How we can execute some code when app is in background?
What is the difference between synchronous & asynchronous task ?
What is polymorphism in ios?
What is iphone os?
What is the 'implementation'?
What is difference between nsnotification and delegate?
What is the use of appdelegate in ios?
What is dependency management tools?
How to send crash report from device?
Are document objects required for an application? What does they offer?
What persistent storage core data uses to save data?
In nsfetchrequest can we fetch only a selective few attributes of an entity? How?
What is variable in ios?