Computer Input Devices Overview

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Questions and Answers

What type of pointing device is a trackball?

A handheld device requiring movement

A stationary device with a ball on its top (correct)

A stationary device with a screen

A wireless device that moves seamlessly

Which action is a typical operation performed with a mouse?

Push sideways

Drag (correct)

Press with force

Swipe vertically

What is the primary function of an input device?

To manage the power supply to other components

To store data permanently

To output data to the user

To allow users to enter data and instructions into a computer (correct)

Which of the following best describes a touchpad?

A rectangular device sensitive to pressure and motion Signup and view all the answers

Which of the following describes an ergonomic keyboard?

A keyboard that minimizes wrist and hand injuries Signup and view all the answers

What distinguishes a pointing stick from other pointing devices?

It is a pressure-sensitive device positioned between keys Signup and view all the answers

What distinguishes wireless keyboards from wired keyboards?

Wireless keyboards use Bluetooth or IrDA for connection Signup and view all the answers

What feature does a touch screen provide?

It is an interactive display sensitive to touch Signup and view all the answers

What is the main advantage of predictive text input on mobile device keypads?

It saves time when entering text Signup and view all the answers

Which operation is NOT typically associated with mouse usage?

Tilt Signup and view all the answers

How does a wireless mouse operate?

It sends signals via radio frequency or infrared Signup and view all the answers

Which of the following is NOT an input device?

Monitor Signup and view all the answers

What is a common feature of most desktop computer keyboards?

They contain keys for entering data and instructions Signup and view all the answers

Which of the following is not a function of a mouse?

Generate sound Signup and view all the answers

Which of the following best describes the function of a mouse as a pointing device?

To facilitate navigation and interaction on the screen Signup and view all the answers

What is an advantage of having a smaller keyboard on mobile devices?

It makes the device more portable Signup and view all the answers

Which input device is specifically designed for users with limited dexterity?

Keyboard with larger keys Signup and view all the answers

What device allows users to access their bank accounts remotely?

Automated teller machine (ATM) Signup and view all the answers

Which of the following is NOT an example of an input device for physically challenged users?

Regular mouse Signup and view all the answers

Which input method involves the use of facial expressions or head movements?

Gesture recognition Signup and view all the answers

What type of device is a DVD kiosk classified as?

Self-service machine Signup and view all the answers

What is the primary function of optical character recognition (OCR)?

To read characters from ordinary documents Signup and view all the answers

Which device is used to read hand-drawn marks such as small circles?

Optical mark recognition (OMR) device Signup and view all the answers

What type of document is referred to as a turnaround document?

A document returned to the company that issued it Signup and view all the answers

How does an RFID reader gather information?

By using radio signals to communicate with tags Signup and view all the answers

What does an optical mark recognition (OMR) device primarily match?

Patterns of light to detect marks Signup and view all the answers

Which of the following applications is NOT associated with RFID technology?

Reading text documents Signup and view all the answers

What type of scanner uses laser beams to read product labels?

Bar code reader Signup and view all the answers

What type of information can RFID technology track?

Pressure measurements of tires Signup and view all the answers

What is the function of a game controller in video games?

To direct movements and actions of on-screen objects Signup and view all the answers

What is resolution in the context of digital cameras?

The number of horizontal and vertical pixels in a display Signup and view all the answers

Which of the following is NOT a type of game controller mentioned?

Graphic tablets Signup and view all the answers

How do you use pen input?

By touching a stylus or digital pen on a flat surface Signup and view all the answers

What is a common feature of digital cameras?

Storage of images digitally Signup and view all the answers

What determines the quality of digital camera photos?

Resolution and number of bits stored in each pixel Signup and view all the answers

Which of the following is a feature of touch-sensitive pads?

They detect pressure and touch Signup and view all the answers

What type of digital camera is commonly used for casual photography?

Point-and-shoot camera Signup and view all the answers

Study Notes

Input Devices

Input is any data and instructions entered into the memory of a computer

An input device serves a crucial role in computing by facilitating the interaction between the user and the computer system. These devices translate physical actions, such as typing or clicking, into a format that the computer can understand, enabling effective communication and operation of software applications.

Keyboard

A keyboard is an input device that contains keys users press to enter data and instructions into a computer
Most desktop computer keyboards have wired and wireless variations
- Wired keyboards have a USB port
- Wireless keyboards have bluetooth and IrDA connections
An ergonomic keyboard is designed to reduce the chance of wrist and hand injuries
Keyboards on mobile devices are smaller and/or have fewer keys
- Some phones use predictive text input to save time entering text

Pointing Devices

A mouse is a pointing device that fits under the palm of your hand, the most widely used pointing device on desktop computers
- Mice can be wired or wireless
Mouse operations include:
- Point
- Click
- Right-click
- Double-click
- Triple-click
- Drag
- Right-drag
- Rotate wheel
- Free-spin wheel
- Press wheel
- Tilt wheel
- Press thumb button
Other pointing devices include:
- Trackball - stationary pointing device
- Touchpad - flat, small, rectangular pointing device sensitive to pressure
- Pointing Stick - pressure-sensitive pointing device shaped like a pencil eraser on a keyboard

Touch Screens and Touch-Sensitive Pads

A touch screen is a touch-sensitive display device
Touch-sensitive pads are found in devices like the Microsoft Surface

Pen Input

Pen input uses a stylus or digital pen to write, draw, or make selections on a flat surface

Game Controllers

Game controllers are input devices used in video and computer games to control on-screen objects
Game controllers include variations like:
- Gamepads
- Joysticks
- Light guns
- Wheels
- Dance pads
- Motion-sensing controllers

Digital Cameras

Digital cameras allow users to take pictures and store them digitally
Digital camera types include:
- Studio cameras
- Field cameras
- Point-and-shoot cameras
Resolution and the number of bits stored in each pixel affect digital camera photo quality
- Resolution is the number of horizontal and vertical pixels in a display device
- Each pixel consists of one or more bits of data
- More bits per pixel results in higher quality

Scanners and Reading Devices

Scanners read images and documents converting them into digital form
Scanner variations include:
- Flatbed
- Pen or Handheld
- Sheet-fed
- Drum
Optical character recognition (OCR) reads text from documents
Turnaround documents are returned to the company that created and sent them
Optical mark recognition (OMR) reads hand-drawn marks like circles or rectangles
Bar code readers use laser beams to read bar codes
RFID (radio frequency identification) uses radio signals to communicate with a tag placed on an object
- RFID is used for:
  - Tracking runners
  - Tracking location of soldiers
  - Tracking airline baggage
  - Managing inventory
  - Gauging pressure and temperature of tires

Other Input Devices

POS (point-of-sale) terminals record purchases, process payments, and update inventory
ATMs (automated teller machines) allow users to access their bank accounts
DVD kiosks are self-service DVD rental machines

Input Devices for Physically Challenged Users

Input devices exist to assist physically challenged users:
- Keyboards with larger keys
- On-screen keyboards
- Various on-screen pointing devices
- Head-mounted pointers
- Gesture recognition
- Computerized implant devices

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Description

This quiz covers the fundamentals of computer input devices, including keyboards and mice. Learn about their functions, variations, and ergonomic designs. Test your knowledge on how these devices enable user interaction with computers.