Determine the value of the variable x after the execution of the following code. x = [1,2,3] x.pop until x.empty? x.push(4) while x.empty?

If you want to append an item to an array, what is the standard method?

which one is class method?

Which is NOT a model validation method?

What part of a migration runs during a rollback?

Which of the following is a working ruby while-loop?

When rendering a partial in a view, how would you pass local variables for rendering?

What does the expression x ||= y mean?

Which gems is used for authentication in Ruby on Rails? (check any that apply)

What is the CGI Library? (check any that apply)

The send_data method has the following options? send_data(data, options = {})