Program receives operating system services through the set of system calls. System calls provide the interface to a running program and the operating system. Directly by means of Operating System Commands. By means of Operating System Call in a program. There are two ways one can interact with operating system : Other programs rely on facilities provided by the operating system to gain access to The positioning of operating system in overall computer system is shown in the following figure.įrom the above diagram, it is clear that operating system directly controls computer hardware Many concepts and techniques found in operating system have general applicability in It helps users to understand the inner functions of a computer very closely. Task since it is his primary interface with a computer. User interacts with the computer through operating systems in order to accomplish his There are many important reasons for studying operating systems. Management of the operation and control of I/O devices. Supervision of the execution of user programs to prevent errors and improper As a control program it serves two major functions:Ī. ![]() The allocation process should be as fair and efficient as possible. To allocate the separate resources of the computer as needed to solve the problem given. Hardware in a convenient and efficient manner. To provide an environment for a computer user to execute programs on computer The main Purposes of Operating Systems are: It makes the computer system user friendly. WithoutĪn operating system, a user cannot run an application program on their computer, unless theĪpplication program is self-booting. Operating system is the most important type of system software in a computer system. It simply provides an environment within which other programs can do useful Like a government, it performs no usefulįunction by itself. It acts as an interface between users and hardware of a computer system.Īn operating system is similar to a government. Software consisting of procedures for operating a computer and providing an environment forĮxecution of programs. Operating system is system software, which may be viewed as an organized collection of The purpose of an operating system is to provide anĮnvironment in which a user can execute programs in a convenient and efficient manner.
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