What would be the output when you deploy a CloudFormation template to create a VPC with two separate subnets in CIDR ranges of 10.0.0.0/16 and 10.0.1.0/24?

Answer options:

A.The template will give an error during the design stage.
B.The template will give a deployment error when creating the subnet and leave the VPC as created.
C.The template will give a deployment error and all resources will be rolled back.
D.The template will deploy successfully.

Answer - C
Here, since there are overlapping CIDR blocks, the template deployment will fail, and all resources will be rolled back.
Option A is invalid because if the JSON template is valid in the syntax, it will proceed ahead.
Option B is invalid because when an error occurs, all resources will be rolled back by default.
Option D is invalid because it will give an error because of overlapping CIDR blocks.
For more information on Cloudformation key concepts, please refer to the below URL:
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cfn-whatis-concepts.html