What types of files can be identified based on

How can the file type be identified?

The type of file can be identified based on the file extension, which is the part after the file name "."

If not, you can make the following settings (taking Windows XP system as an example): Select [Tools]-->[Folder Options] in the menu bar in any folder, and then click [View] In the "Advanced Settings" tab, uncheck "Hide extensions for known file types" to display the extensions of all files.

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