Maximum length of DOS command using any optional parameter is A. 26 characters B. 87 characters C. 127 characters D. None of above

26 characters
87 characters
127 characters
None of above

The correct answer is: C. 127 characters

A DOS command is a line of text that tells the operating system what to do. The maximum length of a DOS command is 127 characters, including the space between the command and any parameters.

Option A is incorrect because the maximum length of a DOS command is 127 characters, not 26 characters.

Option B is incorrect because the maximum length of a DOS command is 127 characters, not 87 characters.

Option D is incorrect because the maximum length of a DOS command is 127 characters, not none of the above.