What is a background thread?
What is sandbox in iOS operating system?
Difference between coredata & sqlite?
Compare and contrast the different ways of achieving concurrency in os x and ios.
How to set your application id after becoming a member of iphone developer program?
What are the Different types of persistent stores?
Explain parent-child context setup?
What is singleton pattern in ios?
What is gcd? How is it used?
What is fast enumeration?
Differentiate between release and pool drain?
Explain the correct way to manage Outlets memory in iOS.
Explain what is the stack of autorelease pools. How autorelease pool work under the hood?
What is the difference between atomic and nonatomic properties?
What is synchronous web request and asynchronous ?