AWS - SNS and SQS
You want to ensure that an SNS topic triggers a Lambda function only after the user confirms their email subscription. Which setup achieves this?
You want to ensure that an SNS topic triggers a Lambda function only after the user confirms their email subscription. Which setup achieves this?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Understand subscription confirmation flow
Email subscriptions require user confirmation before receiving messages.Step 2: Separate subscriptions for email and Lambda
Subscribing both email and Lambda separately ensures Lambda triggers regardless of email confirmation, but email messages require confirmation.Step 3: Achieve Lambda trigger only after email confirmation
By subscribing both, Lambda can process messages after email confirmation if logic is implemented accordingly.Final Answer:
Subscribe the email endpoint and separately subscribe the Lambda function to the same topic -> Option BQuick Check:
Separate subscriptions allow independent confirmation and triggers [OK]
Quick Trick: Use separate subscriptions for email and Lambda to control flow [OK]
Common Mistakes:
- Using email protocol for Lambda
- Expecting Lambda to confirm email
- Subscribing Lambda as email endpoint
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