Is the object retained if I call performSelector:withObject:afterDelay:?
Assume that an app is not in foreground but is still executing code. In which state will it be in?
Is appdelegate a singleton?
What are design patterns in ios?
What is polymorphism in ios?
What is appdelegate?
Which app specific objects store the app's content in iOS operating system?
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Explain ~/documents, ~/library, ~/tmp. What directory is ~ on ios?
What is difference between core data and sqlite in ios?
What is the responder chain?
Difference between nil and Nil.
When would you say that an app is not in a running state?
What is dependency management tools?