FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Windows file names have two parts; the file’s name, then a period followed by the extension (suffix). The extension is a three-or four-letter abbreviation that signifies the file type. For example, in letter. docx the filename is letter and the extension is docx.

Detailed explanation-2: -File extensions usually are expressed with three characters that follow the last period in the file name. Although you can change the file extension by renaming the file, the change does not alter the file type. For example, a Microsoft Word document ends with the extension .

Detailed explanation-3: -This is because many programs and file formats limit the extension to three characters. Moreover, not all operating systems supported extensions that were longer than three letters. MS-DOS, Windows 3. X, Windows 95, 98, and NT, did not support extensions longer than three characters.

Detailed explanation-4: -A filename extension, file name extension or file extension is a suffix to the name of a computer file (e.g., . txt, . docx, . md ).

Detailed explanation-5: -The three letter extension is one way Windows at times (but not always) keeps track of what a file is supposed to be. For example, files containing ordinary text usually have a three letter extension of . txt and Microsoft PowerPoint presentations usually have a three letter extension of . ppt.