AWS Certified Solutions Architect - Associate
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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.)
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UAnonymous
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.
Explanation:
Explanation
Correct Answers: A and C
A. Deploy Amazon CloudFront for content delivery and caching - This is correct because:
- CloudFront is a global Content Delivery Network (CDN) that caches content at edge locations closer to users
- Reduces latency and improves playback performance for mobile users
- Minimizes buffering by serving content from nearby edge locations
- Provides scalability automatically without operational overhead
- Integrates seamlessly with S3 as an origin
C. Use Amazon Elastic Transcoder to convert the video files to more appropriate formats - This is correct because:
- Raw video files are typically large and not optimized for streaming
- Elastic Transcoder can convert videos to formats optimized for mobile streaming (like H.264/MP4)
- Can create adaptive bitrate streaming formats for different network conditions
- Reduces file sizes significantly, decreasing bandwidth requirements
- Managed service with minimal operational overhead
Why other options are incorrect:
B. Use AWS DataSync to replicate the video files across AWS Regions in other S3 buckets - This doesn't solve the core problems:
- Replication adds cost without addressing buffering issues
- Raw files remain large and unoptimized
- Doesn't improve delivery performance to mobile users
D. Deploy an Auto Scaling group of Amazon EC2 instances in Local Zones for content delivery and caching - This is inefficient:
- CloudFront is a managed CDN service that's more cost-effective
- Requires operational overhead to manage EC2 instances
- Local Zones have limited coverage compared to CloudFront's global edge network
E. Deploy an Auto Scaling group of Amazon EC2 instances to convert the video files to more appropriate formats - This is inefficient:
- Elastic Transcoder is a managed service specifically designed for video transcoding
- Managing EC2 instances for transcoding requires significant operational overhead
- Doesn't scale as efficiently as a managed service
Key Architecture Principles:
- Optimize content delivery with CloudFront (CDN)
- Optimize content format with Elastic Transcoder (video processing)
- Minimize operational overhead by using managed AWS services
- Improve mobile performance through reduced file sizes and edge caching
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