jschall

What is scope? Your explanation should include the idea of global vs. local scope.
Local scope is inside a function, global would be outside of it where variable will be used throughout the code.

Why are global variables avoided?
Global variables should be avoided as the can interfere with other variable that is used in the local scope, it might as well iterfere with other varables in local scope throught all js file defined.

Explain JavaScript's strict mode
It doesnt allow any global variables to be created.

What are side effects, and what is a pure function?
side effects is when other funcutions are accidentaly interfered with, function that doesnt have a possibility of a side effect.

Explain variable hoisting in JavaScript.
It the way that interpreted read code, it starts by looking through the variables and by allowing you to call it before declaring it.