Explain the difference between nsarray and nsmutablearray?
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What is the difference strong and weak reference?
Explain how the push notification works in iOS operating system?
are you using charlesproxy ? Why/why not ?
Explain what is a class?
Outline the class hierarchy for a UIButton until NSObject.
Enlist frameworks for cocoa touch?
What is appdelegate in xcode?
What are ios functions?
How can we use NSOperation queue? what is the advantage of using it ?
“BgTask “ ? how long execute?
Explain Appstore uploading process
What is oops in ios?