Input devices are used to interact with a computer system or used enter data and instructions to the computer. For example, as you can see in the top half of the image, a keyboard sends. It allows the user to point to displayed objects or draw on the screen in a similar way to a touchscreen but with greater positional accuracy. Nov, 2018 why does a computer need an input device. An input device is any hardware component that allows a user to enter data and instructions into a computer. Direct input devices do not require much human interaction to get their data into a computer system. For example, if a computer had no input devices, it could run by itself but there would be no way to change its settings, fix errors, or other various user interactions. Input devices as well as output devices are a neccessity in order to ensure that data is entered into a computer to be processed and the results output.
However, nearly all examples of humancomputer interaction require. Chapter 4 input and output oakton community college. Still and video scanners graphics tablets bar code reader radio frequency idrfid touch screen. This tutorial explains computer peripheral devices and their function in details with examples. Examples of input devices a keyboard is the most fundamental input device for. Five widely used input devices are the keyboard, mouse, microphone,scanner, and web cam. Its a hand held device that you can move with your hand and do clicks right or left on your screen to send commands to your computer screen area.
Source dataentry devices is devices that create machinereadable data and feed it directly into the computer without keyboard or mouse. What an input device sends inputs to a computer depends on the device. In computing, an input device is a piece of computer hardware equipment used to provide data and control signals to an information processing system such as a computer or information appliance. The functions of computer system and their application are endless nowadays because of the speedy development of computer. Types of computers and their personal computer also known. Data is input into the computer directly by a machine or device. So dear reader i have provided top expected gk questions from input and output device of computer. An input device is any hardware component that allows you to enter data and instructions into a computer. Examples of input devices include keyboards, mouse, scanners, digital. Mcq input and output device of computer with answers pdf.
The computer transmits data to the drive, where it is saved and can be later accessed. In my last post i have shared about the following job recruitment questions on basic computer technology and internetjob recruitment questions on basic computer technology and internet part1. Without io devices, a user cannot communicate with the computer. Input devices input is any data or instructions entered into the memory of a computer. Learn how computer peripheral devices such as ram, rom, processor, input and out device, motherboard and storage device work with functions and specifications. Keyboard is the most common and very popular input device which helps to input data to the computer. Since the whole device is not moved, a track ball requires less space than a mouse. In the computer industry, the terms computer and cpu are often. Introduction computer being a versatile machine can process different types of data. Track ball is an input device that is mostly used in notebook or laptop computer, instead of a mouse. Computer input once consisted of such actions as setting switches and knobs and plug ging and.
Computer hardware equipment used to communicate the results of data processing carried. Input devices as well as output devices are a neccessity in order to. These devices are primarily used for computer gaming. Explain different types of output devices perfect computer. About input and output devices some examples of input and output devices lesson 2 input and output devices input devices allow us to send information to the computer. List several different pointing devices and describe their functions. Define the following terms indicating their functions. Inputoutput devices constitute a major part of a computer system. Input and output devices input devices allow us to send information to the computer. This is to help you have a basic idea about input and output devices.
Furthermore, the easiest example is the keyboard and mouse of a computer. An input device is used to enter the data and instructions. At the most basic level, a computer is a device consisting of three pieces. Input output devices dont only produce output, but can also be used as storage and input devices. Additionally, all input devices send data from the device over a cable or wireless transmission to the computer. A computer or laptop keyboard is kind of hardware device that you can use to type data in a computer system. The layout of the keyboard is like that of traditional typewriter, although there are some. Sort which are the input and output devices of the computer and write their names 6. For example, the image shows an inkjet printer, an output device that can make a hard copy of anything shown on the monitor. Examples of input devices include keyboards, mice, scanners, digital cameras and joysticks.
List of input devices, output devices and both input. Inputoutput devices dont only produce output, but can also be used as storage and input devices. An input device is a piece of computer hardware equipment used to provide data. The layout of the keyboard is like that of traditional typewriter, although there are some additional keys provided for performing additional functions. Input devices any peripheral piece of computer hardware equipment used to provide data and control signals to the computer. You can use input devices to enter information and issue commands. Output device can produce the final product of machine processing into a form usable by humans. Chapter one introduction to computer computer a computer is an electronic device, operating under the control of instructions stored in its own memory that can accept data input, process the data according to specified rules, produce information output, and store the. Keyboards allow a computer user to input letters, numbers, and other symbols into a computer uses an arrangement of buttons or keys. Describe the purposes of scanners and readers and list some types of scanners and readers in use today. Computer monitor or screen is a device used to display information to a. The best and most expensive of these is the fullstroke keyboard.
Nov 27, 2018 input output device based mcq mcqs on input and output devices gk objective question answer exam question answer for competitive exam of govt jobs. Pdf input output storages devices in computers researchgate. Lesson 1 of this module describes the functional parts of peripheral devices and defines some of the terms associated with them. Can you give an example of input and output for a computer. These are 1 it accepts data or instruction by way of input, 2 it stores data, 3 it. In this unit we shall discuss something about inputoutput devices and their functions. Different companies have branded their products using. However, some devices can accept input and display output, and they are referred to as io devices input output devices. What are the four basic functions of computer system.
Following are few of the important input devices which are used in a computer. A motherboard or also know as system board, is the main circuit board of the system. Inputoutput devices are required for users to communicate with the computer. Identifying specialized input devices game controllers digital cameras. Chapter one introduction to computer computer a computer is an electronic device, operating under the control of instructions stored in its own memory that can accept data input, process the data according to specified rules, produce information output, and store the information for future use1. Input output devices list with their functions pcguide4u. The processor which is commonly called as cpu central processing unit is getting advanced day by day as well as the input, output, and huge storage devices. The system unit system unit is case that has electronic components of the computer used to process data.
