What is xcode used for?
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What is difference between weak and strong in ios?
How core data differs from sqlite?
. Name the framework that is used to construct application’s user interface for iOS.
What is the purpose of ios?
Outline the class hierarchy for a UIButton until NSObject.
Is core data is thread safe?
What are selectors in objective-c?
How to registering your device with the program portal for iphone development?
What is iphone screen size?
What is a singleton?
what is singleton class? Why the whole application creates a single instance?
Explain about Viewcontroller lifecycle.