Computer Science Chapter 2: Input Devices

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Questions and Answers

What is the purpose of input devices?

To enter data into the computer (correct)

To process data within the computer

To output data after processing

To store data in the computer

Which of the following is an example of automatic data input?

Drawing with a graphics tablet

Scanning a barcode (correct)

Speaking to a voice recognition system

Typing on a keyboard

What is a source document?

A device used for manual data entry

A method for testing input devices

A place where data is processed

A document where data is first recorded (correct)

Which of the following correctly differentiates manual data input from automatic data input?

Manual input requires entering data one transaction at a time, whereas automatic input occurs directly from documents. Signup and view all the answers

Which input device is specifically designed for capturing written data?

Graphics tablet Signup and view all the answers

Which of the following input devices is primarily used for capturing video?

Digital stills camera Signup and view all the answers

What type of keyboard is designed for inputting letters, numbers, and symbols?

Alphanumeric keyboard Signup and view all the answers

Which input device reads text and converts it into machine-encoded text?

Optical character recognition (OCR) reader Signup and view all the answers

Which of the following is a type of pointing device?

Joystick Signup and view all the answers

Which of these input devices is NOT categorized as a scanning device?

Keyboard Signup and view all the answers

What is a characteristic of the QWERTY keyboard?

It produces unique digital codes for each key pressed. Signup and view all the answers

Which of the following methods is NOT a way to connect a keyboard to a computer?

Inductive charging Signup and view all the answers

What feature is commonly found in a gaming keyboard?

Macro keys that can be preset for specific functions. Signup and view all the answers

What is the primary function of a Braille keyboard?

To allow visually impaired users to enter text through touch. Signup and view all the answers

How does an eye-controlled keyboard function?

It allows users to select keys by focusing their eyes on them. Signup and view all the answers

What distinguishes a concept keyboard from a standard keyboard?

It has a flexible membrane with customizable overlays. Signup and view all the answers

What technology allows for text conversion from scanned documents into editable formats?

Optical character recognition (OCR) Signup and view all the answers

How do barcode readers facilitate the checkout process in supermarkets?

By scanning the barcode to determine the item's price and details Signup and view all the answers

What function does the optical scanner perform in OCR readers?

It reads text by sensing reflected light patterns Signup and view all the answers

What is a key benefit of using barcode systems in libraries?

They allow for quick tracking of borrowed and returned books Signup and view all the answers

What technology does an OCR reader primarily utilize to identify characters?

Patterns of reflected light Signup and view all the answers

What is the primary function of the buttons on a mouse?

To select objects and perform actions on the screen Signup and view all the answers

How is dragging and dropping performed using a mouse?

By placing the pointer over an item and holding the left button while moving it Signup and view all the answers

What distinguishes an optical mouse from a traditional mouse?

It emits a red light to detect motion Signup and view all the answers

Which feature of the trackball mouse makes it suitable for users with repetitive strain injuries?

Its use of a ball on top that requires less wrist movement Signup and view all the answers

What action is performed when the left mouse button is clicked and released quickly?

Clicking to select an item Signup and view all the answers

Which of the following is a characteristic of a wired mouse?

It is connected to the computer using a USB cable Signup and view all the answers

What is a common use of right clicking on a mouse?

To display a list of options or commands Signup and view all the answers

Which type of mouse tends to be less precise than a traditional mouse?

Trackball mouse Signup and view all the answers

Which input device allows users to select commands by blinking at an icon?

Eye-controlled mouse Signup and view all the answers

What is the primary use of a joystick in computing?

Controlling object movement in games Signup and view all the answers

What distinguishes a digitising tablet from other input devices?

It converts analogue data into digital form. Signup and view all the answers

Which device is commonly integrated into laptop computers and resembles a pencil eraser?

Pointing stick mouse Signup and view all the answers

Which input device requires physical pressure to operate?

Touchpad mouse Signup and view all the answers

Which device can be used to make digital hand-drawn sketches?

Digitising tablet Signup and view all the answers

What is the main function of buttons located near the touchpad mouse?

To select features on the screen Signup and view all the answers

How does a puck function with a digitising tablet?

