Disk Operating System (DOS) Questions

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21.

Which command is used to delete the directory that is empty?

A

Del *.*

B

RD

C

Erase

D

MD

Correct Answer: B

RD command or RMDIR commands can be used to remove a directory if it is empty. Del command and Erase commands are used to delete files not directories. MD creates a new directory and can't remove directory.

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22.

An entire path name, consisting of several sub-directory names can contain upto

A

13 character

B

36 character

C

63 character

D

53 character

Correct Answer: C

None.

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23.

MS-DOS developed in

A

1991

B

1984

C

1971

D

1961

Correct Answer: B

None.

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24.

Maximum length of DOS command using any optional parameter is

A

26 characters

B

87 characters

C

127 characters

D

None of above

Correct Answer: C

None.

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25.

In which version of DOS. CHKDSK command has been changed to SCANDISK?

A

5

B

6.2

C

6

D

6.2

Correct Answer: D

None.

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26.

CHKDSK command is used to

A

Analyze the hard disk error

B

Diagnose the hard disk error

C

Report the status of files on disk

D

All of the above

Correct Answer: D

None.

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27.

Which file is the batch file that is read while booting a computer?

A

Autoexec.bat

B

Auto-batch

C

Autoexecutive.bat

D

Auto.bat

Correct Answer: A

None.

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28.

Which command is used to backup in DOS 6+ Version

A

BACKUP

B

MSBACKUP

C

MSBACKEDUP

D

All of the above

Correct Answer: B

None.

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29.

Copy and Xcopy are same in the sense

A

Both are internal command of DOS

B

Both are external commands of DOS

C

Both can be used to copy file or group of files

D

Both a and b

Correct Answer: C

None.

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30.

Which command be used to clear the screen and display the operating system prompt on the first line of thedisplay?

A

Cd

B

Md

C

Rename

D

cls

Correct Answer: D

None.

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