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CAT > Input And Output > Flashcards

Input And Output Flashcards

1
Q

What makes up digital images?

A

Pixels

Pixels are the small dots you see when zooming in on an image.

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2
Q

What does a higher number of pixels indicate?

A

Higher image quality

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3
Q

What is the function of a scanner?

A

Scans images into a digital format for use on a computer

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4
Q

What types of items can be scanned by a scanner?

A
  • Bar codes
  • Photographs
  • Documents
  • 3D objects
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5
Q

What does DPI stand for in scanning?

A

Dots per inch

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6
Q

What is the relationship between DPI and image quality?

A

Greater DPI = more pixels = higher quality image

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7
Q

What is the best quality colour depth available?

A

24 bit colour (about 16.7 million colours)

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8
Q

Name one advantage of scanners.

A

Scanned documents are stored digitally & don’t take up physical space

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9
Q

What is a disadvantage of scanners?

A

Scanning can be slow

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10
Q

What is a point-and-shoot camera?

A

A compact camera designed for quick use and limited technical expertise

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11
Q

What is a DSLR camera designed for?

A

Professional use where the lens needs to be changed

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12
Q

What is the advantage of a larger sensor in a camera?

A

Better quality images, even with the same number of megapixels

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13
Q

What is the difference between optical and digital zoom?

A

Optical zoom uses the camera lens; digital zoom enlarges the image but reduces quality

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14
Q

What does ISO rating indicate?

A

How sensitive your camera is to light

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15
Q

What is the main advantage of biometric input?

A

Security

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16
Q

Name one disadvantage of biometric input.

A

Expensive to implement, maintain and use

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17
Q

How do ATMs receive input?

A
  • Card reader slot
  • Numeric keypad & menu buttons
  • Modem/Network connection
  • Touchscreen
  • Money counter sensor
  • Money deposit slot
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18
Q

What is one advantage of using ATMs?

A

Allows for banking transactions at any time of day or night

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19
Q

What is a disadvantage of using ATMs?

A

It can be dangerous to use an ATM

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20
Q

What technology do Point of Sale systems use to recognize products?

A

Barcodes & RFID tags

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21
Q

What is an advantage of using barcodes in POS systems?

A

Much faster than typing in prices on a keyboard

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22
Q

What is a touch screen?

A

A combination of an LCD and a thin ‘touch sensing’ film

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23
Q

What is one advantage of touch screens?

A

Intuitive to use – very little training needed

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24
Q

What is a disadvantage of touch screens?

A

Typing on an on-screen keyboard is not as fast or easy as a real keyboard

25
Q

What are data collection devices used for?

A

Capturing data using sensors, switches, cameras, microphones, etc.

26
Q

What is an advantage of data collection devices?

A

Data is captured automatically using sensors

27
Q

What is one limitation of data collection devices?

A

Sensors can fail without the problem being detected

28
Q

What types of input do smartphones and tablets have?

A
  • Touch screen
  • Physical buttons
  • Camera/video camera
  • Accelerometer/gyroscope
  • Microphone
29
Q

What is the purpose of output in computing devices?

A
  • Provide user feedback
  • Provide permanent copies of results
  • Allow data transmission between devices
30
Q

What are the types of output?

A
  • Visual
  • Sound
  • Touch
  • Other
31
Q

What is the advantage of display devices?

A

Provide immediate feedback to the user

32
Q

What is a disadvantage of display devices?

A

Output is not permanent

33
Q

What does resolution refer to in display devices?

A

The number of horizontal and vertical pixels that a screen can display

34
Q

What is the contrast ratio?

A

The difference between the darkest black and the whitest white the display can produce

35
Q

What is aspect ratio?

A

Relationship between width and height of the screen

36
Q

What does response time measure?

A

How quickly the monitor updates its pixels

37
Q

What do lumens describe in projectors?

A

The brightness of the image projected

38
Q

What connection types do monitors typically use?

A
  • VGA
  • DVI
  • HDMI
  • DisplayPort
39
Q

What is an interactive whiteboard?

A

Input & output device that displays contents of a connected computer’s screen

40
Q

What is one advantage of interactive whiteboards?

A

Better interaction and participation to enhance the process of teaching and learning

41
Q

What is a disadvantage of interactive whiteboards?

A

Only one person can use it at a time

42
Q

What are the two main types of printers?

A
  • Laser Printers
  • Inkjet Printers
43
Q

What is the print speed measured in?

A

Pages per minute (ppm)

44
Q

What does monthly duty cycle indicate?

A

The maximum number of pages that can be printed in a month without breaking down

45
Q

How do colour printers create black ink?

A

Combine Cyan, Magenta, and Yellow inks

46
Q

What is one common connection type for printers?

A

USB port

47
Q

What does Plug and Play refer to?

A

Method of rules for how a device identifies itself to the computer when connected

48
Q

What technology does WiFi use to connect to networks?

A

Radio waves

WiFi eliminates the need for physical cables.

49
Q

List three examples of wireless technology applications.

A
  • Wireless printing
  • Wireless sound (Bluetooth headsets, speakers, subwoofers)
  • Wireless video & images
50
Q

What is the purpose of Plug and Play technology?

A

To set rules for how a device identifies itself to a computer upon connection

It simplifies the process of adding new hardware.

51
Q

What happens if a computer does not have the software for a newly connected device?

A

It will ask you to install the required software

This usually occurs only the first time the device is connected.

52
Q

What is a driver?

A

The software that controls a device

Drivers translate operating system instructions into signals for hardware.

53
Q

What is the function of a driver in relation to an operating system?

A

It translates instructions from the OS into electrical signals for the device

For example, printing a document.

54
Q

Name two devices designed for visually impaired users.

A
  • Braille keyboard
  • Screen narrator/text-to-speech software
55
Q

What type of device can provide notifications for hearing impaired users?

A

On-screen notices or flashing screens instead of sound

These devices help convey information visually.

56
Q

Which devices assist individuals lacking motor control?

A
  • Eye tracking devices
  • Head movement devices
  • Large key keyboards
  • Large trackballs
  • Joysticks
  • Foot pedal control devices
  • Sip and puff devices
57
Q

What is one recommendation for maintaining health while using input and output devices?

A

Do not sit for hours on end

Frequent breaks and movement can prevent strain.

58
Q

True or False: Using headphones to block out surrounding sound can be damaging to your hearing.

A

True

It often leads to increased volume levels that can harm hearing.

59
Q

What should you do to avoid eye strain when using a monitor?

A

Change the monitor settings and position it to avoid glaring reflections

Proper setup can significantly reduce eye discomfort.

CAT (3 decks)

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