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Modern scenario of information technology:

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The modern scenario of information technology: Introduction: Information technology (IT) is the technology that merges the computing network system with high-speed communication links carrying any kind of data in the form of text, sound, images. and videos etc. Information can be defined as the facts and figures about anything that can transfer data of any kind. i.e. The know-how about any object of the universe that exists and plays its role in any network computer system. The system is any identified and known work that accepts data/information into itself, manipulates in the shape of certain output(s), and delivery so that it becomes useful and meaningful. Modern Scenario The modern impact of computer system Information Technology has broadened the base of comput ing and communication through satellite, fiber-optic, mobile phones. Thus enhancing the implications of this shift from single isolated technologies to a unified digital convergence and enabling the computer users to experi...
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Types of Data Access Methods

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Types of  Data Access Methods  ACCESS Methods The information of records is stored in a file. Logical structuring of these records is necessary so that records can be retrieved easily and quickly. The arrangement of these records on secondary storage and the ways of accessing these records are referred to as file organization.  The stored information into files can be accessed by using different ways. But the fundamental method that is commonly used to access information from files are as follows: sequential Access Method Direct Access method  Indexed Access Method  Sequential Access Method The sequential access method is the oldest and simplest access method. In sequential files, records (or information ) are stored in physical order. These records are accessed in the order in a system, one after the other. In other words, read and write operations in a computer network system on sequential files are done in sequential order. Records are reads one by one starti...
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Techniques for Device Management in an Operating System

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Techniques for Device Management in an Operating System  INTRODUCTION: One of the main functions of operating systems is to manage and control all input/output operations and the input/output (I/O) devices attached to the computer system. Therefore, there exists an (I, O) system, which is actually a subsystem and an integral part of all the operating systems. It controls and manages the function of  I/O devices. It also provides a uniform interface between application or user and me/O devices to perform different I/O operating such as: Write and read data to and from the secondary storage. Send output to output devices such as to monitor, printer or potter, etc. Get input from input devices such as keyboard and scanner etc. Different users view I/O devices from a different point of view.  For example: hardware engineer views the I/O devices in terms of different components such as chips, I/O ports, power cables, etc. That makes up the I/O device. Similarly, software engin...
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