STD 7 ALL SUBJECT VIDEO BOOK FOR SEM 1 STUDY FOR STUDENT
la Biscuri sá (Functions of an Operating System): Does the operating system perform various functions as mentioned below? Facilitate hardware access as a general service. Control resources, run them properly and monitor them.
Manipulation of a multiprocessor system Turn on and off the execution of the program * Control of memory access Serving multiple users at once. Providing security .. Providing other general services. In this section we will discuss some of the common tasks performed by the operating system: Providing Hardware Access as a Common Service: In the early days of computing technology to use a specific unit such as a printer etc. to use that unit in every computer program.
A set of instructions for was included. When using a new type of printer with a computer, it became necessary to add the necessary instructions to each program implemented on the computer. This approach became impossible in a short time as the number of such units, the number of manufacturers of units as well as the number of programs used in commuters increased exponentially.
Because of this the operating system continued to offer general services such as the use of hardware units. The programcode (instructions) for using a particular unit became part of the operating system. The operating system provides a general service facility for each program to use this unit.
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