What is difference between "has_one" and "belong_to"?

Which is the correct way to know the Rails root directory path?

Best way to create primary key as a string field instead of integer in rails.

What is the recommended Rails way to iterate over records for display in a view?

where we use attr_accessor and attr_accessible in rails ?

Given the following code, where is the 'party!' method available? module PartyAnimal def self.party! puts 'Hard! Better! Faster! Stronger!' end end class Person include PartyAnimal end

Choose the best way to implement sessions in Rails 3: A) Using CookieStore B) By creating a session table and setting config/initializers/ session_store.rb with Rails.application.config.session_store :active_record_store C) By setting config/initializers/session_store.rb with Rails.application.config.session_store :active_record_store only

Given below are two statements regarding the Ruby programming language: Statement X: 'redo' restarts an iteration of the most internal loop, without checking loop condition. Statement Y: 'retry' restarts the invocation of an iterator call. Also, arguments to the iterator are re-evaluated. Which of the following options is correct?

Which of the following commands will clear out sample users from the development database?

Is an AJAX call synchronous or asynchronous?

Which of the following assertions are used in testing views?