What is the output of the following code in Ruby?

a = "hello world"

puts a.scan(/(..)(..)/)

Environment variables in Ruby: Statement 1: Environment variable RUBYLIB defines the search path for libraries. Statement 2: Environment variable RUBYLIB_PREFIX modifies the RUBYLIB search path by replacing the prefix of a particular library.

Which of the following statements regarding Ruby variables is incorrect?

DBD::Mysql implements some driver-specific functions to be used In Ruby. Given below is one such function: dbh.func(:insert_id) => Fixnum What is the purpose of this function?

Which of the following options represent correct Ruby syntax?

Assuming that f is an instance of the File class:

Which of the following is used to cancel the method definition?

Statement X: Method names should begin with an uppercase letter. Statement Y: Methods should be defined before calling them, otherwise Ruby will raise an exception for undefined method invoking.

What is output of this Ruby code? foo = 'testing' puts defined? foo puts defined? $_

Statement 1: When a Ruby program terminates, all running threads are killed. regardless of their states. Statement 2: You can wait for a particular thread to finish by calling that thread