AWS Certified Solutions Architect – Professional SAP-C01 – Question343

A user has created a VPC with a public subnet. The user has terminated all the instances which are part of the subnet.
Which of the below mentioned statements is true with respect to this scenario?

A. The subnet to which the instances were launched with will be deleted
B. When the user launches a new instance it cannot use the same subnet
C. The user cannot delete the VPC since the subnet is not deleted
D. Secondary network interfaces attached to the terminated instances may persist.

Correct Answer: D

Explanation:

Explanation: A Virtual Private Cloud (VPC) is a virtual network dedicated to the user’s AWS account. A user can create a subnet with VPC and launch instances inside that subnet. When an instance is launched it will have a network interface attached with it. The user cannot delete the subnet until he terminates the instance and deletes the network interface.
By default, network interfaces that are automatically created and attached to instances using the console are set to terminate when the instance terminates. However, network interfaces created using the command line interface aren’t set to terminate when the instance terminates.
Reference:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-eni.html