What is a model class?
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Assume that your app is running in the foreground but is currently not receiving events. In which sate it would be in?
Explain how do I get a call when my ipad rings?
What is difference between category and extension in ios?
How can we use NSOperation queue? what is the advantage of using it ?
Explain what is struct?
what is universal Application?
Explain differentiate between release and pool drain?
What's fast enumeration?
What is race condition in ios?
Which are the ways of achieving concurrency in ios?
Why do you generally create a weak reference when using self in a block?
Explain how to hide images in ios?