File System Questions Medium
A file system file extension is a suffix added to the end of a file name, typically separated by a period, which indicates the type or format of the file. It helps the operating system and applications identify the file and determine how to handle it. File extensions are usually three or four characters long, such as .txt for text files, .docx for Microsoft Word documents, .jpg for image files, .mp3 for audio files, and .pdf for portable document format files. The file extension provides a standardized way to categorize and organize files based on their content and allows users to easily recognize and work with different file types.