iOS Objective-C interview questions

I just throw some technical questions out here. Note Ray Wenderlich has a series on this. BlackPixel has an article too.

life cycle of UIViewController;

NSString property copy or retain?

frame vs bounds

category vs subclass

What is protocol (Apple doc; Ry’s Objective-C tutorial)? Create a protocol for List, and how to implement the “add” method for linked list (stackoverflow)?

block (how to avoid memory issue);

To be continued…