Which option would enable DynamoDB table updates to trigger the Lambda function?

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In: DVA-C01
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A Developer has been asked to create an AWS Lambda function that is triggered any time updates are made to items in an Amazon DynamoDB table.The function has been created, and appropriate permissions have been added to the Lambda execution role.Amazon DynamoDB streams have been enabled for the table, but the function is still not being triggered.

Which option would enable DynamoDB table updates to trigger the Lambda function?

Change the StreamViewType parameter value to NEW_AND_OLD_IMAGES for the DynamoDB table

Configure event source mapping for the Lambda function

Map an Amazon SNS topic to the DynamoDB streams

Increase the maximum execution time (timeout) setting of the Lambda function

Explanations:

TheStreamViewTypeparameter defines the data returned by the stream (e.g., NEW_IMAGE, OLD_IMAGE). Changing this would not directly enable Lambda to be triggered.

Event source mapping connects DynamoDB Streams to the Lambda function. This is the correct configuration for triggering Lambda on table updates.

Mapping an SNS topic to DynamoDB Streams is unnecessary. Lambda can be triggered directly from DynamoDB Streams without SNS.

Increasing the timeout does not address the issue of Lambda not being triggered. Event source mapping is the solution.

2026-04-05

2 Comments

  1. Zachary
    Author

    I calculate that the answer is:
    Configure event source mapping for the Lambda function

  2. Richard
    Author

    As I understand it, the answer is:
    Configure event source mapping for the Lambda function

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