Reason Behind celebrating Defence Day of Pakistan

48 years ago, the Indian Army crossed Wagah border at 4 a.m. on 6th September and unleashed an undeclared war against Pakistan. It was an all out war both in territorial expanse and the mass of resources. Everything was committed to annihilate Pakistan once and for all but Pakistan armed forces frustrated...

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What is Email? Write its Advantages and Disadvantages

Electronic Mail: With an e-mail anyone can send messages to other users of the internet and to many network connected to the internet through gateways. Most email programs also per miles users to attach data files and program files to messages. An internet electronic mail address has two parts, the...

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Mechanism of a Hard Disk

In a disk drive a floppy diskette rotates at speeds of 300-400 RPM(revolutions per minute). Typically, hard disks rotate 7200 RMP. In a disk pack, all disks rotate at the same time, although only one disk is being read or written on at any one time. In the same way,  the high-density 3 1/2 inch...

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Secondary Memory and three its three types

Secondary Memory: Secondary memory or storage can store a ruler of information permanently and lies outside the CPU. It provides computer the means of storing and processing large quantities of data for longer periods of time and that is not currently being passed. Secondary storage is also call...

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Define Star topology with diagram

Star Network:  In a star network topology each device is connected to a central unit. Any communication between one device and another goes through the central unit. The image shows a typical configuration using central server and peripherals. Each device is directly connected to the central...

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Diferentiate b/w Soft Copy and Hard Copy

HArD COpy: Paper output is known as hard copy.  Hard copy is tangible and permanent.  Hard copy produced by a printed on paper.  The principal hard copy output devices are printers plotters, and microfilm output devices.  Soft copy is best for information that needs to be...

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What is information technology? Describe any three fields of it?

                                                                                Information Technology: We...

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Types of Modem

There are three types of modems. DIRECT CONNECT:  Which are linked to the computer by cable and the Rs.232 point and plus in to a standard telephone socket. INTERNAL:  Which are built in to the computer and have backup capabilities. Sales of micro-computers which contain internal, board-mounted...

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Differentiate b/w compiler and interpreter

Compiler: It translates the whole program at once and give an errors list to be removed. Computer is not  necessary for repeated execution of a program. Compiler is a complex program. Compiler analyses each statement, it uncovers certain types of errors referred to as diagnostic...

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Define OSI model?

The OSI Model: One communication standard created by ISO is called the open system inter connections (OSI) model that simulates the communications processing using seven layers, each with its own set of protocols. The purpose of the OSI model is to enable any vendor’s computer system to share data...

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Short Note- Uses of Computer

Uses of computer: computers are tools, they help people perform many different kinds of tasks. One way to gain an appreciation for computers is to see have some people use them in their daily lives. Information management: Computers are excellent tools for managing large quantities of information....

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Short Note- Word processing

Word Processing A word processor is just a computerized type writer. You use it to enter, edit, arrange, and print next you can use one to create memos, letters , reports, brochures any printed material. All word processors are designed for producing different kinds of written documents. Some are...

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Short Note- Web Search Engine

Web Search Engine: A search engine like Alta vista or Hot Bot offers a much more complete database of what is on the web because the database of what is on the web because the database is complied automatically. A search engine uses software agents, sometimes called spiders or software robots,...

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Short Note- Modem

Modem: The simplest form s of data transmission involve the connection of terminals to a computer via a telephone line. But the problem here is that the computer generates data in the form of digital signals where as the telephone lines used for data communication in computer networks are...

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Short Note-Uses and abuses of Internet

An international computer network connecting other networks and computers from companies universities and other institution in order to quick exchange of information is called “Internet”. Internet has its own merits and demerits. The use and abuse of internet depends upon the users. Some important...

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Define the terms user interface. Distinguish between a command line interface and a graphical user interface?

User Interface:  A user interface is combination of hardware and software that you use to communicate with and control the computer. Through the user interface, you are able to make selections the computer, request information from the computer and respond to message displayed the computer. Thus,...

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What is the copyright law state its advantages?

Copyright:  Copyright law is used to cover computer software. It is illegal to make or distribute copies of computer programs without authorization. No other copies may be made without specific authorization from the copyright owner.  Advantage of Copyright Law:  Focus on creating...

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Server software-GUI-Password-TGP-URL

What is server software?  The server software is used to manage and  administrate the server side applications. The software is installed on main server system which assigned to handle multiple clients. What does GUI stands for?  GUI stands for graphical user interface. What is password?  A...

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What are the main functions of spread sheet program

The main functions of spread sheet program are to manipulate data in tabular form. It organize data clearly  into rows and columns.  To sort the data easily.  To make use of predefined, built in functions as formulas.  To format the data easily in the form of graphs and c...

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Differentiate between switch and router

Switch: The switch can not send data out out to internet, or across a WAN.  Switch can handle only similar type of network or toplogy.  Switch has simple software to handle network activities.  The switch learns the MAC address of each computer.  Switch just used in LANs.  Router: The...

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Define a bus. Describe the function of the address bus, control bus and data bus

Bus:  A bus is a communication path way connecting two or more devices. A key characteristics of a bus is that it is a shared transmission medium. Thus a bus is a wire through which electrical signals can be transmitted.  There are three types of buses called: Address bus Data bus Control...

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Explain three basic types of instruction code format used in computer

Instruction Format:  An instruction format defines the layout of bits of an instruction in terms of constituent parts. There are various instruction format's depending upon the architecture of the computer. The types of commonly used instructions are:  Three-Address Instruction.  Two-Address...

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