AWS Certified Solutions Architect – Associate (SAA-C02) — Question 615

A company wants to create a mobile app that allows users to stream slow-motion video clips on their mobile devices. Currently, the app captures video clips and uploads the video clips in raw format into an Amazon S3 bucket. The app retrieves these video clips directly from the S3 bucket. However, the videos are large in their raw format.
Users are experiencing issues with buffering and playback on mobile devices. The company wants to implement solutions to maximize the performance and scalability of the app while minimizing operational overhead.
Which combination of solutions will meet these requirements? (Choose two.)

Answer options

• A. Deploy Amazon CloudFront for content delivery and caching.
• B. Use AWS DataSync to replicate the video files across AWS Regions in other S3 buckets.
• C. Use Amazon Elastic Transcoder to convert the video files to more appropriate formats.
• D. Deploy an Auto Scaling group of Amazon EC2 instances in Local Zones for content delivery and caching.
• E. Deploy an Auto Scaling group of Amazon EC2 instances to convert the video files to more appropriate formats.

Correct answer: A, C

Explanation

To resolve buffering issues and reduce file sizes with minimal operational overhead, Amazon Elastic Transcoder should be used to convert raw videos into mobile-friendly formats, and Amazon CloudFront should be deployed to cache and deliver the content globally with low latency. Using EC2 instances for transcoding or caching (Options D and E) increases operational overhead compared to these fully managed serverless solutions. AWS DataSync (Option B) replicates data but does not address video format optimization or edge caching.