You want to build a real-time notification system using DynamoDB and Lambda. Which event-driven architecture pattern best fits this use case?

hard🚀 Application Q15 of 15

DynamoDB - with Serverless

AUse DynamoDB Streams to capture changes and trigger Lambda to send notifications

BUse periodic polling of DynamoDB to check for changes and send notifications

CUse DynamoDB Global Tables to replicate data and notify users

DUse DynamoDB backups to trigger notifications on data changes

Step-by-Step Solution

Solution:

Step 1: Identify real-time event-driven pattern
Real-time notifications require immediate reaction to data changes.
Step 2: Match pattern with DynamoDB Streams and Lambda
Streams capture changes as events; Lambda processes them instantly to notify users.
Final Answer:
Use DynamoDB Streams to capture changes and trigger Lambda to send notifications -> Option A
Quick Check:
Streams + Lambda = real-time notifications [OK]

Quick Trick: Streams trigger Lambda for instant notifications [OK]

Common Mistakes:

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