How we can execute some code when app is in background?
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What is mvc? Mvc architecture of iphone app.
Explain the difference between frame and bounds?
What is notification in iOS?
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What is datasource in ios?
What is the difference between inheritance and category?
What is push notification?
What is core data?
Which is the application thread from where uikit classes should be used?
What is a category and when is it used?
What is synchronous vs. Asynchronous in gcd ?
What is block in ios?
How can we use NSOperation queue? what is the advantage of using it ?