You have been asked to design a serverless web application with DynamoDB as its database. The client wants to record each and every change in data in DynamoDB and store it individually as a file on S3. How can you achieve this?

Answer options:

A.Write a script that will record each and every create or update request and store it on S3.
B.Enable DynamoDB streams and attach them to Lambda which will read the data and store it on S3.
C.Enable DynamoDB streams and set the destination to S3. This will automatically store each change on S3.
D.Use DynamoDB binary logging feature to record each and every change on S3.

Correct Answer: B
You can enable DynamoDB streams to record both old and new image and send it to a Lambda function which can store the changes on S3.
Option A is incorrect: This is not an ideal choice because the same can be implemented using DynamoDB streams.
Option C is incorrect: DynamoDB stream only supports Lambda as a target as of writing this question.
Option D is incorrect: DynamoDB does not support binary logging. This feature is only supported for SQL databases.
Reference: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Streams.Lambda.html