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Disc Operating System (DOS)

Disc Operating System (DOS)
While using the DIR command, you can use certain switches with it. Which one of the following cannot be used with DIR?

/S
/W
/P
None of these
/T

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Disc Operating System (DOS)
Which command is used to delete all the files in the root directory of drive a

Erase *.*
Del *.* a:
A:\del
Del a:\

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Disc Operating System (DOS)
External command in DOS are

Sys, ver, vol
Chkdsk, prompt, date
Edit, sys, chkdsk
Copy, edit, sys, format

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Disc Operating System (DOS)
The following command set is correct according to their function

CD and RD
RD can MD
COPY and RENAME
DEL and ERASE

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Disc Operating System (DOS)
Which command lists the contents of current directory of a disk

Copy
Cd
Tree
Dir

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Disc Operating System (DOS)
Which command will prevent subsequent changes to the file CBT.EXE?

ATTRIB + r CBT.EXE
COPY + r CBT.EXE
RENAME + r CBT.EXE
MODE + r CBT.EXE

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