Input Devices

1.Define input device?
In computing, an input device is any 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.

2.How input devices can be classified?
  • Modality of input (e.g. mechanical motion, audio, visual, etc.)
  • The input is discrete (e.g. key presses) or continuous (e.g. a mouse's position, though digitized into a discrete quantity, is fast enough to be considered continuous)
  • The number of degrees of freedom involved (e.g. two-dimensional traditional mice, or three-dimensional navigators designed for CAD applications)

3.What is direct input?
With direct input, the input space coincides with the display space, i.e. pointing is done in the space where visual feedback or the pointer appears.

4.Example for direct input?
Touchscreens and light pens.

5.Example for indirect input?
Mouse and trackball.

6.What is a keyboard?
A 'keyboard' is a human interface device which is represented as a layout of buttons. Each button, or key, can be used to either input a linguistic character to a computer, or to call upon a particular function of the computer.

7.Examples for keyboard?
  • Computer keyboard
  • Keyer
  • Chorded keyboard
  • LPFK

8.What is a pointing device?
A pointing device is any human interface device that allows a user to input spatial data to a computer.

9.Give examples for analog devices?
3D mice, joysticks, or pointing sticks.

10.What is a High-degree of freedom input devices?
High-degree of freedom input devices are the devices allow many continuous degrees of freedom as input.

11.Application of High-degree of freedom input devices?
High-degree of freedom input devices are typically used in CAVEs.

12.What is a composite device?
Input devices, such as buttons and joysticks, can be combined on a single physical device that could be thought of as a composite device.

13.Give examples for composite devices?
  • Game controller
  • Gamepad (or joypad)
  • Paddle (game controller)
  • Wii Remote
  • Microsoft Kinect Sensor

14.What are Imaging and Video input devices?
Video input devices are used to digitize images or video from the outside world into the computer. The information can be stored in a multitude of formats depending on the user's requirement.

15.Give examples for Imaging and Video input devices?
  • digital camera
  • Webcam
  • Image scanner
  • Fingerprint scanner
  • Barcode reader
  • 3D scannerLaser rangefinder

16.Application of Imaging and Video input devices inthe field of medical science?
  • Computed tomography
  • Magnetic resonance imaging
  • Positron emission tomography
  • Medical ultrasonography

17.What are audio input devices?
In the fashion of video devices, audio devices are used to either capture or create sound. In some cases, an audio output device can be used as an input device, in order to capture produced sound.

18.Examples for audio input devices?
  • Microphone
  • MIDI keyboard 

19.What is a computer keyboard?

In computing, a keyboard is a typewriter-style keyboard, which uses an arrangement of buttons or keys, to act as mechanical levers or electronic switches. 

20.What is called a mouse?
A mouse is a pointing device that functions by detecting two-dimensional motion relative to its supporting surface. 

21.What are the different categories of mouse?
  • Mechanical mice
  • Optical and laser mice
  • Inertial and gyroscopic mice
  • 3D miceTactile mice

22.What is pen computing?

Pen computing refers to a computer user-interface using a pen (or stylus) and tablet, rather than devices such as a keyboard, joysticks or a mouse.

23.What is Optical character recognition?
Optical character recognition, usually abbreviated to OCR, is the mechanical or electronic translation of scanned images of handwritten, typewritten or printed text into machine-encoded text.

24.What is voice recognition method?
It refers to finding the identify of "who" is speaking, rather than what they are saying.

25.What is touchscreen technology?
A touchscreen is an electronic visual display that can detect the presence and location of a touch within the display area.

26.Which are the common devices which use touchscreen technology?

Game consoles, all-in-one computers, tablet computers, smartphones.

27.What is punched card?
A punched card, punch card, IBM card, or Hollerith card is a piece of stiff paper that contains digital information represented by the presence or absence of holes in predefined positions.

28.What is punched tape?
Punched tape or perforated paper tape is a form of data storage, consisting of a long strip of paper in which holes are punched to store data.

29.what is a keyer?
A keyer is a device for signaling by hand, by way of pressing one or more switches. Modern keyers typically have a large number of switches but not as many as a full-size keyboard.

30.what is a chorded keyboard?

A keyset or chorded keyboard (also called a chorded keyset, chord keyboard or chording keyboard) is a computer input device that allows the user to enter characters or commands formed by pressing several keys together, like playing a "chord" on a piano.

31.what is LPFK?
The Lighted Program Function Keyboard (LPFK) is a computer input device manufactured by IBM that presents an array of buttons associated with lights.

32.what is a pointing device?

A pointing device is an input interface (specifically a human interface device) that allows a user to input spatial (i.e., continuous and multi-dimensional) data to a computer. 

33.what is a joystick?

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.

34.what is a pointing stick?

The pointing stick (trademarked by IBM as the TrackPoint and by Synaptics as the TouchStyk) is an isometric joystick used as a pointing device (compare especially touchpad and trackball).

35.what is a game controller?

A game controller is a device used with games or entertainment systems to provide input to a video game, typically to control an object or character in the game. 

36.what is gamepad?

A gamepad (also called joypad or control pad), is a type of game controller held in two hands, where the fingers (especially thumbs) are used to provide input.

37.what is a paddle?

A paddle is a game controller with a round wheel and one or more fire buttons, where the wheel is typically used to control movement of the player object along one axis of the video screen.

38.what is a wii remote?

The Wii Remote, also known as the Wiimote, is the primary controller for Nintendo's Wii console. 

39.what is a kinet?
Kinet is a motion sensing input device by Microsoft for the Xbox 360 video game console and Windows PCs.

40.what is a digital camera?
A digital camera (or digicam) is a camera that takes video or still photographs, or both, digitally by recording images via an electronic image sensor.

41.what is a webcam?
A webcam is a video camera that feeds its images in real time to a computer or computer network, often via USB, Ethernet, or Wi-Fi.

42.what is fingerprint recognition?

Fingerprint recognition or fingerprint authentication refers to the automated method of verifying a match between two human fingerprints.

43.what is a barcode reader?

A barcode reader (or barcode scanner) is an electronic device for reading printed barcodes.

44.what is a 3D scanner?
A 3D scanner is a device that analyzes a real-world object or environment to collect data on its shape and possibly its appearance (i.e. color).

45.what is a laser range finder?

A laser rangefinder is a device which uses a laser beam to determine the distance to an object.

46.what is a microphone?
It is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal. 

47.what is a MIDI keyboard?
A MIDI keyboard is typically a piano-style user interface keyboard device used for sending (MIDI) signals or commands over a USB or MIDI cable to other devices connected and operating on the same MIDI protocol interface.

48.what is an image sanner?

In computing, an image scanner—often abbreviated to just scanner—is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image.

49.what is light pen?

A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's CRT TV set or monitor.

50.what is a trackball?

A trackball is a pointing device consisting of a ball held by a socket containing sensors to detect a rotation of the ball about two axes—like an upside-down mouse with an exposed protruding ball.


See All Responses Below...
Message Rating
Posted on:
Please Login to Post Your Comments
Name (Max. 100 characters)
Please post your comments here
Select Language
Attach File(Max. Size: 2 MB)
A few simple rules when posting your Comments,
  1. Please post only answers relevant to the topic of discussion.
  2. Please dont misuse this site or do not be abusive, offensive, inappropriate,harass anyone on the boards or post ads or spam. Doing so will delete your inappropriate messages and will block or delete your account on this site. 

Academic Projects