Discussion
The deleted file in Microsoft Disk Operating System (MS-DOS) can be recovered immediately, if you use the command mention below, the command is
Answer: C
The command is UNDELETE.
MS-DOS 5.0 and later include UNDELETE, which recovers a deleted file as long as its disk space has not yet been reused. That is why it should be used immediately after the deletion.
DO NOT DELETE, NO DELETE and ONDELETE are not MS-DOS commands.
UNDELETE works because deleting a file in DOS only marks its directory entry and frees its clusters; the data stays on the disk until new files overwrite it, which is why the recovery should be attempted at once.
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