You work as a system administrator for a company. You have just provisioned a fleet of EC2 instances in a single subnet and realized that none of them have a public IP address. What settings would need to be changed for the next fleet of instances to be created with public IP addresses?

Answer options:

A.Modify the auto-assign public IP setting on the subnet.
B.Modify the auto-assign public IP setting on the instance type.
C.Modify the auto-assign public IP setting on the route table.
D.Modify the auto-assign public IP setting on the VPC.

Answer – A
This is given in the AWS Documentation.
This setting is done at the subnet level. If it is marked as true, all instances launched in that subnet will get a public IP address by default.
Because of what is mentioned in the AWS Documentation, all other options are incorrect.
For more information on IP addressing in a subnet, please refer to the below URL-
https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/vpc-ip-addressing.html