It is moved over the surface to digitize images. Signup and view all the answers

Which statement is true regarding a pointing stick mouse?

It protrudes from the keyboard for cursor movement. Signup and view all the answers

What feature sets the eye-controlled mouse apart from traditional mice?

Operates through eye movements Signup and view all the answers

What industry primarily uses Magnetic Ink Character Recognition (MICR) readers?

Banking Signup and view all the answers

Which of the following pieces of information is NOT encoded on a bank cheque?

Customer's social security number Signup and view all the answers

What does the MICR reader primarily recognize as the document passes through it?

Shapes of the characters Signup and view all the answers

What is the main function of an Optical Mark Recognition (OMR) reader?

To detect dark patches on paper Signup and view all the answers

In what situation are OMR readers primarily used?

Conducting surveys Signup and view all the answers

How does an OMR reader determine the meaning of the data?

By analyzing the intensity of reflected light from the marks Signup and view all the answers

What special type of ink is used to print the amount on a cheque for MICR readers?

Magnetic ink containing iron oxide Signup and view all the answers

Which application of OMR involves marking selections on a ticket?

Electronic lotteries Signup and view all the answers

What happens to the money once a cheque is cashed?

It is transferred from the customer's account to the payee's account Signup and view all the answers

What type of forms usually include pre-printed empty boxes for OMR readers?

Survey forms Signup and view all the answers

Study Notes

Importance of Input Devices

Essential for a computer to accept, process, and produce output data.
Input devices allow users to enter data into a computer system.

Data Capture

First stage of data entry into a computer.
Data capture can be manual or automatic.
Manual Data Input: Involves hand entry of data, one transaction at a time using devices like keyboards and mice.
Automatic Data Input: Data is directly transferred into the computer from source documents (e.g., barcodes, OMR slips).

Source Documents

Source documents are initial records from which data is collected and entered into a computer.

Types of Input Devices

Common input devices:
- Keyboards
- Mice
- Joysticks
- Scanners (e.g., flatbed, drum, MICR, OMR, OCR)
- RFID devices
- Voice data entry systems
- Digital cameras
- Smart cards

Characteristics of Input Devices

Input devices vary in design and functionality, targeting specific data entry needs.
They provide a means for interaction between the user and the computer system.

Uses of Various Input Devices

Keyboards: For entering text and commands.
Mice: For navigating interfaces and selecting objects.
Scanners: For digitizing physical documents and images.

Keyboards

Two main types:
- Alphanumeric Keyboards: Standard keyboards with letters and numbers, based on the QWERTY layout.
- Special-Function Keyboards: Designed for specific purposes (e.g., Braille keyboards, eye-controlled keyboards).
Connection methods: USB, wireless, on-screen, or built-in designs.

Ergonomics of Keyboards

Ergonomic keyboards are designed for comfort during prolonged use.
Gaming keyboards feature programmable keys for enhanced gameplay.

Pointing Devices

Used to control the cursor on graphical operating systems.
Examples include optical mice, trackball mice, touchpads, and pointing stick mice.

Optical Recognition Technologies

MICR Readers: Used mainly in banking for reading encoded characters on cheques.
OMR Readers: Detect the position of marks on paper, commonly used in exams and surveys.
OCR Technology: Converts scanned text into editable formats.

Barcode and Magnetic Strip Readers

Barcode Readers: Scan items at checkouts to provide product information and updates to stock levels.
Magnetic Stripe Readers: Identify users via information encoded in magnetic strips on cards.

Audio and Video Input Devices

Include voice recognition systems, sound capture devices, digital cameras, and more.
Voice recognition allows hands-free control of computers by interpreting spoken commands.

Digital Cameras

Capture images without film, storing them as digital data (pixels).
Advantages: Instant photo availability, easy editing, and sharing capabilities.

Smart Cards

Feature a microchip for secure transactions, making them more resistant to forgery compared to magnetic strip cards.

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Description

Explore the essential role of input devices in computing with this quiz. You'll learn about the importance of data capture, the differences between manual and automatic data input, and various types of input devices. Test your understanding of their characteristics and uses.