[Solved] What happens when an Amazon SNS topic is configured as a trigger for a Lambda function? — Ans: Lambda runs when a message is published to the SNS topic | AWS

AWS - Lambda

What happens when an Amazon SNS topic is configured as a trigger for a Lambda function?

ALambda runs on a fixed schedule

BLambda runs only when the SNS topic is deleted

CLambda runs when an S3 bucket is updated

DLambda runs when a message is published to the SNS topic

Step-by-Step Solution

Solution:

Step 1: Understand SNS trigger behavior
When a message is published to an SNS topic, it triggers the connected Lambda function.
Step 2: Check other options for correctness
Lambda does not run on SNS topic deletion, S3 updates trigger S3 events, and fixed schedules use EventBridge.
Final Answer:
Lambda runs when a message is published to the SNS topic -> Option D
Quick Check:
SNS message triggers Lambda = True [OK]

Quick Trick: SNS triggers Lambda on message publish, not deletion or schedule [OK]

Common Mistakes:

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What happens when an Amazon SNS topic is configured as a trigger for a Lambda function?