A user has created a VPC with CIDR 20.0.0.0/16. The user has created one subnet with CIDR 20.0.0.0/16 in this VPC. The user is trying to create another subnet with the same VPC for CIDR 20.0.0.1/24. What will happen in this scenario?

Answer options:

A.It will throw a CIDR overlap error
B.It is not possible to create a subnet with the same CIDR as the VPC
C.The second subnet will be created
D.The VPC will modify the first subnet to allow this IP range

Answer - A
Since the CIDR overlaps for the first the second subnet, an overlap error will occur
For more information on VPC subnets, please refer to the below link:
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Subnets.html