Every computer performs the basic functions of input, processing, storage, output, and transmission of data. 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. The objective of output devices is to turn computer information into a human friendlyreadable form. 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. Fahad khan an input device is a piece of hardware that is used to enter data into a computer. There are many examples of output devices, each with their own benefits and drawbacks. In simple terms, input devices bring information into the computer and output devices bring information out of a computer system. Output devices provide data in myriad different forms, some of which include audio, visual, and hard copy media. Keyboards allow a computer user to input letters, numbers, and other symbols into a computer.
Monitors graphic plotter printer monitors monitors, commonly called as visual display unit vdu, are the main output device of a computer. Aug 27, 2018 as you know computer is very important section to get a good score for bank exam. They are divided into two categories 1 manual input devices devices that. This type of keyboard is available with most mainframe computer terminals or. Dec 29, 2016 an input devices converts the data and instructions into binary form that computer can understand. Output is the result we get through output devices. Ingamule siraji 1 a computer is an electronic device that works. Microphone is an input device to input sound that is then stored in digital form. The computer organization notes pdf co pdf book starts with the topics covering basic operational concepts, register transfer language, control memory, addition and subtraction, memory hierarchy.
Input and output devices department of computer science. A printer is an output device that produces a printout or hard copy of the output from a computer. Input and output devices michtom school of computer. Any device has to be connected to the cpu to receive or send information. 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. In an optical system, it uses an array of sensors like a grid on the screen where touch is categorized into the coordinates of the sensors on the grid. Dear aspirant, as you know computer is very important section to get a good score for bank exam. Projectors are often used in meetings and presentations so that everyone in the room can view the presentation. Note that some peninput devices, such as the tablet pc, use an inductive sensing technology that can only sense contact from a specially instrumented stylus. Every computer performs the basic functions of input, processing, storage, output. Sort which are the input and output devices of the computer and write their names 6. The devices which are used to give data and instructions to the computer are called input devices.
Output devices are pieces of computer hardware used to communicate the results of data processing performed by a computer. This is a ball which is half inserted and by moving fingers on ball, pointer can be moved. Mcq input and output device of computer with answers pdf. The data entered through input device can be some text, some graphical image or symbol, sound etc, depending on the form of the raw data the various input devices are available. Computer organization pdf notes co notes pdf smartzworld. Device that takes image from a computer screen and projects it onto a larger screen p. Computer devices computer input and output devices 992019 designed by. Now a day computer is one of the most important field for every examinations.
Output device can produce the final product of machine processing into a form usable by humans. Cpu controls all the connected input and output devices. An input device is any hardware component that allows a user to enter data and instructions into a computer. The computer will be of no use unless it is able to communicate with the outside world. Crt monitor, tftlcd monitor, ipslcd monitor, led monitor, touch screen as an output device, multimedia projector, laser printer, inkjet printer, dot matrix printer, wide format printer, 3d. An input device is a hardware device that is used to provide input data. Chapter 5 inputoutput devices computer science igcse. For example, as you can see in the top half of the image, a keyboard sends electrical signals, which are received by the computer as input. Various types of input devices can be used with the computer depending upon the type of data you want to enter in the computer, e. A track ball comes in various shapes like a ball, a button and a square. Device that transmits and receives documents over telephone lines p. 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. Pdf computer input and output devices ingamule siraji.
This chapter will show you how inputoutput devices work. Hardcopy output refers to printed output printed on the paper or some material that can be touched and carried for being shown to others. In this section you will learn about the different types of output devices that are commonly in use. Devices input and output unit 4 input output devices. Jun 18, 2016 tags about input devices basic input output devices of computer dca notes of input devices difference between joystick and trackball different types of input devices. An input devices converts the data and instructions into binary form that computer can understand. Input devices o level computer science 2210 prepared by. 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. Notes for 3rd class computers input and output devices. 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. Thus, a computer must have a system to receive information from the outside world and must be able to communicate results to the external world. What is the difference between an input and output device.
Output devices are those devices which display the required result in simple words which display the final result. Since the whole device is not moved, a track ball requires less space than a mouse. Output deviceoutput devices return processed data that is information, back to the user. It forms images from tiny dots, called pixels that are. For example, the speakers of a multimedia computer system are directly connected to a device controller called an audio card such as a soundblaster, which in turn is connected to the. These inputoutput devices are also known as peripherals since they surround the cpu and memory of a computer system. We have also included some important questions that are repeatedly asked in previous exams. Input is usually given by clicking the mouse or typing on the keyboard. These scan through very thin slices of the object by the use of xrays, gamma rays and radio frequencies. Magnetic ink card readermicr micr input device is generally used in banks because of a large number of cheques to be processed every day. It forms images from tiny dots, called pixels that are arranged in a rectangular form. Output devices allow us to receive information from the computer.
