AWS Certified Solutions Architect – Associate (SAA-C03)Design Resilient ArchitecturesEasy
A global SaaS company is building a new microservices platform on AWS. They need a highly scalable, fully managed service to send notifications to various endpoints (e.g., email, SMS, other microservices) when certain events occur within their system. The service must support fan-out messaging to multiple subscribers simultaneously. Which AWS service should they choose?
- AAmazon SNS
- BAWS Step Functions
- CAmazon Kinesis Data Firehose
- DAmazon SQS
Show answer & explanationAnswer & explanation
Correct answer: A. Amazon SNS
Amazon SNS (Simple Notification Service) is a fully managed messaging service for A2A (Application-to-Application) and A2P (Application-to-Person) communication. It supports fan-out messaging, allowing a single message to be sent to multiple subscribers and endpoint types simultaneously, which perfectly fits the requirement for sending notifications to various endpoints.
Why the other options are wrong
- B. AWS Step Functions is a serverless workflow service for coordinating distributed applications, not a messaging service for notifications.
- C. Amazon Kinesis Data Firehose is for loading streaming data into data stores and analytics services, not for general-purpose notifications.
- D. Amazon SQS is a message queuing service primarily used for decoupling and asynchronous processing, not for fan-out notifications to diverse endpoints.
Amazon SNS
A fully managed messaging service that enables you to send messages to a large number of subscribers simultaneously through a 'fan-out' approach. It supports various endpoint types like email, SMS, HTTP/S endpoints, and AWS Lambda functions.
- Fan-out messaging
- Application-to-Application (A2A)
- Application-to-Person (A2P)
- Supports multiple subscriber types
- Fully managed and scalable
Memory trick: SNS is like a 'speaker' broadcasting to many listeners.