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Input&Output Devices
Input & Output Devices
| Question | Answer |
|---|---|
| What is an input device? | A hardware that lets you enter data or commands into a computer. |
| What is a peripheral? | Any device connected to the computer that the CPU controls. |
| What are three ways input devices gain information? | By sensing light, sound, or pressure/touch. |
| What are two functions of input devices? | Accepts digital data via devices such as keyboards and barcode readers. Accepts analogue data from devices such as microphones and sensors. |
| What do input devices that sense light do? | They detect light patterns to capture data. |
| What is a barcode reader? | A device that scans and interprets black and white line patterns. |
| Where are barcode readers used? | Airlines, healthcare, and shipping. |
| What is a fingerprint reader? | A device that captures and compares fingerprint images to stored data. |
| Where are fingerprint readers used? | Devices, secure areas, and border control. |
| What is an Optical Character Reader (OCR)? | A device that reads printed text shapes and converts them to digital data. |
| Where is OCR used? | eBook creation and form processing. |
| What do digital cameras and webcams do? | Capture digital images and video. |
| What are uses of digital cameras and webcams? | Photography, videography, and video messaging. |
| What is a document scanner? | A device that converts physical pages to digital images. |
| Where are document scanners used? | Book scanning and document management. |
| What is a light pen? | A pen-like device that draws directly on CRT monitors. |
| What is a light pen used for? | Capturing handwriting and precise digital art. |
| What does an Optical Mark Reader (OMR) do? | Detects marks on paper and converts them into data. |
| Where is OMR used? | Lotteries and marking exams. |
| What does a light sensor do? | Measures light or movement. |
| Where are light sensors used? | Greenhouses, factories, and security systems. |
| What is a microphone? | A device that converts sound into digital signals. |
| Use of microphones? | Virtual assistants, speech recognition, assistive tech. |
| What is MIDI? | A protocol to record and play digital music. |
| Where is MIDI used? | Music production and digital instrument communication. |
| What is a joystick? | A lever-based device for screen pointer movement. |
| Where is a joystick used? | Assistive tech and video games. |
| What is a keyboard? | A device that inputs letters, numbers, and commands. |
| Uses of a keyboard? | Typing, commands, and office apps. |
| What is a mouse? | A pointing device to control the cursor. |
| What is a touch sensor? | A sensor that measures pressure and physical touch. |
| Where are touch sensors used? | Farming, logistics, manufacturing, and security. |
| What is a touchscreen? | A screen you interact with using touch. |
| What is a touchscreen? | A screen you interact with using touch. |
| Where are touchscreens used? | ATMs, kiosks, and tablets. |
| What does OCR stand for? | Optical Character Recognition. |
| What does MICR stand for? | Magnetic Ink Character Recognition. |
| What is the purpose of OCR? | To read printed text and convert it to digital. |
| What is MICR used for? | Reading characters written in magnetic ink (often on checks). |
| What are input devices that sense sound? | Microphones and MIDI instruments. |
| What are input devices that sense pressure or touch? | Joystick, keyboard, mouse, touch sensor, touchscreen. |
| What is an output device? | A device that shows or plays the results of computer processing, like text, images, or sounds. |
| What are the three types of output from a computer? | Visual, Audible, and Storage output. |
| What is a hard copy? | A tangible permanent printed output from the computer. |
| What is a soft copy? | An intangible temporary output displayed or played by visual/audio devices. |
| What device category do printers fall under? | Output devices that produce printed output. |
| How does a dot matrix printer work? | It uses pins and a ribbon to create images by forming dots. |
| Where is a dot matrix printer commonly used? | Printing on thicker paper or card. |
| How does an inkjet printer work? | It sprays ink through nozzles onto paper. |
| What is inkjet printing good for? | Colour printing of small quantities. |
| How does a laser printer work? | It uses laser and drum technology, like a photocopier. |
| What is laser printing used for? | High-volume printing and documents that won’t smudge. |
| How fast can a laser printer print? | More than 30 pages per minute. |
| What is a 3D printer? | A printer that creates 3D objects by layering materials. |
| What are uses of 3D printers? | Architectural models, biomedical devices, car parts. |
| What is a thermal printer? | A printer that uses heat on special paper to print. |
| What is thermal printing good for? | Receipts and low-cost printouts. |
| What is a plotter? | A printer that draws on large paper using pens or ink. |
| What is a plotter used for? | Architectural drawings, signs, and murals. |
| What is print speed measured in? | Pages per minute (ppm), lines per minute (lpm), or characters per second (cps). |
| Why is printer memory important? | It stores and processes print jobs sent to the printer. |
| What is paper tray capacity? | The number of sheets a printer can hold without reloading. |
| Which printer type is best for high-quality colour documents in small quantity? | Inkjet printer. |
| Which printer type is best for large-scale black-and-white document printing? | Laser printer. |
| What feature of a printer affects how sharp the images are? | Resolution (DPI). |
| What does DPI stand for in printers? | Dots Per Inch (used to measure resolution). |
| Which printer has high smudge-resistance? | Laser printer. |
| What is another name for a monitor? | Visual Display Unit (VDU), screen, or CRT. |
| What does a VDU do? | Displays program output, messages, or input data. |
| What are three factors to consider when selecting a VDU? | Type, size, and resolution. |
| What does screen resolution affect? | Image quality; higher resolution means better quality. |
| Name two types of VDU technology. | LCD and LED. |
| What does a soft copy appear on? | A monitor or screen. |
| Name three devices that produce audible output. | Speakers, headphones, earphones. |
| When is audio output especially useful? | For virtual assistants, visual impairments, media, and alerts. |
| What output type does a speaker produce? | Audible sound. |
| Why would someone use headphones instead of speakers? | For private listening or in noise-sensitive environments. |
| What role do speakers play in video calls? | They output voice and sound. |
| Why is audible output helpful in emergencies? | For delivering alerts and warnings. |
Created by:
Attasha
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