What are the important delegate methods of nsxml parser?
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What are the App states in iOS operating system? Explain them
What is ios closure?
What is nspersistentstore? Is it thread safe?
What is a singleton?
Can you please explain the difference between frame and bounds?
What is managed object context?
Tell about block and GCD
What is 1x 2x?
What is the difference between synchronous & asynchronous task ?
What performance issues can you face when using coredata?
Explain app id?
How can we achieve singleton pattern in iOS?