What is the output of the following? puts 'a\nb'

To randomize the order of entries in an Array, use the _______ method.

Which of these is NOT a valid way of associating models?

When you've got a form, and when the user submits invalid data, you redirect back to the edit form. If you want to show a general error message (not tied to validation errors) to the user, you'd do which of the following?

What is the output of the following? $x = 10 puts defined? $X

Which of these code blocks cannot be right?

The belongs_to association supports following options? A) :autosavename, :class_id B) :primary_key, :validate, :optional C) :conuter_cache, :inverse_of, :foreign_key D) :dependent, :polymorphic, :touch

The has_one association supports following options?

Which of these options for 'dependent' do not exist in Rails?

How is it possible to create combined unique index for two fields?

How do you permit nester attributes in Rails controllers for such model? class User has_one :profile accepts_nested_attributes_for :profile end