LNTAB

How does computer work? Whenever switch on the computer Operating System (Kernel) gets loaded into main memory during this process Operating System checks the all hardware and software components required by the computer. If any problem is detected then it will display error messages. If everything is OK Operating System loaded into main memory that is known as booting and it is called also POST (Power on Self Test). Now, user input the data into the computer system that goes CPU via RAM and now CPU perform the task in binary bits (0 & 1) and return back to the main memory as a result.

Von Neumann Architecture A CPU consists of ALU and CU. There is a main memory system. Data & programs are store in a single place. Each memory location has unique address. There is a single path between main memory and CPU that is called bottleneck. Von Neumann Archiecture

Applications:- In sports In hospital In banking sector For entertainment For online education For e-commerce For stores bulk of data For data sharing

Demerits:- Computer cannot thing. Computer cannot learn from experience. It is totally dependent on program and its instructions. A user required to operate the system.

Merits:- It is used to fast operation. It is provided to us accurate result. Data’s results are store. Improve the productivity of organization. It is easy to learn. It is versatile; this means it is used in every field.

What is Computer? Computer is an electronic machine that is used to specialized design for accepting the data, processes it and gives result. Process Diagram The computer performs the task according to the instructions that is imposed by a program. This means that computing operations are totally dependent on program and its instructions. Computer Devices:- Computer devices are categorized into three groups:- Input Device Process Device Output Device 1. Input Device:- Input device is used to input the data into the computer. Such as, Keyboard, Mouse, Light Pen etc. 2. Process Device:- The Process device is used to perform the operation into the computer; it is called CPU (Central Processing Unit) and that is known as brain of computer. Logically, it is divided into three sectors. a) ALU b) CU c) MU a) ALU ALU is used to arithmetic & logical operation in CPU. b) CU CU is used to maintain and control the operation executing in CPU...