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Disc Operating System (DOS)

Disc Operating System (DOS)
Filename extensions help identify certain files. What filename extension identifies command files?

BAT
COM
SYS
EXE

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Disc Operating System (DOS)
Internal command in Dos are

Dir, ren, sys
Time, type, dir
Cls, rd label
Del, disk copy, label

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Disc Operating System (DOS)
Suppose you had an incurable computer virus and decided to wipe out all the data and partitions on your hard drive and reformat. What is the order in which you must delete the partitions?

Logical, Primary, Extended
Logical, Extended, Primary
Extended, Logical, Primary
Primary, Extended, Logical
None of these

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Disc Operating System (DOS)
Which command is used to copy files?

Type
Diskcopy
Copy
All of the listed here

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Disc Operating System (DOS)
Which command is used to display all the files having the (.exe) extension but different filename?

Dir *.sys
Dir filename.*
Dir *.exe
Dir filename.ext

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

None of these
12
3
8

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