These questions were quite challenging for me meaning I clearly didn’t review the fundamentals enough… Hopefully you all don’t make the same mistakes I did 
What is the runtime complexity of searching for an item in a binary search tree?
What is the algorithmic paradigm of merge sort?
Why would you use a decorator?
Why would you use a mixin?
What is the runtime complexity of adding an item to a stack and removing an item from a stack?
What is the purpose of self keyword when defining or calling instance methods?