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Disc Operating System (DOS)

Disc Operating System (DOS)
3. What is the maximum length allowed for primary name of a computer file under DOS?

12
8
3
None of these

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Disc Operating System (DOS)
What type of commands are individual programs kept, as separate files on the hard disk (DOS diskette)?

External
Internal
Change
File

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Disc Operating System (DOS)
To display the list of all the file of the disk you would type

DIR
DIR AUTOEXEC.BAT
DIR FILES
COPY

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Disc Operating System (DOS)
After upgrading your computer to a new DOS version, an older application displays the error message "Incorrect DOS version". What should you do to run this application?

Restore the old DOS version
Contact the application's vendor support line
None of these
Use the SETVER command
Use the DOS+ command

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Disc Operating System (DOS)
Format command is used to

Prepare a blank disk
Create a new blank disk from a used one
None of above
Both of above

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Disc Operating System (DOS)
Which of the following filename extension suggests that the file is a backup copy of another file?

TXT
BAK *
COM
BAS

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