Final answer:
To make an AWS Lambda function respond to updates in an Amazon DynamoDB table, you can use Amazon DynamoDB Streams. Enable a DynamoDB Stream on your table and configure your Lambda function to be triggered by the stream.
Step-by-step explanation:
To make an AWS Lambda function respond to updates in an Amazon DynamoDB table, you can use Amazon DynamoDB Streams. DynamoDB Streams is an optional feature that captures a time-ordered sequence of item-level modifications in a table.
You can enable a DynamoDB Stream on your table and configure your Lambda function to be triggered by the stream. The Lambda function will be invoked whenever there is an update to the table, allowing you to perform custom actions based on the updates.
For example, you can write a Lambda function that sends a notification whenever a record in the DynamoDB table is updated. This function can be triggered by the DynamoDB Stream and perform the necessary actions to send the notification.