What is iphone os?
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Explain interfaces?
Give example scenarios when an application goes into inactive state?
. List down app's state transitions when it gets launched.
What is 1x 2x?
When is an app said to be in active state?
What is @implementation?
Is the object retained if I call performSelector:withObject:afterDelay:?
what are the controllers are available in objective C
Explain how to hide images in ios?
What is advantage of categories? What is difference between implementing a category and inheritance?
Will the new design mean I have to completely relearn how to use my phone?
Describe @objc inference?