Behavioral Disk Operating System (DOS) Interview Questions & Answers:

1. The maximum length in dos command is?

127 chars

2. While working with MS-DOS, which command is used to more file from one directory to another?

a. Rename
b. Copy
c. Move
d. Cp

c. Move

3. Which command is used to set a name to a disk in DOS?

a. VOLUME
b. VOL
c. LABEL
d. DISKLABEL

c. LABEL

4. Which of the following command display the name of files in sorted order?

a. Dir/o:n
b. Dir/so
c. Dir/an
d. Dir/ah

a. Dir/o:n

5. MSD.exe does not have information on:

a. Cache
b. Video
c. Operating System
d. Com or port

a. Cache

6. Which command displays the list of all previous commands entered by the used?

a. COMMANDS/ALL
b. KEYDOS
c. DOSKEY
d. DIR/ALL

c. DOSKEY

7. Where do you find user.dat?

a. C:windows
b. C:windowssystem32
c. C:windowssystem
d. C:

a. C:windows

8. What is the name of the latest server operating system developed by Microsoft?

a. Windows NT
b. Windows 2000
c. Windows XP
d. Windows 2003

d. Windows 2003

9. Which of the following operating does not implement multitasking truly?

a. Windows 98
b. Windows NT
c. Windows XP
d. MS DOS

d. MS DOS

10. Swapping:

a. Works best with many small partitions
b. Allows many programs to use memory simultaneously
c. Allows each program in turn to use the memory
d. Does not work with overlaying

c. Allows each program in turn to use the memory

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11. The operating system creates ..... from the physical computer.

a. Virtual space
b. Virtual computers
c. Virtual device
d. None

b. Virtual computers

12. ..... share characteristics with both hardware and software.

a. Operating system
b. Software
c. Data
d. None

a. Operating system

13. ..... interface consists of things like program counter, registers, interrupts and terminals

a. Hardware
b. Software
c. Data
d. None

a. Hardware

14. .....is the first program run on a computer when the computer boots up.

a. System software
b. Operating system
c. System operations
d. None

b. Operating system

15. Multiprogramming system:

a. Are easier to develop than single programming system
b. Execute each job faster
c. Execute more jobs in the same time period
d. Are used only one large mainframe computers

c. Execute more jobs in the same time period

16. ..... transforms one interface into another interface.

a. Program
b. Software
c. Data
d. None

b. Software

17. The primary purpose of an operating system is ..... .

a. To make the most efficient use of the computer hardware
b. To allow people to use the computer
c. To keep systems programmers employed
d. To make computers easier to use

a. To make the most efficient use of the computer hardware

18. ..... is the layer of a computer system between the hardware and the user program.

a. Operating environment
b. Operating system
c. System environment
d. None

b. Operating system

19. ..... runs on computer hardware and serve as platform for other software to run on:

a. Operating system
b. Application software
c. System software
d. All

a. Operating system

20. Which type of command in DOS needs additional files for their execution?

a. Internal commands
b. External commands
c. Batch commands
d. Redirectors

b. External commands

21. While working with MS-DOS which command is used to copy all files with extension .txt into one file named all.txt?

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

d. Copy *.txt all.txt

22. While working with MS-DOS, which command is used to rename a file named file1.doc to file2.doc from a different directory called dir1?

a. Ren2.doc dirfile1.doc
b. Ren file1.doc file2.doc
c. Ren .docdir.doc
d. Ren dir1file1.doc file2.doc

d. Ren dir1file1.doc file2.doc

23. While working with which command is used to copy all files from the currently logged drive and directory with the extension .txt to the drive a:

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

b. Copy *.txt a:

24. While working with MS-DOS which command is used to combine file1 plus file2 into new file named file3?

a. Copy file3 file1+file2
b. Copy file1+file2 file3
c. Copy file1+file2+file3
d. Copy file2 file1+file3

b. Copy file1+file2 file3

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25. While working with MS-DOS which command is used to change the extension of all filenames ending with .txt to .doc?

a. Ren *.doc *.txt
b. Ren *.txt *.doc
c. Ren file.doc file.txt
d. Ren a: *.doc *.txt

b. Ren *.txt *.doc

26. Which of the following file names are invalid in MSDOS?

a. MYFILE.DOS
b. CHECK$.(1)
c. Verified.###
d. Qwerty.1?3

d. Qwerty.1?3

27. Which is valid extension that user creates on operating system?

a. Exe
b. Com
c. Sys
d. Bat

d. Bat

28. Which command is used to undelete delete a bunch of files with extension doc that you have just deleted?

a. Undelete
b. Undelete *.doc
c. Undelete/all
d. All of the above

b. Undelete *.doc

29. Which was the last version of MSDOS that was released separately?

a. 5.0
b. 6.0
c. 6.11
d. 6.22

d. 6.22

30. Which of the following statements in regard to directories is false?

a. Directories can exist inside directories
b. The root directory is always at the highest level
c. Directories with files can be deleted
d. Directories cannot be renamed

d. Directories cannot be renamed

31. Which switch should be used in the DIR command to view files in all directories?

a. /p
b. /w
c. /s
d. /l

c. /s

32. Which of the following statements is true in regard to diskcopy?

a. Copy and discopy are same
b. Discopy is a built in command in dos
c. Diskcopy can be used on hard disks
d. Diskcopy can be used with a floppy and a hard disk

c. Diskcopy can be used on hard disks

33. Which file in MSDOS contain internal command that are loaded during booting process?

a. Io.sys
b. Msdos.sys
c. Command.com
d. Config.sys

c. Command.com

34. Which command is used to delete all the files extension .txt on the current drive and directory?

a. Del .txt
b. Erase .txt
c. Del *.txt
d. Del *.*/p

c. Del *.txt

35. Which command in DOS can be used to recover accidentally deleted files?

a. UNDELETE
b. DELETE/CANCEL
c. RESTORE
d. RECOVER

a. UNDELETE