AWS Certified Solutions Architect – Associate (SAA-C02) — Question 748

A company is creating a new web application for its subscribers. The application will consist of a static single page and a persistent database layer. The application will have millions of users for 4 hours in the morning, but the application will have only a few thousand users during the rest of the day. The company's data architects have requested the ability to rapidly evolve their schema.
Which solutions will meet these requirements and provide the MOST scalability? (Choose two.)

Answer options

• A. Deploy Amazon DynamoDB as the database solution. Provision on-demand capacity.
• B. Deploy Amazon Aurora as the database solution. Choose the serverless DB engine mode.
• C. Deploy Amazon DynamoDB as the database solution. Ensure that DynamoDB auto scaling is enabled.
• D. Deploy the static content into an Amazon S3 bucket. Provision an Amazon CloudFront distribution with the S3 bucket as the origin.
• E. Deploy the web servers for static content across a fleet of Amazon EC2 instances in Auto Scaling groups. Configure the instances to periodically refresh the content from an Amazon Elastic File System (Amazon EFS) volume.

Correct answer: A, D

Explanation

Amazon S3 combined with Amazon CloudFront provides the most scalable, serverless, and cost-effective method for hosting static single-page applications. For the database, Amazon DynamoDB's schema-less nature allows for rapid schema evolution, and its on-demand capacity mode instantly scales to handle millions of morning users without the scaling lag associated with standard DynamoDB auto-scaling or Aurora Serverless. Hosting static content on EC2 instances with EFS is overly complex and less scalable than S3 and CloudFront.