Computer Knowledge Expected Questions (Operating System) - Set 2

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1. If you need to duplicate the entire disk, which command will you use ?
   1. Copy
   2. Chkdsk
   3. Format
   4. Diskcopy
   5. None of these

• Which of the following extensions suggest that the file is a backup copy ?
• 1. Bas
     
  2. Com
  3. Bak
  4. Txt
  5. None of these 
• Which command lists the contents of current directory of a disk 
• 1. Copy
  2. Dir
  3. Tree
  4. Cd
  5. None of these
• Only filenames and extensions are to be displayed in wide format, which command you'll use ?
• 1. Dir/w
  2. Dir a:
  3. Dir/s
  4. Dir/b
  5. None of these
• Which command displays all the files having the same name but different extensions ?
• 1. Dirfilename.ext
  2. Dir *.sys
  3. Dir filename.*
  4. Dir*.ext
  5. None of these
• Which command displays only file and directory names without size, date and time information ?
• 1. Dir/w
  2. Dr a :
  3. Dir /b
  4. Dir / s
  5. None of these
• Which command is used to display all the files having the (.ex(e) extension but different filename ?
• 1. Dir filename.*
  2. Dir*.ext
  3. Dirfilename.ext
  4. Dir*.sys
  5. None of these
• Which command should be used to display all files within the specified subordinate directory of the subordinate directory of the subdirectory ?
• 1. Dir \ pathname
  2. Dir \ pathname \ pathname
  3. Dir / ch
  4. Dir \ pathname \ filename
  5. None of these
• Which command creates a directory or subdirectory ?
• 1. Dir
  2. Mkdir
  3. Md
  4. Both 2 and 3
  5. None of these
• Which command is used to delete the directory that is empty ?
• 1. RD
  2. Del*.*
  3. Erase
  4. MD
  5. None of these
• An entire path name, consisting of several sub-directory names can contain upto 
• 1. 13 character
  2. 36 character
  3. 63 character
  4. 53 character
  5. None of these
• Maximum length of DOS command using any optional parameter is 
• 1. 26 characters
  2. 87 characters
  3. 127 characters
  4. 156 characters
  5. None of these
• CHKDSK command is used to
• 1. Analyze the hard disk error
  2. Diagnose the hard disk error
  3. Report the status of files on disk
  4. All of the above
  5. None of these
• Which file is the batch file that is read while booting a computer ?
• 1. Auto-batch
  2. Autoexecutive.bat
  3. Autoexec.bat
  4. Auto.bat
  5. None of these
• Copy and Xcopy are same in the sense 
• 1. Both are internal command of DOS
  2. Both are external commands of DOS
  3. Both can be used to copy file or group of files
  4. Both 1 and 2
  5. None of these
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