7. Input-Output Devices

Question 1

What allows a user to connect a single keyboard, video display device, and mouse to multiple computers

Answer 1

a keyboard, video, mouse (KVM) switch

Question 2

Which scanner reads data based on the reflection of white spaces between black bars

Answer 2

barcode scanner

Question 3

What is the purpose of a capture card

Answer 3

It allows you to send a video or TV signal to your computer

Question 4

Biometric device

Answer 4

A device that allows access to a computer or device by identifying a person through one of their unique physical characteristics

Question 5

Camcorder

Answer 5

A hand-held device used to record live-action video and audio

Question 6

Digital Camera

Answer 6

A hand-held device that records still images digitally instead of on photographic film

Question 7

Input Device

Answer 7

A device that accepts information from the user and passes it to the computer for processing

Question 8

Joystick

Answer 8

A device that controls the movement of the cursor on the screen

Question 9

KVM switch

Answer 9

Keyboard, Video, Mouse switch

Question 10

Keyboard, Video, Mouse (KVM) switch

Answer 10

A switch that allows a user to use one keyboard, mouse, and display device for multiple computers

Question 11

speaker

Answer 11

a device which convers an electrical audio signal into a corresponding sound

Question 12

Touch Screen

Answer 12

A display device that senses touch on its surface, then translates that touch to user input data

Question 13

Touchpad

Answer 13

An input device where users move their fingers over a touch-sensitive surface to move the pointer around the screen

Question 14

barcode reader

Answer 14

a handheld scanner used to read the group of thick and think lines (called a barcode) printed on various products

Question 15

digitizer

Answer 15

used to convert hand-drawn pictures into digital images that can be manipulated user computer software. You draw on the digitzer’s screen and what you draw is digitally rendered into the computer

Question 16

Signature pad

Answer 16

Used to digitize handwritted signatures, for example, to accept credit card signatures at the point of sale terminals

Question 17

gamepad

Answer 17

a hand-held device used to play video games

Question 18

microphomne

Answer 18

a device used to input audio into a comptuer

Question 19

motion sensor

Answer 19

an electronic senor that detects physical motion in an envrionment.

Question 20

scanner

Answer 20

• captures printed photos and images for editing on a computer

Question 21

scanner types

Answer 21

• hand held
• flatbed
• automatic document feeder (ADF)

Question 22

NFC reader

Answer 22

reads contactless paymet cards of inventory trackign tags using near filed communications technologies

Question 23

webcam

Answer 23

a video camera that transmits live video over the internet

Question 24

Three main computer output devices

Answer 24

• Display
• Printer
• Speakers

Question 25

Important combined I/O devices include

Answer 25

• Audio headsets
• KVM switches
• Set top boxes
• Smart TVs
• touchscreen displays
• MIDI instruments

Question 26

KVMP

Answer 26

Keyboard video mouse, peripheral

Question 27

STB

Answer 27

set top box

Question 28

STU

Answer 28

set top unit

Question 29

set top unit (STU)

Answer 29

alternative name for set top box

Question 30

Set top box

Answer 30

received digital audio and video singals then send those signals to a display (such as TV or computer display)

Question 31

touch screen types

Answer 31

• Resistive
• capactive
• surface acoustic wave

Question 32

resistive touchscreen

Answer 32

• uses two layers, a layer of glass and a conductive and resistive meyal layer with an electical current running between them. When you touch the screen, pressure on the screen makes the layers touch and there is a change in electical current in that spot
• only register touch in one spot at a time
• easiest and cheapest to manufacture
• require frequent calibration
• common in older device, but less frequent in modern devices

Question 33

capactive touchscreen

Answer 33

• dual layer
• the layer with the electical charge is placed directly on the glass panel.
• when you touch the creen, some of the charge is transferred to you, causing a decress in electical charge at that location on the screen.
• the coordinates of the change in charge are sent to the os and the software translates this info into the correct user input
• capactive touchscreens work well with multi-touch
• require little calibration
• dominant modenr touchscreen tech

Question 34

surface acoustic wave technologu

Answer 34

• uses a glass panel with a receiving and sending tranducer mounted along the sides of the panel
• touch the glass panel istrubs the wave allowing the receiving transducer to identify the touch event.
• can use almost any object for input
• best for displaying detailed graphics because it has not metal layer allong for 100% throughput from the display
• doesn’t support multitouch
• more expensive than other touch screen tech