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what is operating system? Explain different functions of OS.

Mumbai University > Computer Engineering > Sem 5 > Operating System

Marks: 5M

Years: Dec 2014

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  • An operating (sometimes abbreviated as "OS") system is a program that acts as an intermediate party between a user of a computer and the computer hardware.

  • An operating system is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer.

The functions of OS are:

  • Facilitate creation and modification of program and data files through an editor program

  • Provide access to compilers to translate programs from high-level languages to machine language

  • Provide a loader program to move the complied program code to the computer’s memory for execution,

  • Assure that when there are several active processes in the computer, each will get fair and non-interfering access to the central processing unit for execution (scheduling)

  • Provide routines that handle the intricate details of I/O programming

  • Take care of storage and device allocation

  • Provide for long term storage of user information in the form of files

  • Permit system resources to be shared among users when appropriate, and be protected from unauthorized or mischievous intervention as necessary.

  • Handle the booting process.

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