Chapter 9

1. What is the root cause of memory problems?
   1. The variables in your program are global.
   2. Inefficient code.
   3. JavaScript's performance limitations.
   4. Hardware inadequacies.

2. When using DOM elements, you should store references to them locally versus always accessing the DOM.
   1. True
   2. False
   3. True when using them more than once
3. JavaScript is pre-processed on the server side, and thus more efficient than Python.
   1. True
   2. False
4. Setting breakpoints can't find memory leaks.
   1. True
   2. False
5. It's a good idea to store all variables in the global namespace as they're more efficient to reference.
   1. True
   2. False