SAA-C03 Q169 · Serverless

Question

A media company hosts a mobile app backend in the AWS Cloud. The company is releasing a new feature to allow users to upload short videos and apply special effects by using the mobile app. The company uses AWS Amplify to store the videos that customers upload in an Amazon S3 bucket. The videos must be processed immediately. Users must receive a notification when processing is finished. Which solution will meet these requirements?

Accepted Answer

Option C satisfies every requirement:

1. **Immediate processing**: An S3 event notification triggers a Lambda function the moment a video is uploaded. This is event-driven and near real-time — no polling, no scheduling delay.

2. **Video processing**: AWS Lambda can handle short video processing tasks (up to 15 minutes runtime, up to 10 GB memory). Since the videos are described as 'short videos,' Lambda is appropriate.

3. **Save processed videos**: Lambda writes the processed output back to the S3 bucket (or a different prefix/bucket).

4. **Push notifications**: Amazon SNS supports mobile push notifications (APNs for iOS, FCM for Android). SNS is the standard AWS service for sending push notifications to mobile devices at scale.

**Why C over D?** The key differentiator is the notifica

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