SAA-C03 Q177 · Serverless

Question

A company runs an ecommerce platform with a monolithic architecture on Amazon EC2 instances. The platform runs web and API services. The company wants to decouple the architecture and enhance scalability. The company also wants the ability to track orders and reprocess any failed orders. Which solution will meet these requirements?

Accepted Answer

**Answer A meets every requirement systematically:**

1. **Decouple the architecture**: SQS acts as a buffer between the web/API tier and the order processing logic. The monolith no longer needs to handle order processing synchronously — it simply sends a message to the queue.

2. **Enhance scalability**: Lambda functions automatically scale based on the number of messages in the SQS queue. No servers to manage or capacity to pre-provision. Lambda scales from 0 to thousands of concurrent executions.

3. **Track orders**: SQS messages represent individual orders. Each message has metadata (message ID, timestamps, attributes) enabling order tracking through the pipeline.

4. **Reprocess failed orders**: This is the **critical differentiator**. An **SQS dead-letter queue (DLQ)** automatically

📖 Explanation

✅ Correct Answer

❌ Wrong Answers

📘 Key Concepts

🏗️ Architecture

⚙️ Operations

💰 Cost

🔒 Security

🎯 Exam Tips