A city outage notification system must deliver the same alert to SMS subscribers, email lists, and a Lambda function that writes an audit record. Which pattern fits?
Select an answer to reveal the explanation.
Short Explanation
One megaphone, many ears: SNS fans the same outage message to SMS, email, and Lambda without a brittle cron chain. A lone SQS consumer reinventing every channel misses the pub/sub point.
Full Explanation
Amazon SNS pub/sub fan-out delivers each published message to multiple heterogeneous subscriptions such as SMS, email, and Lambda. Sequential hard-coded calls, disk polling, or a single SQS consumer that must implement every channel tightly couple delivery and reduce resilience.