Chapter 4 (Module 1)
f
T or F: Each pixel on an LCD display emits visible light in the necessary color.
f
T or F: RFID tags need to be within line of sight of a reader.
table PC
A ____ is a large screen computer either built into a table or designed to be used on a table that allows multi-touch input from multiple users.
barcode
A ____ is an optical code that represents data with bars of varying widths or heights.
optical resolution
Case 4-1 Stacey is the office manager for a small business and is looking for a new printer and scanner for her office. When buying a scanner, Stacey needs to make sure that the scanner has a high enough ____, usually measured in the number of dots per inch (dpi), for the business needs of the office.
dots per inch (dpi)
In a printer, the number of ____ affects the quality of printed output.
resolution
In a printer, the print ____ affects the quality of the printed output.
backlighting
LCD panels used with computer monitors typically include a light, usually at the rear of the display device—a technique referred to as ____ .
megapixels
One factor affecting digital camera quality is the number of pixels, measured in ____, used to store the data for each image.
QR
One of the most common 2D barcodes, the ____ code represents data with a matrix of small squares.
OLED
Plasma displays use a layered technology like LCD and ____ and look similar to LCD displays.
pages per minute (ppm)
Print speed is typically measured in ____.
holograms
Some 3D projectors are designed to project ____.
t
T or F: A display device is the most common form of output device.
t
T or F: A graphics tablet is also called a digitizing tablet.
f
T or F: CRT monitors use digital signals to display images, which allows for sharper images.
progressive display
The most common HD format is 1080p, which uses a screen resolution of 1,920 Χ 1,080 and displays screen images one line at a time, called ____.
bit depth
The number of bits used to store color information about each pixel is called ____.
commands
Touch screens allow the user to touch the screen with his or her finger to select ____ or otherwise provide input to the device associated with the touch screen.
portable barcode readers
____ are particularly useful for individuals who need to scan barcodes while on the go.
laser printers
____ are the standard for business documents and come in both personal and network versions.
pixel
A ____ is the smallest colorable area on a display device.
mouse
A ____ typically rests on the desk or other flat surface close to the user's computer, and it is moved across the surface with the user's hand in the appropriate direction to point to and select objects on the screen.
data projector
A(n) ____ is used to display output from a computer to a wall or projection screen.
dot matrix printer
A(n) ____ uses a printhead consisting of pins that strike an inked ribbon to transfer the ink to the paper.
liquid crystal display (LCD)
A(n) ____ uses charged liquid crystals located between two sheets of clear material to light up the appropriate pixels to form the image on the screen.
speaker
Case 4-2 Lisa is a student who regularly uses the computers at her local Internet café to listen to music, talk to her friends and family through the Internet, and play computer games. Lisa needs to make sure that the computer that she is using has a ____ attached to it for her to be able to hear music and the sounds of a computer game.Case 4-2 Lisa is a student who regularly uses the computers at her local Internet café to listen to music, talk to her friends and family through the Internet, and play computer games.
headphones
Case 4-2 Lisa is a student who regularly uses the computers at her local Internet café to listen to music, talk to her friends and family through the Internet, and play computer games. The Internet café has recently enacted a new policy that says that all users must use the ____ attached to their computers when carrying out activities on the computer that will provide sound, so as to not disturb the other users.
flash memory
Digital still cameras most often use ____ cards for storage.
t
T or F: Computer speakers are the most common type of audio output device. _________________________
t
T or F: Digital video cameras include digital camcorders and small digital video cameras used in conjunction with computers and other devices.
t
T or F: Graphics tablets are often used in conjunction with image editing software to create original images or to modify digital photographs. _________________________
f
T or F: Joysticks are headphones with a built-in microphone. _________________________
t
T or F: Notebook and netbook computers usually have a keyboard that is similar to a desktop keyboard, but it is typically smaller.
f
T or F: One-dimension (1D) barcodes contain data only vertically.
f
T or F: Optical character recognition (OCR) is a technology used primarily by the banking industry to facilitate check processing.
f
T or F: Portable barcode readers are always used in point-of-sale (POS) systems.
f
T or F: Printers produce soft copy.
f
T or F: Scanners produce images through either impact or nonimpact technologies. _________________________
t
T or F: Speech recognition systems enable the device being used to recognize voice input as spoken words. _________________________
t
T or F: TOLED displays are transparent. _________________________
t
T or F: The graphics tablet is typically connected to a computer via a USB port.
f
T or F: The number of digital photos that can be stored in a camera at one time depends only on the capacity of the card being used.
t
T or F: The term phosphorescence refers to a process that results in much more conversion of electrical energy into light instead of heat. _________________________
t
T or F: The video card or the integrated graphics component determines the graphics capabilities of the computer. _________________________
function
____ keys on a keyboard are used for issuing commands in some programs.
