What is the return value of function CGColorGetAlpha of class
CGColor?

What is the default value of allowsEditing property of UIImagePickerController class in iPhone OS 4.0?

Which properties of the UIImage class affects the way the image data is displayed when drawn?

When using a Cocoa framework, what will all ControlEvents method of UIControl class return in case it fails to create the object?

How much time in seconds will it take to display an animation if you have 60 images using UIImageView class for the property animationDuration?

What is the datatype of the clockwise parameter of the CGContextAddArc function of the CGContext class?

Which is the correct way to transfer data from one view controller to another?

Which is the correct way to check whether the view controller view is loaded or visible?

Which properties would be used to draw a shadow under UIView?

Which is the correct way to set UIButton's Highlight Tint color programmatically?

Which one is true regarding integrating and using custom fonts in an iOS application?