I have no any basic idea about xCode 4.2 for iOS 5, I just want to add one external file to resources but when i drag and drop any file to resources I see the one question mark ‘?’ or ‘A’ behind the file name, Can you please tell me why this kind of things are occur ?
This is really basic question but i am confuse…
Please check this Image 🙂

That’s the version control status of your project files.