A company uses the AWS SDK for JavaScript in the Browser to build a web application and then hosts the application on Amazon S3. The company wants the application to support 10,000 users…

Question

Options

• ACreate a user cookie. Attach an IAM role to the S3 bucket that hosts the application.
• BDeploy an Amazon CloudFront distribution with an origin access identity (OAI) to access the S3
• CConfigure and use Amazon Cognito. Access DynamoDB with the authenticated users.
• DCreate an IAM user for each user. Use fine-grained access control on the DynamoDB table to

• A
  2% (1)
• B
  9% (5)
• C
  83% (44)
• D
  6% (3)

Explanation

This will allow the application to support 10,000 users concurrently and will provide a unique identifier for each user. By using Amazon Cognito, the company can authenticate users and then access DynamoDB with the authenticated users to store their preferences in a table. This approach will allow the company to control access to the DynamoDB table and to scale to any number of users. Creating a user cookie or deploying an Amazon CloudFront distribution with an OAI would not solve the problem because these solutions do not provide a way to uniquely identify users or control access to DynamoDB. Creating an IAM user for each user and using fine- grained access control on the DynamoDB table would not be practical or scalable because it would require the company to manage and maintain a large number of IAM users. When dealing with user profiles in serverless applications we often turn to Cognito for managing their credentials while the app itself will store user entities.

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