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111. Which of the following is an operating system?
  A.  Linux
  B.   Debugger
  C.   Mozilla
  D.  Google Chrome
     
   
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112. Linux is a type of …… software.
  A.   shareware
  B.   open source
  C.  proprietary
  D.  commercial
     
   
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113. Which one of the following file names is invalid in DOS?
  A.   RIT. bat
  B.  RLUA.btt
  C.  LISTEN.bin
  D.  TALK.bas
     
   
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114. Which one of the following DIR commands lists a group of files?
  A.  DIR TOOL?.bas
  B.   DIR RESCUE.bas
  C.  DIR INVOICE.bas
  D.  DIR PAYROLL.bas
     
   
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115. ‘DOS’ floppy disk/operating system does not have
  A.   a file allocation table
  B.  All of these
  C.   a virtual memory
  D.  a root directory
     
   
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116. Usually, in MS-DOS, the primary hard disk drives has the drive letter ......... .
  A.  C
  B.   B
  C.   D
  D.   A
     
   
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117. Which of the following is not usual file extension in DOS?
  A.  .com
  B.  .exe
  C.   .bat
  D.  .0
     
   
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118. Which one of the following DOS commands sends contents of the screen to an output device?
  A.  BREAK
  B.  DISK COPY
  C.  None of these
  D.  MORE
     
   
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119. The purpose of DISKCOPY command is to
  A.  format the disk if it is not formatted before a write operation is initiated on it
  B.  All of these
  C.  overwrite the existing contents of the destination disk as it copies the new information to it
  D.  make an exact copy of a floppy disk
     
   
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120. Which command is used to delete file from a directory in DOS?
  A.  DEL
  B.  REN
  C.  MD
  D.  CD
     
   
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