What is singleton design pattern in ios?
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Which class will be subclassed in iOS operating system?
Is uikit thread safe?
What is synchronized() block in objective c? What is the use of that?
Explain about Viewcontroller lifecycle.
Why core data is faster than sqlite?
what are fetched properties?
What is a serial queue?
What is difference between performblock: and performblockandwait:?
What is gcd in ios swift?
Explain me what is "delegate"?
If you run an application on device , which has location services.Which location it will show first ?
What is an iphone app?