Explain the difference between strong and retain.
Can you explain ios design patterns?
How can an operating system improve battery life while running an app?
What is @synthesize?
What are the differences between categories and extensions?
Is ios written in c?
How much do ios developers get paid?
Difference between nil and Nil.
What is categories in iOS?
What is nsobject in ios?
You wish to define your custom view. Which class will be subclassed?
Explain formal protocols?
Give example scenarios when an application goes into inactive state?