Do you know what are layer objects and what do they represent?
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Is there any garbage collector concept available in iOS?
Introduction to iphone application development?
What is an ios framework?
Explain retain counts in iOS operating system?
Explain collections in iOS
Which framework delivers event to custom object when app is in foreground?
Explain keywords alloc and new?
If any app can run in the background, what about battery life?
Is uikit thread safe?
What NSAutorelease pool
What is the use of 'dynamic' keyword?
What is bundle