 
             
            Disk Operating System (DOS) - Engineering
| Q1: Which is LEAST likely to interfere with upgrading to a newer DOS version?A 
ROM BIOS
  B 
Video controller
  C Compressed drives
  D 
Existing backup files
  E 
None of the above
  ANS:B - Video controller No answer description is available. | 
 
             
                            
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