What is nsoperation and nsoperationqueue?
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Explain the difference between coredata & sqlite?
What is dynamic in iOS operating system?
what are fetched properties?
From which ios version, arc is supported?
Explain me what is "delegate"?
What is the meaning of 'weak' keyword?
What is reference count in ios?
What is category in ios?
How can a user respond or react to the state transitions on the app?
What is gcd in ios?
Enlist frameworks for cocoa touch?
What is weak and strong in ios?