In addition, you can get the distinction between what an input device is from an output device, by asking yourself who is receiving or showing information. You have already seen these devices but did not know as output devices and its functions. A computer keyboard includes a set of alphabets az, numbers 09, symbols and function keys. We use input devices to tell the computer what to do. Input devices will feed data into a system while output devices will take processed data from systems.
Barcode scanner, magnetic stripe reader, omr reader, ocr. Now a day computer is one of the most important field for every examinations. Also, the monitor is connected through vga cable to the cpu. Explain what digital cameras are and how they are used today.
The twelve functions keys are present on the keyboard. Output devices output devices any peripheral that receives or displays output from a computer. When hardware is installed inside or outside a computer, the operating system needs a special piece of software called a driver to help it understand how to communicate with that device. Scanner is an input device used for direct data entry from the source document into the computer system. From which we input the raw data in the computer system for further processing. Here i am going to share you about list of basic input devices, output devices and both input output devices. It allows the user to point to displayed objects or draw on the screen in a similar way to a. Output devices plotter the plotter is a computer printer for printing vector graphics plotters are used in applications such as computeraided design such as diagrams, layouts, specification sheets and banners the plotter is capable of producing color drawings in a matter of minutes plotters differ from printers in that they. These kinds of devices enable us to provide information to it and receive information from it. This is a ball which is half inserted and by moving fingers on ball, pointer can be moved. What are 10 input devices and their functions answers. The stick is connected to the base, so the stick can move freely up to the 180 degree that is used to move an object on the screen by moving it.
The devices which are used to input the data and the programs in the computer are known as input devices. The overall development of computer system has reached to a. Without any input devices, a computer would only be a display device and not. It shows the display of the input you give using a keyboard or mouse. In computing, an input device is a peripheral piece of computer hardware equipment used to provide data and control signals to an information processing system such as a computer or other information appliance. Here is the amazing 20 examples output devices and their functions. The importance of ergonomic input devices in the workplace. The input unit is formed by the input devices attached to the computer. Input device defined as the inputting tools of the computer. A computer monitor is a visual screen display unit and it is the most common example of an output device. Input devices an input device lets you communicate with a computer.
Today, input devices are important because they are what allows you to interact with and add new information to a computer. Pdf computer input and output devices ingamule siraji. These input output devices are also known as peripherals since they surround the cpu and memory of a computer system. The importance of ergonomic input devices in the workplace page 1 according to a microsoft study, computer users strike the keyboard space bar an average of 669 times per hour. Computer component and their functions identifying specialized inputoutput devices. The devices that are used to display the information of the results are known as output devices. After completing this chapter you should understand. For performing these functions, computer systems consist of input devices, a central processing unit cpu and output devices. Lesson 2 concentrates on the devices commonly used to perform input and out put functions between the computer mainframe and other machines. Computer inputoutput ports and interfaces 1 terms and abbreviations. Amazing 20 examples output devices and their functions. A track ball comes in various shapes like a ball, a button and a square.
Peripheral device, also known as peripheral, computer peripheral,inputoutput device, or inputoutput device, any of various devices including sensors used to enter information and instructions into a computer for storage or processing and to deliver the processed data to a human operator or, in some cases, a machine controlled by the computer. Computer peripheral devices and their functions explained. Devices input and output unit 4 input output devices. Today we are going to discuss these devices in detail. Input devices pointing devices light pen a light pen is a computer input device in the form of a lightsensitive wand used in conjunction with a computers crt display. An output device is any peripheral that receives data from a computer, usually for display, projection, or physical reproduction. Some commonly used input output devices are listed in table below. A central processing unit cpu, also referred to as a central processor unit, is the hardware within a computer that carries out the instructions of a computer program by performing the basic arithmetical, logical, and input output operations of the system. While the devices whose main function is to give instructions and data to the computer are called input devices. Central processing unit, input devices, output devices, main memory, arithmetic and logic unit alu, control unit cu, secondary or auxilliary. Nov, 2018 most devices are only input devices or output devices, as they can only accept data input from a user or output data generated by a computer. For example, as you move a computer mouse, the data sent to the computer is the xy axis movements used to display the mouse cursor on the screen.
Examples of io devices are cd drives, dvd drives, usb drives, hard disk drives hdds, and floppy disk drives. The functions of input and output device are mainly to help in communication. A computer mouse is an input and a hardware, pointing device that you can connect to your computer system. In simple terms, input devices bring information into the computer and output devices bring information out of a computer system.
Job interview questions on basic computer technology and internet part2. A survey found that pc users selfreported an average computer use rate of 5. Input device gives the computer the information that it works or acts on. The computer will be of no use unless it is able to communicate with the outside world. Monitors and printers are two of the most commonly used output devices used with a computer. Input devices keyboard one of the primary input devices used with a computer. The following is a list of the most common input devices which are nowadays found in a computer system. At a fundamental level, computers operate through these four functions. Following are few of the important input devices which are used in computer systems. Keyboard mouse joy stick light pen track ball scanner graphic tablet microphone magnetic ink card readermicr optical character readerocr bar code reader optical mark readeromr keyboard keyboard is the most common and very popular input device which helps in inputting. Which smaller unit of the cpu performs all arithmetic and logic functions in a computer.
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