Question

A retail application stores each order as an item in a DynamoDB table. The team wants a Lambda function to update a running total of daily sales in a separate aggregation table every time a new order is inserted. The function needs access to the full attribute values of each newly created order item. Which configuration correctly delivers this data to the Lambda function?

Accepted Answer

Enable a DynamoDB Stream with the StreamViewType set to NEW_IMAGE and create an event source mapping to the Lambda function.

Answer

Enable a DynamoDB Stream with the StreamViewType set to KEYS_ONLY and create an event source mapping to the Lambda function.

Answer

Configure the DynamoDB table to publish item changes directly to an SNS topic that triggers the Lambda function.

Answer

Enable DynamoDB TTL on the orders table so that expired items invoke the Lambda function with their attribute values.