computer_knowlege4_you

The microprocessor takes the data from the real world , processes as is according to a program and sends the result to the output devices so that the result can be presented in the real world. The communication between the microprocessor and the outside world (user) is established through I/O devices only. These devices are known as peripheral devices. example. keyboard, mouse, joystick, printers etc.     Definition of peripheral devices : - The peripheral device is a computer device such as: - keyboard or scanner. These devices are not part of the computer. These are auxiliary devices of the computer. A peripheral device provides input / output (I / O) functions to a computer and does not have the capability of computing. Despite the lack of computing capability, it also acts as a computer accessory. The peripheral devices connect to the computer through several I / O interfaces, such as communications , universal serial bus (USB) and serial ports. Types of Peri

The Operating system performs large number of functions . Each function is carried out by a component of the operating system. the component of an operating system   are : 1. Process management sub-system. 2.Memory management sub-system. 3.File management sub-system . 4.I/O system management sub-system. 5.Secondary storage management sub-system. 6.Network management sub-system. 7.Protection sub-system. 8.User interface sub-system. Process Management “An operating system is a collection of programs that manage system resources such as processor memory, input / output devices (I / O devices) and file systems. . "All these systems resources are valuable, which helps the operating system to work co-operatively with each other." The operating system keeps track of the status of each resource and allocates resources for different processes based on a certain policy and also decides how long a process is resourcing. Will use Lastly, it also de-allocates the allocated

The Operating system is an interface that provides interaction to user with computer hardware like hard disk, RAM , printers , keyboard etc. it's a most important program in a computer system.                       diagrammatic representation of user interface                                             with computer hardware    this is the one program that runs all the time ,as long as computer is operational .The fundamental goal of computer system to execute user programs and to make solving user problem easier.   the primary goal of an operating system is to make computer operation easy. The secondary goal of an operating system is to make efficient operation of the computer system .  What is an Operating system ? The Operating System acts as a medium between the user and the computer. The OS (Operating system) is a system software. Which provides the interface between the user and the system. It provides all the resources of the

COMPUTER SYSTEM                                              A computer system is made of following component :         1. HARDWARE         2.OPERATING SYSTEM         3.APPLICATION PROGRAMS         4.USERS 1.HARDWARE----------                                        The CPU ,the memory and the I/O devices provides the basic computing resources for the system. 2. Application programs--------                                                                   such as word processors, spreadsheet, compiler, and web browsers are used to solve user's computing problems. 3 .Operating system------   An OS is a software on a computer that manages the way different program use it's hardware , and regulates the way that a user control a computer. The OS provides services such as user interface ,file and data base access.   Main component of computer  There are 5 major executive units of a digital computer: - 1. Central Processing Unit (CPU) 2. Visual di