Computer Basics Chapter 4: Input and Output

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Questions and Answers

What is the primary purpose of a computer keyboard?

To display images on the screen

To produce audio output

To input characters at the cursor's location (correct)

To store data permanently

Which of the following is NOT a common type of pointing device?

Stylus

Scanner (correct)

Touch screen

Mouse

Which display technology uses charged liquid crystals?

OLED

Plasma

LCD (correct)

CRT

Which type of mouse tracks movement using light?

Optical mouse Signup and view all the answers

What feature distinguishes a stylus from a regular pen?

It can convert handwritten text into editable text Signup and view all the answers

What is a primary characteristic of interferometric modulator displays (IMOD)?

Utilizes external light to display images Signup and view all the answers

What is a characteristic of a touch screen?

It can be used for input without any physical contact Signup and view all the answers

Which type of display is most commonly used for large screens?

Plasma Signup and view all the answers

Which device is primarily used to capture images?

Digital camera Signup and view all the answers

What differentiates LED technology from other flat-panel displays?

It can emit light on its own. Signup and view all the answers

Which of the following is a function of pointing devices?

To select and manipulate objects Signup and view all the answers

What is the primary technology used by laser printers to produce images on paper?

Toner powder Signup and view all the answers

For which type of device is handwriting recognition typically used?

Digital pens/styluses Signup and view all the answers

What type of projector is described as displaying computer output onto a wall or screen?

Data projector Signup and view all the answers

What do optical or laser mice have in common?

They track movement using a light source Signup and view all the answers

Which of the following statements is true regarding plasma displays?

They consist of layers of gas to create images. Signup and view all the answers

Which of the following devices does NOT provide input?

Printer Signup and view all the answers

Which display technology is notable for its ability to produce images even in bright sunlight?

IMOD Signup and view all the answers

Which characteristic is essential for comparing display devices?

Color fidelity Signup and view all the answers

What is a common print resolution range for laser printers?

600 to 2,400 dpi Signup and view all the answers

Which of the following is NOT a characteristic of ink-jet printers?

Use toner cartridges Signup and view all the answers

What type of printers are typically recommended for home use?

Ink-jet printers Signup and view all the answers

Which feature differentiates multifunction printers from standard printers?

Can print, scan, and fax Signup and view all the answers

Which of the following types of printers is specifically designed for producing high-quality photographs?

Photo printers Signup and view all the answers

What output method do audio devices such as headphones and speakers utilize?

Audio output Signup and view all the answers

Which of these is a potential future application for printers?

Dispensing liquid metal Signup and view all the answers

What is a defining characteristic of an optical mouse?

It operates using light for tracking. Signup and view all the answers

What is the primary benefit of source data automation?

It saves time and enhances accuracy. Signup and view all the answers

Which type of scanner is specifically designed for both flat and three-dimensional objects?

3D scanner Signup and view all the answers

How is optical resolution of scanned images typically measured?

In number of dots per inch (dpi) Signup and view all the answers

What technology is utilized in RFID to identify objects?

Radio frequency identification Signup and view all the answers

What does optical character recognition (OCR) enable a computer to do?

Recognize scanned text characters as text. Signup and view all the answers

Which type of reader is specifically used for banking transactions?

Magnetic ink character recognition (MICR) reader Signup and view all the answers

What feature helps biometric readers ensure only authorized individuals gain access?

Unique physiological characteristics Signup and view all the answers

What is an essential characteristic of digital cameras compared to traditional cameras?

They record images on a digital storage medium. Signup and view all the answers

What is a common application of barcode readers?

Reading product codes for inventory management Signup and view all the answers

What is the primary appeal of digital still cameras?

They provide immediate availability of images. Signup and view all the answers

How is camera quality primarily measured in digital still cameras?

In megapixels. Signup and view all the answers

Which of the following formats is NOT commonly used for storing images in digital video cameras?

Cloud storage. Signup and view all the answers

What technology is used for converting spoken words into digital form?

Voice input processes. Signup and view all the answers

What type of applications commonly utilize surveillance video cameras?

Safety and security systems. Signup and view all the answers

Which of the following is NOT a typical application of voice input systems?

Inputting music from instruments. Signup and view all the answers

Which technology is utilized with voting ballots and Scantron test forms?

Optical Mark Recognition (OMR). Signup and view all the answers

What is typically necessary alongside software for a voice input system to function?

A microphone or headset. Signup and view all the answers

Study Notes

Input and Output Devices

Keyboards: Essential input devices for data entry; types include wired, wireless, built-in, and on-screen keyboards. Typical features are alphanumeric keys, function keys, and a numeric keypad.
Pointing Devices: Include mice, pens/styluses, and touch screens for selecting and manipulating on-screen objects.
Mouse: Controls a pointer on-screen, can be mechanical, optical, or laser; may also be wireless.
Stylus: A pen-like tool for drawing or writing on touch screens; can facilitate handwriting recognition, converting written input to text.
Touch Screens: Allow user interaction via finger gestures; commonly found in mobile devices, kiosks, and laptops.

Scanners and Readers

Scanners: Optical devices that capture images of documents and convert them into digital format. Types include flatbed, portable, and 3D scanners.
Optical Character Recognition (OCR): Converts scanned text into editable text, recognizing various fonts.
Barcode Readers: Devices that read machine-readable codes, widely used for UPC, ISBN, and QR codes for data representation.
RFID Readers: Utilize radio-frequency technology for data capture from RFID tags, useful in asset tracking and inventory management.
Biometric Readers: Recognize unique physical characteristics for security access, including fingerprints, face geometry, and voice recognition.

Digital Cameras

Digital Cameras: Capture images digitally instead of using film, come in formats like still cameras and camcorders. Quality is often denoted in megapixels, with storage on flash memory.
Applications: Include surveillance, video conferencing, and mobile photography, while PC cameras serve desktop purposes.

Audio Input and Output

Audio Input: Involves voice and music data entry through microphones and headsets; useful in voice recognition and digital recording.
Audio Output: Provides sound through speakers and headphones, essential for multimedia experiences.

Display Devices

Display Devices: Present visual output; includes monitors for desktops and screens integrated into portable devices.
Display Technologies: Varieties include CRT, LCD, LED, OLED, and plasma, each utilizing different methods for image rendering.
Screen Resolution: Refers to the clarity of displayed images, influenced by the number of pixels.

Printers

Printers: Devices that produce physical copies; categorized by printing technology (impact vs. nonimpact), color capabilities, and connection type (USB, Wi-Fi).
Laser Printers: Use toner to produce high-quality documents efficiently; commonly used in businesses for speed and resolution.
Ink-Jet Printers: Spray ink to create images, favored for home use but generally slower and with lower quality compared to laser printers.
Special-Purpose Printers: Include photo printers, barcode printers, and portable printers, each tailored for specific output needs.

Key Characteristics

Input Devices: Encompass keyboards, mice, scanners, and biometric input systems geared towards user interaction with computers.
Output Devices: Include printers and display screens reflecting the processed data visually or audibly for user consumption.

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Description

This quiz covers Chapter 4 of computer basics focusing on input and output devices. You'll learn about keyboards, pointing devices, scanners, digital cameras, and audio input. Test your understanding of the various tools that facilitate interaction with computers today.