Q:
      
      
         
            
Operating system functions may include
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: D) All the above         
         
Explanation: An operating system has three main functions:
(1) manage the computer's resources, such as the central processing unit, memory, disk drives, and printers,
(2) establish a user interface, and
(3) execute and provide services for applications software.
       
      
      
      
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