DynamoDB - with Serverless
Which of the following is the correct way to configure a Lambda function to trigger on DynamoDB table changes?
Which of the following is the correct way to configure a Lambda function to trigger on DynamoDB table changes?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Identify how DynamoDB triggers Lambda
DynamoDB Streams capture table changes and can be linked to Lambda as event sources.Step 2: Evaluate options
Only setting up a DynamoDB Stream and attaching it to Lambda is correct; others are invalid or impossible.Final Answer:
Set up a DynamoDB Stream and attach it as an event source to the Lambda function -> Option BQuick Check:
DynamoDB Stream triggers Lambda = A [OK]
Quick Trick: Use DynamoDB Streams to trigger Lambda functions [OK]
Common Mistakes:
MISTAKES- Assuming Lambda can be called directly by DynamoDB without streams
- Thinking Lambda polls DynamoDB instead of event-driven
- Believing DynamoDB runs Lambda code internally
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