IT knowledge

  What is e-commerce?Discuss its role in our daily life. E commerce E-Commerce stands for Electronic Commerce. E-Commerce means buying selling and exchanging of products services and information via computer networks.A person can deal with customers throughout the world people can buy  and sale good on internet.Even payments can be made using credit cards E-Commerce is rapidly becoming popular. Role of E-commerce The role of e-commerce in daily life is becoming very important E-Commerce can be used in the following ways: 1. Electronic Banking Many banks are now introducing electronic banking.Usng your computer, you can connect to the Bank's computer system via the internet and control your daily financial dealing from home.It reduced the staff and building of banks.Many customers pay their bills from their bank accounts using this facility. 2. Electronic Shopping It has become very easy for the people to shop from their home using internet. Different manufacturers present their

  What is network topology? Write the names of topologies. Network Topologies All network can be configured or arranged in different ways. The physical layout for arrangement of connected devices in a network is called network topology. It is the shape of a network. Different network topologies are as follows: • Bus topology • Ring topology  • Star topology • Tree topology  • Mash topology Q:What is bus topology?explain its working with diagram. discuss its advantages and disadvantages. Bus topology  Bus topology is the simplest type of network it supports a small number of computers. In bus topology all computers are network nodes are connected to a common communication medium. This medium is often a a Central wire known as bus. The Terminators are used at the end of a bus to absorb signals.Bus topology is mostly used in peer-to-peer computers. 10 to 15 computers are connected with each other in bus topology. Working of bus Network The sending computer sends the data and des

  Difference b/w Impact and non-impact Printer

  What is printer? Discuss different types of printers?  A printer is an output device that prints characters symbols and Graphics on paper.The printed output is called hard copy.Print resolution is commonly measured in dots per  inch DPI The printers with higher DPI produce higher quality output. Types of printers  DIfferent types of printers are as follows: 1.Impact printers  An impact printer was like a typewriter it prints characters or images by striking a print hammer or set of pins against an ink ribbon.impact printers are the oldest print Technologies which are still produced the impact printers are used where low cost printing is required the most common forms of print. impact printer that are as follows: • Dot Matrix printer • Daisy wheel printer • line printer 2.Non-Impact Printers A non-impact printer prints characters and graphics on paper without striking paper.Some printers use spray ink while others use heat and pressure to create images.These Printers are faster

  What is software describe different categories or types of software ? Answer: A set of instructions given to computer to solve a problem is called software. A computer work according to the instructions written in software. Software is also called program .Different softwares are used to solve different problems a computer works according to the instructions return in software.   Types of software: There are two types of softwar; 1.System software 2.Application software 1. System software is set of programs to control and manage the operations of a computer hardware. It controls the usage and allocation of different hardware components it enables application program to execute properly it controls the basic operations as follows: ▪️Saving data on disk Windows XP,7,8,vista etc. ▪️ Making computer to work for us Increase the efficiency of system e.g Antivirus,install/uninstall a program. ▪️Printing a document etc. Instruction,operate the drivers inform of CD. Examples of system softwa

      Data Data consists of unprocessed raw facts. Data is used as input in the computer. Data is not meaningful. Data is normally huge in its volume. Data is the asset of organization and is not available to people for sale. Data is difficult or even impossible to reproduce.Suppose Government loses data of census.It is almost impossible to reproduce it. Data is used rarely. Data is an independent entity. Data is not used in decision-making.       Information Information is the processed  form of data. Information is the output of computer. Information is meaningful. Information is normally short in volume. Information is normally available to people for sale. Information is easier to reproduce if lost.For example,if the list of illiterate citizens is lost,it can be reproduced easily from stored data. Information is used frequently. Information depends on data. Information is very important for decision-making.