Mumbai University > Computer Engineering > Sem 5 > Operating System

Marks: 5M

Years: Dec 2014

• 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.