While installing Ruby, why do you sometimes get a missing "psych” error?

Which command will you use in Updates Ruby in the latest version?

Which code snippet can be used to include all javascript files?

Which code snippet can be used to include all javascript files?

What is the SQL equivalent of following code? user=User.take(3)

Why would let() be used in rspec?

Which will check the array named 'big_data' for the presence of a key 'icecream'?

If you create PostsController, where will Rails look for its templates by default?

How do you remove a column during a migration?

Which command, when run, will compile all assets in the 'app/assets' directory and copy compiled versions to a configured target directory ('public/assets' by default)?

Which is NOT a Ruby operator?