Computer Fundamental

Super computer is an extremely powerful computer capable of manipulating huge amounts of data in a relatively short time. It has huge storage capacity and very fast input/output capability. It has multiple processors, often functioning in parallel (simultaneously). The speed of a supercomputer is generally measured in "FLOPS" (Floating Point Operations Per Second). Supercomputer is used to design automobiles, aircrafts and spacecraft's; to forecast the weather and global climate; to design new drugs and chemical compounds; and to make calculations that help scientists understand the properties of particles that make up atoms as well as the behavior and evolution of…

  Computers have distinguishing characters which make them ideal machines. But they do not certain have characters which human possess. Some of the important characteristics of computers are: i]    Automatics:        ►  Computers are automatic machines which once started a job; carry it on until it is completed       provided they are given the required instructions by the users. ii]   Speed: ►  The computers are capable of taking logical decisions, performing arithmetic and non-arithmetic operations on alphabets and copying at an unbelievable speed. ►  The units of speed for a computer are in milliseconds (10-3) or even in nano and…

  1.  A Digital Computer uses distinct valuesto represent the data internally. All information are represented using the digits 0's and 1's. The computers that we use at our homes and offices are digital computers. Digital signal represent particular state that is: 0 (low) or 1(high), yes or No, On or OFF, TRUE OR FALSE. These systems store and process the data in digital form (strings of 0's and 1's). They are capable of processing analog signals but the analog signals have to be converted into digital signals using an ADC before feeding into the digital computers. 2.  Analog Computer…

Input Devices: These are the devices using which the user provides input instances. In a programmable computer, input devices are also used to input programs. Examples: Keyboard, mouse. Output Devices: These devices notify the user about the output of a computation. Example: screen, printer, speaker. Processing Unit: The central processing unit (CPU) is the brain of the computing device and performs the basic processing steps. A CPU typically consists of: An arithmetic and logical unit (ALU):  This provides the basic operational units of the CPU. It is made up of units (like adders, multipliers) that perform arithmetic operations on integers…

A computer can process data, pictures, sound and graphics, They can solve highly complicated problems quickly and accurately. A computer as shown in Fig. performs basically five major computer operations or functions irrespective of their size and make. These are 1] It accepts data or instructions by way of input. 2] It stores data. 3] It can process data as required by the user. 4] It gives results 5] It controls all operations inside a computer. 1. Input: This is the process of entering data and programs in to the computer system. You should know that computer is an electronic…

What is Internet? The internet is essentially a global network of computing resources. You can think about the internet as a physical collection of routers and circuits as a set of shared resources or even as an attitude about interconnecting and intercommunication. Some common definitions given in the past include: A network of networks based on the TCP/IP communications protocol. A community of people who use and develop those networks. Internet Based Services: Some of the basic services available to Internet users are: Email: A fast, easy and inexpensive way to communicate with other Internet users around the world. Telnet:…

Input/Output ports mean the interface point through which input/output devices are connected. Modern motherboards have attached I/O ports to connect keyboard, mouse, monitor and USB devices. Similarly LAN connection and audio ports are present. There are many ports used in computer system to connect printer, keyboard, mouse, hard disk etc. and they are named according to the pin number and functions. Parallel Port: The 25 pin pink color port is known as parallel port. The parallel port is also known as LPT port. This port is used to connect printer. Since data is transferred in parallel manner through this port.…