what is the difference between nonatomic & atomic ? which is thread safe and why
What is arc?
What is difference between performblock: and performblockandwait:?
What are the features is ios 6?
what is the difference between Xcode, Cocoa and Objective C?
Do you know what are layer objects and what do they represent?
Explain how to silent the noisy keyboard?
Explain your process for tracing and fixing a memory leak iOs?
What is foundation framework in ios?
Does objective-c contain private methods?
When is an app said to be in active state?
How are non-atomic and atomic properties different?
How we can do multithreading in ios?
Explain how the push notification works in iOS operating system?
What are the 7 osi layers?