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CAT (jiya) > Input And Output > Flashcards

Input And Output Flashcards

1
Q

What is input in computing?

A

Input can either provide programs with instructions on what to do next or be the data that must be processed.

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2
Q

What makes up digital images?

A

Pixels make up digital images.

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3
Q

How does the number of pixels affect image quality?

A

More pixels means higher image quality.

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4
Q

What is a scanner?

A

An input device that scans images into a digital format for use on a computer.

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5
Q

What types of items can be scanned with a scanner?

A
  • Bar codes
  • Photographs
  • Documents
  • 3D objects
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6
Q

What does DPI stand for?

A

Dots per inch.

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7
Q

What is the relationship between DPI and image quality?

A

Greater DPI = more pixels = higher quality image.

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8
Q

What is colour depth?

A

The number of different colours that can be represented by a pixel.

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9
Q

What is the best quality colour depth available?

A

24 bit colour (about 16.7 million colours).

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10
Q

List some advantages of scanners.

A
  • Large documents can be scanned into a single digital file.
  • Scanned documents are stored digitally.
  • Scanned copies can be emailed directly.
  • Old documents can be stored for future generations.
  • Old family photos can be shared digitally.
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11
Q

What are some disadvantages of scanners?

A
  • Scanning can be slow.
  • Quality depends on the original hardcopy.
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12
Q

What are digital cameras?

A

Devices such as smartphone cameras, digital compact cameras, and high-end DSLR cameras.

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13
Q

What is the difference between point-and-shoot and DSLR cameras?

A
  • Point-and-shoot: compact, does not allow lens changes.
  • DSLR: designed for professional use, allows lens changes.
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14
Q

How does optical zoom differ from digital zoom?

A

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

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15
Q

What does ISO rating indicate?

A

How sensitive the camera is to light.

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16
Q

What is a biometric input?

A

Measures unique biological features of a person.

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17
Q

What is a key advantage of biometric input?

A

Security.

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18
Q

What are some ways ATMs receive input?

A
  • Card reader slot
  • Numeric keypad & menu buttons
  • Modem/Network connection
  • Touchscreen
  • Money counter sensor
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19
Q

List some advantages of using ATMs.

A
  • Allows banking transactions anytime.
  • Not limited to own bank or country.
20
Q

What are barcodes and RFID used for?

A

To automatically recognize a product or item.

21
Q

What is the purpose of output in computing?

A
  • Provide user feedback
  • Provide permanent copies
  • Allow data transmission
22
Q

What types of output exist?

A
  • Visual
  • Sound
  • Touch
  • Other electrical signals
23
Q

What are some advantages of display devices?

A
  • Immediate feedback
  • Interaction with the computer
  • Easily changed content
24
Q

What is resolution in display devices?

A

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

25
Q

What does contrast ratio measure?

A

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

26
Q

What is an interactive whiteboard?

A

An input & output device that displays the contents of a connected computer’s screen.

27
Q

What are some advantages of interactive whiteboards?

A
  • Better interaction and participation
  • Annotations can be saved
  • Multimedia presentation
28
Q

What are laser printers known for?

A
  • More reliable
  • Easier to maintain
  • Better for black and white printing
29
Q

What is the print speed measured in?

A

Pages per minute (ppm).

30
Q

What is generally cheaper to run for higher volumes of printing?

A

Laser printers

Laser printers are often more economical for high-volume printing compared to inkjet printers.

31
Q

Which type of printer is better for high-quality photo prints?

A

Inkjet printers

Inkjet printers are designed to deliver superior quality for photo printing.

32
Q

What can happen to ink cartridges over time?

A

They can dry out

Ink cartridges may become unusable if left for extended periods without use.

33
Q

How is print speed measured?

A

Pages per minute (ppm)

Print speed is typically indicated for text pages, while images may reduce speed.

34
Q

True or False: Laser printers are generally slower than inkjet printers.

A

False

Laser printers are usually faster than inkjet printers.

35
Q

What does DPI stand for in printing resolution?

A

Dots per inch

DPI is a measure of printing resolution, indicating the density of dots in a printed image.

36
Q

What does a higher DPI indicate?

A

Better quality printout

Higher DPI values lead to more detailed and clearer printouts.

37
Q

What is the monthly duty cycle of a personal printer typically under?

A

5000 pages

This indicates the robustness and expected usage of personal printers.

38
Q

What colours do cheap printers typically use to create black?

A

Cyan, Magenta, Yellow

These three colours are combined rather than using a true black ink.

39
Q

What is duplex printing?

A

Printing on both sides of the paper automatically

Duplex printing enhances paper usage efficiency.

40
Q

What are common connection methods for printers?

A

USB port, wireless connection, media card slots

These methods facilitate different ways to send print jobs to the printer.

41
Q

What technology does WiFi utilize for network connections?

A

Radio waves

WiFi provides a wireless alternative to physical cables for networking.

42
Q

What is the purpose of a driver in computing?

A

To control the device

The driver translates instructions from the operating system into signals for the hardware.

43
Q

What devices assist visually impaired users?

A
  • Braille keyboard
  • Braille display
  • Speech recognition software
  • Magnification devices
  • Large-key keyboards
  • Braille printers

These devices enhance accessibility for users with visual impairments.

44
Q

What aids are available for hearing impaired users?

A
  • On screen notices
  • Flashing screens
  • Vibration devices

These devices provide visual or tactile feedback instead of sound.

45
Q

What should users lacking motor control consider using?

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

These assistive devices cater to various levels of motor control issues.

46
Q

What advice is given to prevent health issues related to computer use?

A
  • Do not sit for hours on end
  • Learn keyboard shortcuts
  • Perform exercises for affected joints
  • Avoid loud headphones
  • Adjust monitor settings

These practices help alleviate physical strain and discomfort.

CAT (jiya) (10 decks)

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