What is called before viewdidload?
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Explain difference between coredata & sqlite?
Define 'atomic' keyword?
what is the difference between nonatomic & atomic
what is Xcode command line tools package?
What is the concurrency how many ways you know to achieve concurrency?
What does 2x resolution mean?
What are most ios apps written in?
Explain the difference between frame and bounds?
What happens when you invoke a method on a nil pointer?
What are sensors in iphone?
What are ibeacons?
How to start a selector on a background thread.