What are different instruments xcode supports for app profiling?
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What is ios viewwillappear?
What is difference between performblock: and performblockandwait:?
What is nsmanagedobjectcontext? What are the different concurrency types?
What are layer objects and what do they represent in iOS operating system?
Who is the developer of ios?
Explain "private", "protected" and "public"?
Explain concept of notification center, local and remote notifications.
What is didreceivememorywarning method in you viewcontroller?
What are the ios devices?
What is array in ios?
What’s the difference between not-running, inactive, active, background and suspended execution states?
What is a weak var?