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DISC OPERATING SYSTEM (DOS)

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?

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

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Disc Operating System (DOS)
When executed from a bootable hard drive, which command will make a formatted floppy disk bootable?

COPY C:DOSCOMMAND.COM A:
ATTRIB C:*.SYS A:
None of these
XCOPY C:DOS*.* A:
SYS C: A:

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Disc Operating System (DOS)
Which of the following commands allows you to make a directory?

None of these
DD
DIR
MAKE
MD

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Disc Operating System (DOS)
While working with MS-DOS, which command is used to specify the colour display, 40 columns and color?

MODE COLOUR
MODE CO40
MODE CHANGE
None of these
MODE/C

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Disc Operating System (DOS)
Which DOS command allows you to compress existing disks and to create new compressed volumes?

MSAV
None of these
SCANDISK
DBLSPACE
DEFRAG

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