Bryan Klimt of Parse wrote up a nice and short quiz to test your knowledge of
Objective-C blocks. Given the confusion that blocks can cause for even
the smart iOS developers, it’s a good check to make sure you’re using them
correctly. Bottom line: using ARC helps make the rules more clear.
I missed one of the questions myself. But in my defense, it’s because I’ve been
using ARC exclusively and forgot the subtle rules of the “ancient ways”. :)