stack web-app in hours.

Ans: ACF use AWS SDK for PHP/JS with S3 https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/php_s3_code_examples.html

Answer is ACE

Lambda =serverless User Pool = For user authentication Amplify = hosting web/mobile apps

S3 doesn't support PHP as stated in answer F. https://docs.aws.amazon.com/AmazonS3/latest/userguide/WebsiteHosting.html

I don't think S3 can handle anything dynamic such as PHP. So I go for ACE

ACF no doubt. Check the difference between user pools and identity pools.