You are creating a cloudformation templates which takes in a database password as a parameter. How can you ensure that the password is not visible when anybody tries to describes the stack

Answer options:

A.Use the password attribute for the resource
B.Use the NoEcho property for the parameter value
C.Use the hidden property for the parameter value
D.Set the hidden attribute for the Cloudformation resource.

Answer - B
The AWS Documentation mentions
For sensitive parameter values (such as passwords), set the NoEcho property to true. That way, whenever anyone describes your stack, the parameter value is shown as asterisks (*****).
For more information on Cloudformation parameters, please visit the below URL:
 http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/parameters-section-structure.html