Chapter 4-IT

Question 1

Keyboards

Answer 1

An input device used to enter characters at the location marked by the insertion point or cursor(where the next character will appear)

Question 2

Mice

Answer 2

A mouse is a common pointing device that the user slides to move a pointer around the screen and clicks to make selections

Question 3

Stylus

Answer 3

A pen-like device used to draw or write electronically on the screen

Question 4

Digital forms

Answer 4

With handwriting recognition, written text can be converted to editable typed text

Question 5

Perceptual computing

Answer 5

Users control devices with 3D gestures, voice commands and facial expressions
non-contact system

Question 6

Touch screens

Answer 6

Display devices that are touched with the finger to select commands or otherwise provide input to the computer
Surface Hub-large multi-touch wall-mounted display
Table PC-large computer either built into a table or designed to be used on a table

Question 7

Augmented reality

Answer 7

Overlays computer generated images on top of real-time images

Question 8

Scanners

Answer 8

Is an input device that captures an image of an object in digital form
Flatbed(scan flat objects one page at a time)
Portable(scan objects while on the go)
3D scanners(scan objects in 3D)

Question 9

Scanning quality and resolution

Answer 9

Quality of scanned images indicated by optical resolution
measured in number of dots per inch
Can often be specified when image is scanned
Can be changed when scanned image is edited

Question 10

Barcodes

Answer 10

Are machine-readable optical codes that represent data as a set of bars

Question 11

Types of barcodes

Answer 11

Read by traditional barcode reader
Universal product code(UPC)
ISBN
Code 39
Read by mobile apps
QR codes(2D;hold much more data)
Digital watermarks(icons)

Question 12

Radio Frequency ID(RFID)

Answer 12

Shipping, warehousing
Is a technology that stores, reads and transmits data located in RFID tags
RFID tags contain tiny chips and radio antennas
Can be attached to objects
Read by RFID readers
Tags need to be within range of the reader, rather than in line of sight
Tracking inventory and assets
Electronic toll collection
IDs

Question 13

Near field communications

Answer 13

A short-range wireless communication standard based on RFID
Used to transfer information between smartphones or between a smartphone and an NFC-enabled reader
Used for contact-less mobile payments

Question 14

Optical mark readers

Answer 14

Input data from optical forms to score or tally exams, questionnaires and ballots

Question 15

Optical character recognition

Answer 15

Recognizes text characters and converts them to electronic form as text, not images
Identifies each character and convert it to editable text
Used to process turnaround documents like monthly bills

Question 16

Magnetic ink character recognition(MICR)

Answer 16

Is used primarily for banking to facilitate check processing
MICR readers(check scanners) read the MICR characters printed at the bottom of checks
Used by banks
Used by businesses to remotely deposit checks

Question 17

Audio vs voice input

Answer 17

Audio-the process of entering audio data in to the computer
Voice input-Inputting spoken words and converting them to digital form via microphone or headset

Question 18

Speech recognition

Answer 18

Systems enable the device being used to recognize voice input as spoken words

Question 19

CRT vs flat-panel displays

Answer 19

Cathode ray tube(CRT) displays large, bulky and heavy
Flat-panel displays :take up less desk space ,use less power

Question 20

Screen resolution

Answer 20

The no. pixels used on a display determines its resolution
Affects the amount of information that can be displayed on the screen at one time

Question 21

Video adapters, interfaces and ports

Answer 21

Video cards determine the graphic capabilities of a computer
VGA, DVI,HDMI

Question 22

Flat panel display technologies

Answer 22

Liquid crystal displays(LCDs) uses charged liquid crystals between sheets of glass/plastic
requires backlighting
Organic light emitting diode(OLED) displays use layers of organic material
emit visible light so do not require backlighting
more energy efficient

Question 23

Other types of OLEDs

Answer 23

Flexible OLED-displays built on flexible surfaces such as plastic or metallic foil
Transparent OLED-Displays are transparent, emit light toward top and bottom of display surface
Phosphorescent OLED-Process that results in much more conversion of electrical energy into light instead of heat

Question 24

Wearable holographic displays

Answer 24

Project images on top of what the person wearing the display is already seeing

Question 25

Microsoft HoloLens

Answer 25

Essentially a head-mounted computer
Does not need to connect to a smartphone/computer to function

Question 26

Electronic paper(e-paper) displays

Answer 26

Displays use electronic ink (e-ink)
Used for e-readers and other devices
Easier to read in direct sunlight
Content can change wireless
Only uses power to change images, not maintain an image
Can be monochrome/color

Question 27

Other types of flat panel displays

Answer 27

Interferometric modulator(IMOD) displays
Plasma displays

Question 28

Interferometric modulator displays

Answer 28

Essentially a complex mirror that uses external light to display images
Designed initially for mobile phones and portable devices
Images are bright and clear even in sunlight

Question 29

Plasma displays

Answer 29

Use layers of gas between two plates of glass being replaced by LCDs

Question 30

Data projectors

Answer 30

Display output from a computer to a wall or projection screen
Pico projectors
Keyboard projectors
3D projectors

Question 31

Printer characteristics

Answer 31

Print resolution(measured in dpi)
Print speed(measured in pages per minute or images per minute)

Question 32

Impact printers

Answer 32

Dot-matrix
Print mechanism strikes on inked ribbon to transfer ink to paper
Used to produce multiport forms

Question 33

Non-impact printers

Answer 33

Ink-jet/laser
Use liquid ink/toner
Produce higher quality images
Much quieter than impact printers

Question 34

Multifunction devices(MFDs)

Answer 34

All-in-ones
copy, fax, scan, print

Question 35

Laser printers

Answer 35

Use toner powder and technology similar to that of a photocopier to produce images on paper
Faster and have better quality output than ink-jet printers
Use toner cartridges; toner is transferred to the paper and fused with heat

Question 36

Ink-jet printers

Answer 36

Spray droplets of ink to produces images on paper
Use ink cartridges
Print more slowly
Relatively inexpensive with good quality output

Question 37

Special purpose printers

Answer 37

Barcode printers(print a variety of barcodes)
RFID printers(encode RFID tags)
Label printers(print labels and or postage)
Photo printers
Portable printers

Question 38

Integrated and large format ink-jet printers

Answer 38

Built into smartphones
Large-called plotters, some print on fabric and print up to about 120 inches in width

Question 39

3D printers

Answer 39

Form output in layers to build a 3D version of desired output
Can print using plastic, metal
Called addictive manufacturing
Print customized objects on-demand
Personal products
Medical products
Can contain moving parts