A light pen is a computer input device in the form of a lightsensitive wand used in conjunction with a computers crt tv set or monitor. The address decoder, the data and status registers, and the control circuitry required to coordinate io transfers constitute the devices interface circuit control circuits address decoder data and status registers bus data lines control lines input device address lines. The keyboard is a primary device for inputting text by pressing a set of keys. Touchscreens can be described as both an input and output device. An input device is any peripheral used to provide data and control signals to a computer. Mcqs on input and output devices gk objective question answer exam question answer for competitive exam of govt jobs. Conference on human factors in computing systems, tutorial 26 notes. Keyboardthe most common and very popular input device which helps in inputting data to the computer mouse mouse is the most popular pointing device and cursorcontrol device having a small palm size box with a round ball at its base which senses the movement of mouse and sends corresponding signals to cpu when the mouse buttons are pressed. External devices are not connected directly to the system bus because they have a wide range of control logics, as well as data transfer speeds and formats.
An input device is a hardware device that is used to provide input data instructions to a computer so that it can be processed. An input device is a piece of computer hardware equipment used to provide. Data is entered into the computer by pressing set of keys available with this device. Input and output devices input devices allow us to send information to the computer. Input and output devices 2 goals provide practical introduction to the hardware required for virtual environment and 3d interaction examine common and state of the art io devices advantages and disadvantages discuss how different io devices affect interface design. The keyboard is the most common and widely used input device. These scanned images are then used in computer aided design cad, or sent to a d printer to take a 3d printout. It can scan any printed document with text as well as images. The following is a list of the most common input devices which are nowadays found in a computer system. Input devices accept data and instructions from the user. Aug 27, 2018 keyboardthe most common and very popular input device which helps in inputting data to the computer mouse mouse is the most popular pointing device and cursorcontrol device having a small palm size box with a round ball at its base which senses the movement of mouse and sends corresponding signals to cpu when the mouse buttons are pressed. To enter information and issue commands, you use input devices. From which we input the raw data in the computer system for further processing.
Mcq input and output device of computer with answers pdf. A track ball comes in various shapes like a ball, a button and a square. Keyboard,mouse,joystick,scanners,digital camera, bar code reader, touch sreeen,speech input device microphone. Introduction to semiconductors, doping, generationrecombination, te carrier concentrations. 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.
Input devices data glovepolhemus a modern attempt to provide the user with more degrees of freedom common in virtual reality applications polyhemus can provide six degrees of freedom rotation and translation head mounted display although primary a display device, it can also track position and orientation like polhemus space ball six degrees of freedom sphere. Generally input devices are manual or direct data entry devices. Uses of optical scanners you can scan your documents or pictures to. Output device that produces text and graphics on paper result is hard copy, or printout. Input and output devices school of information technology. Computer cannot understanding our language because it understands only machine language and it can be possible using some devices are called input devices when we work with computer we need. Worksheet 2 input devices make sure that you are familiar with all of the information detailed in this booklet. So the keyboard is an input device and the monitor is the output device. Types of scanners input device perfect computer notes. The measure of a device is what the device returns to the user program. They are divided into two categories 1 manual input devices devices that need human involvement to input data. Keyboard is an input device for entering data and instructions into a computer.
Most common and very popular input device is keyboard. However, there are dozens of other devices that can also be used to input data into the computer. A computer is a device that accepts data input, process data, store data and output results. Virtually all external devices have buffers, control signals, status signals, and data bits. Explain how a touchscreen is an input device and an output device. Nov, 2018 an input device is any hardware device that sends data to a computer, allowing you to interact with and control it.
An output device works by receiving a signal from the computer and using that signal to perform a task to display the output. An input device is any hardware component that allows a user to enter data and instructions into a computer. There are two kinds of viewing screen used for monitors. So dear reader i have provided top expected gk questions from input and output device of computer. Input device defined as the inputting tools of the computer. Any data or instruction entered into the computer is known as input. Dec 29, 2016 keyboard is an input device for entering data and instructions into a computer. An input device is any hardware device that sends data to a computer, allowing you to interact with and control it. The keyboard helps in inputting the data to the computer. A computer is an electronic device machine that works under control of stored programs. 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.
But traditional paper notes can turn into a disorganized mess. Monitors, commonly called as visual display unit vdu, are the main output device of a computer. It is most widely used input device to enter data and instructions into the computer. The manner by which physical and logical input devices provide input to an application program can be described in terms of two entities. Status information is used inter alia to implement another level of handshaking see later. These scan through very thin slices of the object by the use of xrays, gamma rays and radio frequencies. Nov 16, 2019 an output device works by receiving a signal from the computer and using that signal to perform a task to display the output. Read any printed paper or picture, convert text or images into digital form. An input device is a device that allows the user to input data into the computer. Nov 22, 2016 input devices pointing devices keyboard optical input devices audio input device video inpu device 7. Examples of input devices include keyboards, mouse, scanners, digital cameras, joysticks, and microphones input devices can be categorized based on. This is a ball which is half inserted and by moving fingers on ball, pointer can be moved. The speed of printers can be measured in characters per second cps or pages per minute ppm, the higher the values are, the faster the printer can produce output.
