Is appdelegate a singleton?
When to use nsmutablearray and when to use nsarray?
What is the difference between retain & assign in iOS operating system?
How do you create a fetched property?
What is a retain cycle?
What are the different types of ios application states?
Can my application have multiple models?
Enlist the methods to achieve concurrency in ios?
How to deal with sqlite database?
What is nsobject in ios?
Explain the correct way to manage Outlets memory in iOS.
What is abstract class in ios?
Is core data is thread safe?
Have you uploaded app on appstore? What is the process?
How would you create your own custom view in iOS operating system?