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DOS (Disk Operating System)

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“DOS related Frequently Asked Questions by expert members with experience in Disk Operating System. These questions and answers will help you strengthen your technical skills, prepare for the new job test and quickly revise the concepts”

216 DOS (Disk Operating System) Questions And Answers

181⟩ Which is the valid filename assign in MS-DOS? a. Ram*.txt b. Ram?.doc c. Ram_$.txt d. None of above

c. Ram_$.txt

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182⟩ Which command in DOS can be used to recover accidentally deleted files? a. UNDELETE b. DELETE/CANCEL c. RESTORE d. RECOVER

a. UNDELETE

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183⟩ 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

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184⟩ 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

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185⟩ 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

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186⟩ 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

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187⟩ 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

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188⟩ 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

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189⟩ 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

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190⟩ Which is valid extension that user creates on operating system? a. Exe b. Com c. Sys d. Bat

d. Bat

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191⟩ 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

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192⟩ 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

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193⟩ 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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194⟩ 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:

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195⟩ 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

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196⟩ 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

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197⟩ 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

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198⟩ ..... 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

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199⟩ ..... 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

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200⟩ 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

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