Enlist the methods to achieve concurrency in ios?
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Who developed ios?
What is view controller xcode?
What is the latest version of ios?
What is arc in ios?
Explain UIApplication life cycle
Explain the difference between nsarray and nsmutablearray?
Can you explain ios design patterns?
Explain app's state transitions when it gets launched?
What is the meaning of 'weak' keyword?
What is 1x 2x and 3x in ios?
Is a delegate retained?
What is cocoa and cocoa touch?