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Disc Operating System (DOS)

Disc Operating System (DOS)
Which of the following file names are invalid in MSDOS?

Verified.###
MYFILE.DOS
Qwerty.1?3
CHECK$.(1)

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Disc Operating System (DOS)
While working with MS-DOS which command is used to copy all files with extension .txt into one file named all.txt?

Copy *.txt a:
Copy a: *.txt
Copy *.txt all.txt
Copy *.txt c:

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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?

/T
None of these
/S
/P
/W

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Disc Operating System (DOS)
Disk copy command in DOS is used to

Copy contents of one floppy disk to another
Copy contents of CD-ROM to another
All of the listed here
Copy a file

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

Cd
Copy
Dir
Tree

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Disc Operating System (DOS)
In MS-DOS you can use small or capital letter of combination of both to enter a command but internally MS-DOS work with.

Both a and b
Small letter
Capital letter
None of above

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