What is arc ? How it works?
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What’s the difference between not-running, inactive, active, background and suspended execution states?
What is ios realm?
What is automatic reference counting (arc)?
How to download something from the internet?
Enlist frameworks for cocoa touch?
What is dispatch queue in ios?
Whats the difference between frame and bounds?
What is category and class extension?
What is 1x 2x?
Compare and contrast the different ways of achieving concurrency in os x and ios.
Is appdelegate a singleton?
What json framework supported by ios?