Go through the questions below. The purpose is not to test you, it's to allow you to test yourself. Your goal isn't to get the answers right, it's to assimilate the knowledge in the questions. That's why we made them, to give you another opportunity to address and think about things that we've seen can be unclear for some students.
This is self-scored, it is for you to help push yourself along and address gaps in your knowledge. It doesn't matter how many you get correct, it matters that you come to learn this information.
These are the thing we think about most in this type of programming language
What can variables point at? When you reference a variable, what does it evaluate to?
Does it have any adorning marks?
It could also be a method (hence "Undefined local variable or method" errors)