Which command would you use in CloudFormation to output the DNS name of your load balancer?

The command to output the DNS name of your load balancer in AWS CloudFormation is indeed identified as FN::GetAtt. This intrinsic function retrieves the value of an attribute from a resource in the template. In the case of a load balancer, you can use FN::GetAtt to obtain various attributes, one of which is the DNS name.

When defining a load balancer in your CloudFormation template, you can specify resources such as an Elastic Load Balancer. By employing FN::GetAtt, you can access the DNSName attribute, allowing you to dynamically output the DNS name of the load balancer once the stack is created. This is particularly useful for configuration management or when you need to reference the load balancer's DNS name in other parts of your infrastructure.

The other options are not valid for retrieving the DNS name. "GetAtt" is incomplete since it should be prefixed with "Fn::" to form the correct intrinsic function syntax. "FN::GetAttribute" is also not a recognized intrinsic function in CloudFormation. "GetOutput" does not exist as a function and does not correctly correspond to the desired outcome of outputting the DNS name. Thus, FN::GetAtt is the correct and functional choice for this task