AWS Certified Solutions Architect – Professional — Question 480

A company needs to store and process image data that will be uploaded from mobile devices using a custom mobile app. Usage peaks between 8 AM and 5 PM on weekdays, with thousands of uploads per minute. The app is rarely used at any other time. A user is notified when image processing is complete.
Which combination of actions should a solutions architect take to ensure image processing can scale to handle the load? (Choose three.)

Answer options

• A. Upload files from the mobile software directly to Amazon S3. Use S3 event notifications to create a message in an Amazon MQ queue.
• B. Upload files from the mobile software directly to Amazon S3. Use S3 event notifications to create a message in an Amazon Simple Queue Service (Amazon SQS) standard queue.
• C. Invoke an AWS Lambda function to perform image processing when a message is available in the queue.
• D. Invoke an S3 Batch Operations job to perform image processing when a message is available in the queue.
• E. Send a push notification to the mobile app by using Amazon Simple Notification Service (Amazon SNS) when processing is complete.
• F. Send a push notification to the mobile app by using Amazon Simple Email Service (Amazon SES) when processing is complete.

Correct answer: B, C, E

Explanation

Uploading files directly to Amazon S3 and using Amazon SQS standard queues (Option B) provides a highly scalable and decoupled buffer to handle peak traffic bursts. AWS Lambda (Option C) automatically scales to process these SQS messages efficiently, and Amazon SNS (Option E) is the appropriate service for sending push notifications directly to mobile devices. Amazon MQ (Option A) is less suited for this serverless pattern, Amazon SES (Option F) is for email rather than push notifications, and S3 Batch Operations (Option D) is designed for large-scale batch actions rather than real-time message processing.