There are lots of archive types:
zip is most commonly used and the simplest archive format
rar is a good format used mostly on windows
There are also many other archive formats, like:
tar - it just packs lots of files into single file, referred to as tarball
tar.gz - tarball compressed using GNU zip
tar.bz2 - tarball compressed using bzip2
tar.lzma - tarball compressed using lzma
7z - archive format used by 7zip
The best choice for most stuff is 7z, or tar.bz2. rar is a bit doubtful since only packer/unpacker for windows is non-free.
There are no set file extensions for an ASCII text file, however one that is commonly used is .txt
Similar question has been answered here:What_is_the_file_extension_for_Microsoft_excel_file
Windows hides file extensions by default in File Explorer for known file types to provide a cleaner and more user-friendly interface. This setting is meant to simplify the user experience by preventing confusion caused by unfamiliar file extensions. Users can change this setting by going to the "View" tab in File Explorer, selecting "Options," and unchecking "Hide extensions for known file types." This allows users to see the full filenames, including their extensions.
File extensions can range from 1 letter to 7 letters. For example ".A" used with Unix library or ".TORRENT" which stores metadata used for BitTorrent, and even double file extensions such as ".TAR.GZ" formed when a ".TAR" is compressed with a ".gzip".
Windows hides file extensions in File Explorer by default for known file types to simplify the user experience and reduce clutter. This setting can be adjusted in the Folder Options menu, where users can choose to show file extensions for all files. The option is typically turned on for security reasons, as displaying extensions can help users identify potentially harmful files. To view file extensions, users can enable the "File name extensions" checkbox in the "View" tab of the Ribbon in File Explorer.
A compressed folder can have many extensions. The usual windows extension is .zip. But .7z (for 7zip) and .rar can also be used.
By default, Windows hides the extensions of files when viewed in Windows Explorer and on the Windows desktop. You may unhide all known file types by opening Windows Explorer, selecting Tools > Folder Options, clicking the View tab, and removing the checkmark to ñhide file extensions for known files types.î
If you don't see your extensions, this is because by default XP hides them (stupid if you ask me). In Windows Explorer (not IE) go to Tools|Folder Options... and in the "View" tab, uncheck "Hide extensions for known file types." Then you can change it just by renaming the file.
The default file extension for notepad is .txt. However, you can designate notepad as the primary application for any extension.
.txt is not a compressed file.
.txt is not a compressed file.
By default, Windows hides the extensions of files when viewed in Windows Explorer and on the Windows desktop. You may unhide all known file types by opening Windows Explorer, selecting Tools > Folder Options, clicking the View tab, and removing the checkmark to ñhide file extensions for known files types.î