How do you implement the most cost-efficient architectu…

Your website is serving on-demand training videos to your workforce. Videos are uploaded monthly in high
resolution MP4 format. Your workforce is distributed globally often on the move and using company-provided
tablets that require the HTTP Live Streaming (HLS) protocol to watch a video. Your company has no video
transcoding expertise and it required you may need to pay for a consultant.
How do you implement the most cost-efficient architecture without compromising high availability and quality of
video delivery’?

A.
A video transcoding pipeline running on EC2 using SQS to distribute tasks and Auto Scaling to adjust the
number of nodes depending on the length of the queue. EBS volumes to host videos and EBS snapshots to
incrementally backup original files after a few days. CloudFront to serve HLS transcoded videos from EC2.

B.
Elastic Transcoder to transcode original high-resolution MP4 videos to HLS. EBS volumes to host videos
and EBS snapshots to incrementally backup original files after a few days. CloudFront to serve HLS
transcoded videos from EC2.

C.
Elastic Transcoder to transcode original high-resolution MP4 videos to HLS. S3 to host videos with Lifecycle
Management to archive original files to Glacier after a few days. CloudFront to serve HLS transcoded
videos from S3.

D.
A video transcoding pipeline running on EC2 using SQS to distribute tasks and Auto Scaling to adjust the
number of nodes depending on the length of the queue. S3 to host videos with Lifecycle Management to
archive all files to Glacier after a few days. CloudFront to serve HLS transcoded videos from Glacier.