What is the value type of UTTypeConformsTo key of uniform type
identifier for iPhone OS 4.0?

Which directives are used to declare and define classes, categories, and protocols?

What is the datatype of the parameter inValidBitsPerChannel for the function CalculateLPCMFlags in CoreAudioTypes class in iPhone OS 4.0?

What is the return value of SecRandomCopyBytes function of SecRandom class in iPhone OS 4.0 if the function completes successfully?

Which reason will return a value of NO for the instance method startVideoCapture of class UIImagePickerController?

Which statement regarding Objective-C are correct?

Correct way to set the font size of UIButton title label?

What is the maximum size of an iOS application?

Correct way to get the value of the first object of a NsMutableArray stored in another NsMutableArray?

What is the use of performSelector in iOS?

What gets returned if XIB is not properly connected to a parent controller?