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Characteristics of Operating System

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  • Memory Management -- keeps tracks of primary memory i.e. what part of it is in use by whom, what part is not in use etc. and allocates the memory when a process or program requests it.
  • Processor Management -- allocates the processor(CPU) to a process and deallocates processor when it is no longer required.
  • Device Management -- keeps track of all devices. This is also called I/O controller that decides which process gets the device, when, and for how much time.
  • File Management -- allocates and de-allocates the resources and decides who gets the resources.
  • Security -- prevents unauthorized access to programs and data by means of passwords and similar other techniques.
  • Job accounting -- keeps track of time and resources used by various jobs and/or users.
  • Control over system performance -- records delays between request for a service and from the system.
  • Interaction with the operators -- The interaction may take place via the console of the computer in the form of instructions. Operating System acknowledges the same, does the corresponding action and informs the operation by a display screen.
  • Error-detecting aids -- Production of dumps, traces, error messages and other debugging and error-detecting methods.
  • Coordination between other software and users -- Coordination and assignment of compilers, interpreters, assemblers and other software to the various users of the computer systems.



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