The devices which are used to input the data and the programs in the computer are known as input devices. They are directly connected to an electronic module inside the systems unit called a device controller. Jan 05, 2017 the devices which are used to give data and instructions to the computer are called input devices. As you know computer is very important section to get a good score for bank exam. Introduction input and output devices are very important for computers, without them,computers will not be as functional. Nov, 2018 however, some devices can accept input and display output, and they are referred to as io devices input output devices. Input device translates words, sounds images, and actions that people understand into symbols that the system unit can process. A joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. Joysticks are often used to control video games, and usually have one or more pushbuttons whose state can also be read by the computer. Pointing devices a pointing device, or sometimes called a pointing tool, is a hardware input device that allows the user to. Input devices bring information into the computer and output device send. Input devices keyboard one of the primary input devices used with a computer. This is ideal for word processing and other volume data and program entry activities. Mcqs on input and output devices gk objective question answer exam question answer for competitive exam of govt jobs.
These need a warm object to sense a touch in the glass screen this is in a heatsensitive system. 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. It will be useful for all sbiibpslic exams and other competitive exams. An input device is a hardware device that is used to provide input data instructions to a computer so that it can be processed. Once data has been input into a computer system and processed, it is now useful information. They are divided into two categories 1 manual input devices devices that need human involvement to input data. The microphone is used for various applications like adding sound to a multimedia presentation or for mixing music. These scanned images are then used in computer aided design cad, or sent to a d printer to take a 3d printout. Introduction to computers, anatomy of computers, input and output devices. Input and output devices of computer computer notes.
Following are few of the important output devices which are used in a computer. The following is a list of the most common input devices which are nowadays found in a computer system. The input devices translate the information into the form understandable by computer. Inputoutput devices are required for users to communicate with the computer. Student notes page 1 of 7 k aquilina input devices input is any data or instructions entered into the memory of a computer. Inputoutput devices and interaction department of computer.
Input and output devices are required for users to communicate with the computer. Computer output devices receive information from the computer, and carry data that has been processed by the computer to the user. Input devices only allow for input of data to a computer and output devices only receive the output of data from another device. Keyboards allow a computer user to input letters, numbers, and other symbols into a computer uses an arrangement of buttons or keys. Output devices notes on data entry for nios online course.
An output device works by receiving a signal from the computer and using that signal to perform a task to display the output. The keyboard looks very similar to the keyboards of electric typewriters, with some additional keys. Track ball is an input device that is mostly used in notebook or laptop computer, instead of a mouse. It only processes the information given by the input devices and sends the result to the output devices. Monitor monitor is perhaps the most important output device because people interact. Input and output devices school of computer science and. Monitors and printers are two of the most commonlyknown output. For example, below is a basic list of steps of how an output device works. Here we are providing sample questions in computer fundamentals. This transformation is performed by input interface.
Computer is fed with a lot of data to be processed and organised. Dear aspirants, welcome to online computer quiz in. Those signals are then interpreted by the computer and displayed, or output, on the. Input devices include keyboards, mouse, digital camera and light pen. Input devices it is an electromechanical device that can be used to enter data and instructions to the computer.
On a computer keyboard input device, if you type h, it sends inputs a signal to the computer. Here you can download the free lecture notes of computer organization pdf notes co notes pdf materials with multiple file links to download. Free notes for 3rd class computers input and output devices. Crt monitor, tftlcd monitor, ipslcd monitor, led monitor, touch screen as an output device, multimedia projector, laser printer, inkjet printer, dot matrix printer, wide format printer, 3d printer, speakers, motors, buzzers, heaters, lightslamps. Computer inputoutput ports and interfaces 1 terms and abbreviations. The devices are usually used for display, projection, or for physical reproduction. Monitor printer speaker headphone monitor a monitor is an output device similar. The need for input and output devices teachers notes time min activity further notes 5 introduce the topic. So dear reader i have provided top expected gk questions from input and output device of computer. Input and output devices input devices allow us to send information to the computer.
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