The most commonly used or primary input devices on a computer are the keyboard and mouse. Saves this converted digital file into computer storage for later use. Input and output devices bangladesh open university. The most fundamental pieces of information are keystrokes on a keyboard and clicks with a mouse. Since the whole device is not moved, a track ball requires less space than a mouse.
Use the theory notes on the site to help you complete this booklet. The sharpness of the image depends upon the number of pixels. An input device allows users to communicate and feed instructions and data to computers for processing, display, storage andor transmission. Now a day computer is one of the most important field for every examinations. Pointing devices a pointing device, or sometimes called a pointing tool, is a hardware input device that allows the user to move the mouse cursor in a computer program or operating system.
Track ball is an input device that is mostly used in notebook or laptop computer, instead of a mouse. Sep 20, 2012 mouse is the most popular pointanddraw device it is a musthave input device on modern personal computers has 2 or 3 buttons and can be clicked or doubleclicked to perform tasks optical mouse doesnt have a ball but uses a laser to sense the motion types of mouse. On a computer keyboard input device, if you type h, it sends inputs a signal to the computer. The screen element on the device enables simultaneous output. The most popular keyboard used today is the 101keys qwerty keyboard but multimedia keyboard is also available which contains more than 101 keys. A user presses a key which transfers information to a computer. This is the standard input device attached to all computers. The picture shows a logitech trackball mouse, which is an example of an input device the most commonly used or primary input devices on a computer are the keyboard and mouse. Chapter 8 input devices, interaction techniques, and. Right, the commands you type are the input and what. An input device is a hardware or peripheral device used to send data to a computer.
Excess populations and minimum carrier lifetime, photoconductivity. They are divided into two categories 1 manual input devices devices that. Following are some of the important input devices which are used in a computer keyboard. It forms images from tiny dots, called pixels that are arranged in a rectangular form. Some voice input devices can recognize spoken words from a predefined vocabulary, some have to be trained for a particular speaker. Input is usually given by clicking the mouse or typing on the keyboard.
Fahad khan an input device is a piece of hardware that is used to enter data into a computer. An input device can be defined as an electromechanical devices that allows the user to feed information or data into the computer for analysis, storage and give command to the computer. An input device for a computer allows you to enter information. It allows the user to point to displayed objects, or draw on the screen, in a similar way to a touch screen but with greater positional. All the keys are neatly mounted in a keyboard connected to the computer system. The distinction between output devices and input devices. The picture shows a logitech trackball mouse, which is an example of an input device.
Input devices pointing devices keyboard optical input devices audio input device video inpu device 7. An output device is a device that takes the result of the processing from the computer and presents it as information to the user. Is used to input, store, output and retrieve information. Usually two degrees of freedom provides relative movement information mousetrackball a two degrees of freedom device controlled by a rolling ball provides relative movement information digitizertablet a two degrees of freedom device controlled by electromagnetic. Pdf computer input and output devices ingamule siraji. Such equipment involves the use of speech recognition processes, and can replace or supplement other input devices. A computer is an electronic devicemachine that works under control of stored programs. Whether youre at school or in business, taking notes at lectures and meetings is the best way to keep track of whats happening. What are different types of input devices with examples. However, there are dozens of other devices that can. The trigger of a device is a physical input on the device with which the user can. Output devices projector an output device that can take the display of a computer screen and project a large version of it onto a flat surface. Any hardware component used to enter data, programs, commands, and user responses into a computer scanners and reading devices voice input keyboard pointing device video input digital p.
It is the most common input device used for entering data and information into the computer system. A printer is an output device that produces a printout or hard copy of the output from a computer. The input device converts the data into the computers own internal code. An interaction technique is a way of using an input device to enter a particular type of value into the computer such as a pulldown. Input and output devices 3 lecture outline output devices visual displays audio output tactile and haptic output input devices discrete event devices continuous event devices combination devices speech input the first part of the lecture will describe a number of output devices that stimulate the. This will normally involve taking the data in a form that the user presents and converting it into binary code for the computer.
It has function keys f1, f2,f12 used to perform specific tasks. In computing, an hyg input device is a piece of faiza computer hardware equipment used to provide data and control signals to an information processing system such as a computer or information appliance. Devices input and output unit 4 input output devices. There are a number of tasks for you to carry out, be sure to read the information fully whilst completing the tasks.
Input devices o level computer science 2210 prepared by. Inputoutput and interfacing usually a peripheral device will require several port addresses, some for the transfer of proper data, and others for the transfer of status information about the device. It allows the user to point to displayed objects, or draw on the screen, in a similar way to a touch screen but with greater positional accuracy. Lecture notes microelectronic devices and circuits. 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. Student notes page 1 of 7 k aquilina input devices input is any data or instructions entered into the memory of a computer. When a capacitor is located across nodes where there is voltage gain, its e. An input device helps you to communicate with the computer. When you have the device type zpdf1 you can create an output device using this device type and access method ll print locally.
1097 1626 281 85 883 1495 1596 1607 12 746 1657 604 918 99 668 490 629 762 220 1336 1119 450 829 975 669 725 1275 1347 581 669 1196 1043 821 544