When a validation of a field in a Rails model fails, where are the messages for validation errors stored?

How would you generate a drop-down menu that allows the user to select from a collection of product names?

For a Rails validator, how would you define an error message for the model attribute address with the message "This address is invalid"?

Given the URL helper product_path(@product), which statement would be expected to be false?

In Rails, how would you cache a partial template that is rendered?

What is the reason for using Concerns in Rails?

Which prints the 'Hello WORLD!' output with a new line?

is it possible to change the default port when running a rails server ?

What is the default value for a global variable (before initialization)?

Which files is used to specify any default data that should be loaded into the application's database, when it is first setup?

The recommended directory in which to place your app's javascript files is: