What method definition do if the value of the accessed counter is 0?     - (void)discardContentIfPossible

If the code is written using the Core Foundation and Foundation macros, the simplest way to create strings files is:

What is the function of the Code Sense feature in Xcode?

Which statement is correct regarding functions fopen and open in generic C?

What happens if Xcode is not able to find a file or folder at the path defined for it in the project?

If you want to rotate an object using Core Animation, in radians, in the z axis, which of the following key paths of a layer’s CATransform3D matrix will you use?

What is the use of Alpha value that is available in attributes of every Interface Builder object?

The configuration data of table view objects in Xcode 4.x is loaded from:

Which two are true about (void)didReceiveMemoryWarning method?

You are developing an application for iOS in Xcode 4.x. Which option will check if a text field with id 'TextField' is empty or not, and displaying it in a label with the id 'Output'?

Which profile is to be created to test an iOS app on a variety of devices and iOS versions?