Explain the typical functions of operating systems, Computer Engineering

List the typical functions of operating systems.

Classical functions of operating system are given as:

(1) Process management: A process is a program throughout execution. This is the job that is currently being executed through the processor. In its execution a process would need certain system resources as processor, time, main memory and files etc. Operating system supports many processes concurrently. The process management module of the operating system takes care of the creation and termination of the processes, allocating resources to the processes, scheduling processor time to various processes and communication among processes.

(2) Memory management module: This takes care of the allocation and de-allocation of the main memory to the different processes. It also allocates main and secondary memory to the system or user program and data. To execute a program, binary image of it, should be loaded into the main memory.

Operating System decides:

(a) A part of memory are being currently utilized and by whom.

(b) Which one process to must be allocated memory.

(c) Allocation and de-allocation of memory space.

(3) Input/outputs management: such type module of the operating system co-ordinates and assigns various I/O devices namely printers, terminals, disk drives and tape drives etc. This controls all I/O devices, continues track of I/O request, issues command to such devices.

I/O subsystem consists of:

(i) Memory management component which includes buffering, caching and spooling.

(ii) Device driver interface

(iii) Device drivers exact to hardware devices.

(4) File management: Data is stored in a computer system as files. Such module of the operating system would handle files held on various storage devices and transfer of files from one device to the other. This module takes care of creation, organization, naming, storage, sharing, back-up and protection of various files.

(5) Scheduling: The operating system also establishes and enforces process priority. It is determines and preserves the order wherein the jobs are to be executed through the computer system. It is so because the most significant job must be executed initially followed through less important jobs.

(6) Security management: This module of the OS ensures data security and integrity. It protects data and program from destruction and unauthorized access. This keeps different programs and data which are executing concurrently into the memory in such a way which they do not interfere along with each other.

(7) Processor management: Operating system assigns processor to the different task that should be performed through the computer system. If the computer has more than one processor idle, one of the processes waiting to be executed is allocated to the idle processor.

OS keeps internal time clock and log of system usage for all the users. This also creates error message and their debugging and error detecting codes for correcting programs.

Posted Date: 5/8/2013 7:10:44 AM | Location : United States







Related Discussions:- Explain the typical functions of operating systems, Assignment Help, Ask Question on Explain the typical functions of operating systems, Get Answer, Expert's Help, Explain the typical functions of operating systems Discussions

Write discussion on Explain the typical functions of operating systems
Your posts are moderated
Related Questions
Hierarchy Hierarchy is a process of ranking or ordering of abstraction. Hierarchy is decided by the help of 'divide and conquer' principle. Complex objects can be described

Q. Salient features of direct addressing mode? A number of salient points about this technique are: This scheme offers a limited address space since if address field has

Question 1 What are the drivers behind the convergence between voice and data networks? Explain them briefly Question 2 Explain the need and functioning of Private ST Netw

A generic algorithm is mostly analysed on basis of subsequent parameters: the space complexity (amount of space required) and the time complexity (execution time). Generally we giv

Define the Emphasis on Object Structure Emphasis on Object Structure, not on Operation Implementation In object orientation the importance is on specifying the qualities

Q. Define Stack segment ? 8086 Microprocessor supports Word stack. Stack segment parameters tell the assembler to alert linker that this segment statement states the program s

What is hysteresis? Hysteresis is well known in ferromagnetic materials. When an external magnetic field is applied to a Ferro magnet, the atomic dipoles align themselves with

How the Kernel handles both the page stealer and the fault handler? The page stealer and the fault handler thrash because of the shortage of the memory. If the sum of the worki

State the advantages of CMOS. Ans. Subsequent are the advantages of CMOS: Both n-channel and p-channel devices are fabricated on similar substrate. Low power di

Explain various classes of datatypes of C   Following are the main classes of data types in C language: 1.  Primary data types: Also called as fundamental/basic data types