Chapter 6 Solution

Discovering Computer 2011 – Living in a Digital World
Page 335-336
Lecturer : Tri Djoko Wahjono

True/False

  1. The form of output generated by a computer varies depending on the hardware and software being used and the requirements of the user. (True)
  2. Information on a display device sometimes is called soft copy. (True)
  3. Most mobile computers and devices do not integrate the display and other components into the same physical case. (False)
  4. Widescreen LCD monitors are wider than they are tall. (True)
  5. Brightness describes the difference in light intensity between the brightest white and darkest black that can be displayed on an LCD monitor. (False)
  6. An HDMI (High-Definition Media Interface) port combines S-video with high-definition (HD) television and video. (False)
  7. With game consoles, the output device often is a television. (True)
  8. A printout in landscape orientation is taller than it is wide. (False)
  9. With Bluetooth printing, a computer or other device transmits output to a printer via infrared light waves. (False)
  10. An all-in-one device is a single device that looks like a printer or a copy machine but provides the functionality of a printer, scanner, copy machine, and perhaps a fax machine. (True)
  11. An impact printer forms characters and graphics on a piece of paper without actually striking the paper. (False)
  12. A headset is a device that functions as both headphones and a Web cam. (False)
  13. An LCD projector uses tiny mirrors to reflect light, which produces crisp, bright, colorful images that remain in focus and can be seen clearly even in a well lit room. (False)

Multiple Choice

  1. D. Letters, reports, and e-mail messages
  2. B. OLED
  3. A. DisplayPort
  4. D. Diagonal
  5. D. Dots per inch (dpi)
  6. B. If the multifunction peripheral breaks down, all functions are lost
  7. C. Interactive whiteboard
  8. D. Force feedback

Matching

  1. Display device, b. component of a computer that produces music, speech, or other sounds, such as beeps
  2. LCD monitor, g. a display in a helmet, goggles, or glasses
  3. Head-mounted display (HMD), d. an output device that visually conveys text, graphics, and video information
  4. Nit, j. provides the user with a physical response from a device
  5. Candela, e. forms characters and graphics on a piece of paper without actually striking the paper
  6. Aspect ratio, a. printed information that exists physically and is a more permanent form of output
  7. Hard copy, h. unit of visible light intensity equal to one candela per square meter
  8. Nonimpact printer, f. standard unit of luminous intensity
  9. Audio output device, i. provides the user with a physical response from a device
  10. Tactile output, c. defines a display’s width relative to its height

Short Answer

  1. – How does resolution affect images displayed on a monitor?Resolution affect images displayed on a monitor by having a higher resolution, it uses a greater number of pixels and thus provides a smoother, sharper, and clearer image. As you increase the resolution, however, some items on the screen appear smaller.
    How does resolution relate to the size of an LCD monitor or screen?
    Resolution relate to the size of an LCD monitor or screen because resolution is the number of horizontal and vertical pixels in a display device. For example, a monitor that has a 1440 X 900 resolution displays up to 1440 pixels per horizontal row and 900 pixels per vertical row, for a total of 1,296,000 pixels to create a screen image.
  2. Describe some of the features of HDTV.
    Some of the features of HDTV are it works with digital broadcast signals, transmitting digital sound, supporting wide screens, and providing resolutions up to 1920 X 1080 pixels.
    – How do game console users set up the output for the consoles?
    Game console users set up the output for the consoles by plugging one end of a cable in the game console and the other end in the video port on the television.
  3. What are two types of wireless printing technology?
    The two types of wireless printing technology are Bluetooth printing and infrared printing.
    – How do they differ in how they communicate with a computer or other device?
    With Bluetooth printing, a computer or other device transmits output to a printer via radio waves. The computer or other device and the printer do not have to be aligned with each other; rather, they need to be within an approx i mate 30-foot range. With infrared printing, a printer communicates with a computer or other device using infrared light waves. To print from a smart phone, for example, a user lines up the IrDA port on the smart phone with the IrDA port on the printer.
  4. How does an ink-jet printer work?
    An ink-jet printer works by forming characters and graphics by spraying tiny drops of liquid ink onto a piece of paper.
    What are the differences between dye-sublimation printers used by professionals as compared to home or small business users?
    Professional applications requiring high image quality, such as photography studios, medical labs, and security identification systems, use dye-sublimation printers. These high-end printers cost thousands of dollars and print images in a wide range of sizes. Most dye-sublimation printers for the home or small business user, by contrast, typically print images in only one or two sizes and are much slower than their professional counterparts. These lower-end dye-sublimation printers are comparable in cost to a photoprinter based on ink-jet technology. Some are small enough for the mobile user to carry the printer in a briefcase.
  5. What might be included with a surround sound system for a computer?
    Most surround sound computer speaker systems include one or two center speakers and two or more satellite speakers that are positioned so that sound emits from all directions.
    – What is audio resolution, and what are three examples of audio resolutions?
    Audio resolution is the number of bytes that represent sound in a given time, is stated as a bit rate such as 8-bit, 16-bit, or 24-bit. An 8-bit resolution, the sound quality is similar to an AM radio; 16-bit resolution yields optical disc-quality sound; and 24-bit resolution is used for high-quality digital audio editing.
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