What are kvo and kvc?
How to de-symbolicate crash log?
What happens when we invoke a method on a nil pointer?
What is singleton in ios swift?
What is weak in ios?
Is xcode a framework?
Difference between categories and extensions?
Explain the working of manual memory management?
What is libdispatch?
Arc is compile time or run time feature?
How do you setup/initialise a core data stack in your application? Is this activity performed on main thread? If not, why?
What is the difference between atomic and non-atomic properties? Which is the default for synthesized properties? When would you use one over the other?
What performance issues can you face when using coredata?
What is delegate pattern in iOS?
What is nsobject in ios?