Chapter 5 inputoutput devices computer science igcse. Input devices are used to give data and instructions to the computer. Mcqs on input and output devices gk objective question answer exam question answer for competitive exam of govt jobs. The devices which are used to input the data and the programs in the computer are known as input devices. 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. An input device is any hardware component that allows a user to enter data and instructions into a computer. Input and output devices of computer computer notes. Inputoutput devices are required for users to communicate with the computer. 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. Magnetic ink card readermicr micr input device is generally used in banks because of a large number of cheques to be processed every day. An input device is any tool device for entering information into a computer. These devices are designed to read information into or out of the memory unit upon command from the cpu and are considered to be the part of computer system. When the computer gives the printout, it is the output. Each iop controls and manage the input output tasks.
An input output processor iop is a processor with direct memory access capability. Output devices monitor printer audio output projector 16. It forms images from tiny dots, called pixels that are arranged in a rectangular form. The chapter has given an introduction to the inputoutput devices. A temperature transducer is an example of an analog input device. When i draw using a mouse, it is an input to the computer. Dear readers, ibps clerk 2018 examination is approaching very shortly, after seeing the analysis of this year ibps exams you all may conclude that more practice will be need to manage the time efficiently and to score good marks. Output devices monitor features display resolution the resolution of a monitor indicates how densely packed the pixels are. It forms images from tiny dots, called pixels that are. Characteristics of impact printers are the following. Ingamule siraji 1 a computer is an electronic device that works.
An input device is a piece of hardware that is used to enter data into a computer. Keyboards allow a computer user to input letters, numbers, and other symbols into a computer uses an arrangement of buttons or keys. These scan through very thin slices of the object by the use of xrays, gamma rays and radio frequencies. A color monitor can display from 16 to over 1 million different colors. Many of these are less complex versions of io devices that have been available for larger computer systems. Output devices are part of the 4 main hardware components of a computer system. An output device is an electromechanical device which accepts data from a computer. 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. The need for input and output devices teachers notes time min activity further notes 5 introduce the topic. Once data has been input into a computer system and processed, it is now useful information.
Dec 29, 2016 an input devices converts the data and instructions into binary form that computer can understand. Keyboard and mouse are the most commonly used input devices. These inputoutput devices are also known as peripherals since they surround the cpu and memory of a computer system. Output devices output devices are used to receive information from the computer either in softcopy or hard copy. 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. Input and output devices school of information technology. 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. 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. Physics notes full book pdf mathematics notes full book pdf biology notes full book pdf chemistry notes. Analog signals are continuous and can have any number of statesnot just two, as with discrete digital signals. Aug 27, 2018 as you know computer is very important section to get a good score for bank exam. Monitors may be monochrome that will display results. It gives a detailed listing of the various types of input devices and the output devise. Sound card plays contents of digitized recordings, speakers attached to sound card.
Impact printers nonimpact printers impact printers the impact printers print the characters by striking them on the ribbon which is then pressed on the paper. Introduction input and output devices are very important for computers, without them,computers will not be as functional. Printer is an output device, which is used to print information on paper. Free notes for 3rd class computers input and output devices. Any device has to be connected to the cpu to receive or send information. Pictures on monitor are formed with picture elements called pixel. Output devices are used to display the result or information on the computer. Explain different types of output devices perfect computer. Input and output bridge the chasm between a computers inner world of bits, and the real world perceptible to the. They are divided into two categories 1 manual input devices devices that need human involvement to input data 2 automatic input devices devices that do not need human involvement to input data. The devices are usually used for display, projection, or for physical reproduction. An inputoutput processor iop is a processor with direct memory access capability. An input devices converts the data and instructions into binary form that computer can understand.
Now a day computer is one of the most important field for every examinations. Inputoutput devices and interaction computer science tufts. The following is a list of the most common input devices which are nowadays found in a computer system. Dear aspirant, as you know computer is very important section to get a good score for bank exam. In this section you will learn about the different types of output devices that are commonly in use. 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.
Input device translates words, sounds images, and actions that people understand into symbols that the system unit can process. Keyboard the most common and very popular input device which helps in inputting data to the computer. The inputoutput system module 2 3 analog devices in contrast to discrete devices, analog devices are input or output devices that provide or receive analog signals. The output device provides the output of data or information.
