Q11. What is atomic and nonatomic property attribute?
Both are same unless we use our setter and getter methods.
If we create our own setter and getter method, then atomic is useful in thread processing, but it is slow.
Nonatomic does not give guarantee on thread processing but it is fast.
Q12. What is the life cycle of view controller?
A. Press here....
Q13. Difference between viewDidLoad, viewWillAppear, viewDidAppear and viewLoad?
All The Best :)