What are all the difference between iOS3, iOS4 and iOS5?
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What major changes released in ios7, ios8, ios9+?
How is it possible to improve battery life during execution of an application?
Do you know any other changes to ios 7 since wwdc?
What is a struct?
What’s the difference between an “app id” and a “bundle id” and what is each used for?
Is uikit thread safe?
Explain difference between nil and nil?
Difference between release and autorelease ?
What is nsfetchedresultscontroller? How do you turn on content monitoring?
What is the responder chain?
What is the difference between developer and enterprise developer accounts?
Explain keywords alloc and new?