Output devices are those devices which display the required result in simple words to the users. The iop is similar to cpu except that it handles only the details of io processing. Virtually all external devices have buffers, control signals, status signals, and data bits. Input devices keyboard one of the primary input devices used with a computer. Input and output devices input devices allow us to send information to the computer. Mcq input and output device of computer with answers pdf. The keyboard is the most common and widely used input device. A sheet of paper can be used to both record ideas input and display them output. In simple terms, input devices bring information into the computer and output devices bring information out of a computer system. 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. Monitor, printer, plotter, speaker, and multimedia projector. Input is usually given by clicking the mouse or typing on the keyboard.
Any data or instruction entered into the computer is known as input. Student notes page 1 of 7 k aquilina input devices input is any data or instructions entered into the memory of a computer. The distinction between output devices and input devices becomes even. Cpu controls all the connected input and output devices. The audio output is the ability of the computer to output sound. Input devices pointing devices keyboard optical input devices audio input device video inpu device. Output devices an output device is any hardware component that conveys information to one or more people. Some commonly used inputoutput devices are listed in table below. There are two other commonly used mechanisms for implementing io operations. Computer output devices receive information from the computer, and carry data that has been processed by the computer to the user. What is the difference between an input and output device.
Monitor is the most commonly used output device used to display results of processing. Each iop controls and manage the inputoutput tasks. Output device can produce the final product of machine processing into a form usable by humans. Nov, 2018 however, some devices can accept input and display output, and they are referred to as io devices input output devices. Input devices it is an electromechanical device that can be used to enter data and instructions to the computer. Input device is a device through which data and instruction are entered into computer system. Keyboard keyboard is the most common input device used for entering text data directly into a computer.
Video input devices are used to entering full motion video recording into a computer. Keyboards allow a computer user to input letters, numbers, and other symbols into a computer. The computer transmits data to the drive, where it is saved and can be later accessed. Input devices these get data into the computer processor this does something with the data to make it useful information output devicesthese show the results of processing. Six widely used input devices are the keyboard, mouse, microphone, scanner, digital camera and pc video camera. This transformation is performed by input interface. Data that has been processed into a useful form, called information p.
Input devices include keyboards, mouse, digital camera and light pen. An input device is a hardware device that is used to provide input data instructions to a computer so that it can be processed. The keyboard looks very similar to the keyboards of electric typewriters, with some additional keys. Top 50 input output questions for ibps clerk mains 2018. Monitors graphic plotter printer monitors monitors, commonly called as visual display unit vdu, are the main output device of a computer. This chapter will show you how inputoutput devices work. Jan 05, 2017 input devices are used to give data and instructions to the computer. 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. Following are few of the important output devices which are used in a computer.
By inputoutput analysis i mean the latter two of these three types of inputoutput work, and it is to them that this paper is devoted. The size of a monitor is measured in inches diagonally across the screen. Most modern monitors can display 1024 by 768 pixels, the svga standard. 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. 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. Devices input and output unit 4 input output devices. Short questionsopen long questionopen 9th class notes links. Monitors and printers are two of the most commonlyknown output.
The microphone is used for various applications like adding sound to a multimedia presentation or for mixing music. Microphone gives sound or voice input to the computer. The purpose of the output devices is to translate data and information from electrical impulses to a humanreadable format. Notes for 3rd class computers input and output devices. An input device is a hardware device that is used to provide input data. An input device is any peripheral used to provide data and control signals to a computer. Top 50 inputoutput reasoning questions for ibps clerk mains 2018 free pdf download. 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. It only processes the information given by the input devices and sends the result to the output devices. In this, the computer system is divided into a memory unit and number of processors.
Conscious output is muscularly mediated communications. Output devices provide data in myriad different forms, some of which include audio, visual, and hard copy media. Pdf computer input and output devices ingamule siraji. Inputoutput modules overview inputoutput io modules provide physical interface between plc processor and field devices. To enter information and issue commands, you use input devices.
Examples of io devices are cd drives, dvd drives, usb drives, hard disk drives hdds, and floppy disk drives. These scanned images are then used in computer aided design cad, or sent to a d printer to take a 3d printout. Computer devices computer input and output devices 992019 designed by. Input devices an input device is any hardware component that allows you to enter data and instructions onto a computer. Pointing devices a pointing device, or sometimes called a pointing tool, is a hardware input device that allows the user to. An input device helps you to communicate with the computer. Top 50 input output reasoning questions for ibps clerk mains 2017. Microphone is an input device to input sound that is then stored in digital form. Out put devices are used to display results of processing to the user.