Answer :

Final answer:

To save and exit vi, type 'ZZ' in command mode. This command saves your work and then closes vi editor. Therefore the correct option is C. ZZ.

Explanation:

To save a file and exit the vi text editor in command mode, you should type ZZ. This command ensures that the work you have done in vi is saved before the editor closes. It's important to remember that commands in vi are case sensitive; therefore, ZZ is different from zz. The latter does not exist as a command in vi.

In contrast to other editors mentioned like Emacs, where saving a buffer may involve the commands C-x C-s or M-x save-buffer, and exiting Emacs would be C-x C-c or M-x save-buffers-kill-emacs, vi simplifies the process by combining both save and exit into a single command with ZZ.

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