How many types of background modes supported in ios?
what is dispatchQueue?
What is thread in ios?
How are non-atomic and atomic properties different?
Can we support the same application for iphone 3gs and iphone 5, 6, 7? Why not?
What is posing in iOS?
Explain the features is ios 6?
Did you used CLRegion? How its working?
How does the runtime handle message passing? What is message forwarding?
How to download xcode for iphone development?
Explain the difference between strong and retain.
What is iphone sdk?
What is the 'interface' and 'implementation'?