Explain layer objects?
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What are the Steps for using coredata?
What json framework is supported by ios (iphone os)?
What is difference between weak and strong in ios?
What is the purpose of reuseidentifier? What is the benefit of setting it to a non-nil value?
Is ios 9 still supported by apple?
How are non-atomic and atomic properties different? Which one is the default property for synthesized properties? When would a user operate one over the other?
How to handle concurrency problems in core data?
Is the object retained if I call performSelector:withObject:afterDelay:?
What is singleton class in ios?
What are the location services?
What is background state in ios?
What is id in ios?