You are in charge of designing Cloudformation templates for your company. One of the key requirements is to ensure that if a Cloudformation stack is deleted, a snapshot of the relational database is created which is part of the stack. How can you achieve this in the best possible way?

Answer options:

A.Create a snapshot of the relational database beforehand so that when the cloudformation stack is deleted, the snapshot of the database will be present.
B.Use the Update policy of the cloudformation template to ensure a snapshot is created of the relational database.
C.Use the Deletion policy of the cloudformation template to ensure a snapshot is created of the relational database.
D.Create a new cloudformation template to create a snapshot of the relational database.

Answer – C
The AWS documentation mentions the following.
With the DeletionPolicy attribute, you can preserve or (in some cases) backup a resource when its stack is deleted. You specify a DeletionPolicy attribute for each resource that you want to control. If a resource has no DeletionPolicy attribute, AWS CloudFormation deletes the resource by default. Note that this capability also applies to update operations that lead to resources being removed.
For more information on the Deletion policy, please visit the below URL:
http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-deletionpolicy.html