What is fast enumeration in iOS operating system?
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What is the difference between strong and retain.
What is the difference between stack and heap?
What is core data stack?
Why uicontrol is provided if we can create custom uiview?
How many versions of ios are there?
What is lazy loading?
What is category and class extension?
So how is the new look different from the old look?
What is the difference between viewdidload and viewdidappear?
Which are the app’s state transitions when it is launched?
What is context in core data ios?
Which json framework is supported by ios? : IOS Architect