Differentiate between release and pool drain?
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What are the design patterns in ios?
What is a retain cycle?
Define 'copy' keyword?
Is the delegate for a CAAnimation retained in iOS operating system?
What is view controller xcode?
What is a weak var?
What is thread safe?
Explain about NSURL Connection Delegates
Explain UIApplication life cycle
What is arc?
When an app is said to be in active state?
What is @dynamic in objective-c ?