What is difference between nsnotification and delegate?
Explain about the applications that can be used with iphone ?
What is iphone architecture?
How to parse xml?
what are the build phases available in Xcode?
What is a singleton?
Explain the difference between copy and retain?
How many versions of ios are there?
Explain xib?
Tell me what is iphone os?
Whats the difference between NSArray and NSMutableArray?
What is nsmanagedobjectcontext? What are the different concurrency types? Explain each type.
What is nsoperation and nsoperationqueue in ios?