What is 'notification'?
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Are document objects required for an application? What does they offer?
What is the use of 'dynamic' keyword?
How to send your device id to an iphone developer?
What is difference strong and weak reference ? Explain.
What happens when you invoke a method on a nil pointer?
Does iOs supports multitasking?
What is gcd? How is it used?
What is callback in ios?
What are the application lifecycle in ios?
Difference between release and autorelease ?
What are layer objects in iOS operating system?
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What is atomic and nonatomic in iOS operating system? What is run loop in iOS ?