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ICT > 1. Digital Devices > Flashcards

1. Digital Devices Flashcards

1
Q

What are mainframe computers?

A

A large, powerful computer that can do a lot of complicated jobs quickly and can be used by a lot of people at the same time.

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2
Q

What are some examples of purposes of mainframe computers in large organizations?

A

complex processing tasks like:
1. statistical analysis
2. bulk data processing

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3
Q

What are some places that microprocessors are used in?

A
  1. Washing machines
  2. Televisions
  3. etc. (other household appliances)
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4
Q

What are some advantages of desktops compared to laptops?

A
  1. They have more space for components
  2. They often provide users with the option to upgrade these components or add additional components
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5
Q

Define ‘upgrade’

A

to make a computer better and able to do more things.

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6
Q

What are peripheral devices?

A

equipment that is connected to a computer and used with it.

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7
Q

What are some disadvantages of desktops?

A
  1. They require power to access.
  2. You need peripheral devices for full function
  3. They are not portable
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8
Q

What peripheral devices do laptops usually have?

A

A keyboard, a screen, a track pad and a rechargeable battery.

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9
Q

What are ‘desktop replacements’

A

They are larger laptops with a bigger, better-quality screen with higher performance levels

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10
Q

What are some advantages of laptops?

A
  1. They have a rechargeable battery
  2. They are portable
  3. Doesn’t require power to operate
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11
Q

What are single-board computers?

A

These are affordable computers used in education, embedded computing projects and physical computing projects.

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12
Q

What is embedded computing?

A

Computing hardware that is fixed into position and carries out a specialist task

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13
Q

What is physical computing?

A

interactive systems that can sense and respond to the world around them

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14
Q

What is an example of a single-board computer?

A

The Raspberry Pi Zero

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15
Q

What makes these computers so affordable?

A

The unit itself costs very little and it uses a cheap MicroSD card as its storage

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16
Q

What do mobile phones use to connect to a mobile phone network

A

SIM cards

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17
Q

What does ‘SIM’ card stand for?

A

Subscriber Identity module

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18
Q

What is a SIM card used for?

A

It is used to identify the subscriber to a mobile phone network

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19
Q

What are specialist phones?

A

These are mobile phones that have specialist features to provide users with functions that meet particular user needs.

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20
Q

What is the ‘Alto 2 talking phone’?

A

It is a specialist mobile phone which meets the accessibility needs of blind and partially sighted people

21
Q

What are smartphones?

A

They are small computers with Wi-Fi and mobile phone connectivity to allow them to make phone calls and access the internet

22
Q

Name some characteristics of a smartphone

A
  1. They have some features of other devices like cameras, media players and hand-held game consoles.
  2. Their operating system is more advanced than others.
  3. Applications (apps) can be downloaded.
  4. They have a touchscreen to input information.
23
Q

Why do smartphones need to be recharged more often than others?

A

Since they have so many functions, these phones require a lot of power so the battery life is relatively short.

24
Q

What are some features of tablets?

A
  1. They are bigger than smartphones
  2. They have a touchscreen
  3. They have a virtual keyboard
  4. Applications can be downloaded
  5. You can access Wi-Fi with it
  6. Some have SIM card slots so that they can be online when Wi-Fi signals are not in range?
25
Q

What does Wi-Fi stand for?

A

Wireless Fidelity

26
Q

Define Wireless Fidelity

A

A way of connecting computers or other electronic machines to a network or the internet by using radio signals rather than the wires

27
Q

How do digital cameras and camcorders capture images?

A

They use light sensors to capture images formed by the light passing through the device’s lens

28
Q

What is an advantage of a digital camera?

A

They can film moving images and take pictures

29
Q

What does the quality of the image depend on?

A

It depends on the quality if the lens, the image processor, and the resolution of the sensor.

30
Q

What is the advantage of having a good lens?

A

It allows light to travel through it without introducing any defects and also allows the user to choose how much light can travel through it

31
Q

What is the advantage of having a good image processor?

A

It can compensate for poor lighting conditions

32
Q

What is the advantage of having a good resolution lens?

A

It can capture more detail and produce images with a greater number of pixels

33
Q

What do televisions display?

A

They show still and moving images on a screen.

34
Q

Why do HD TVs have a higher definition than standard TVs?

A

This is because they have a larger number of pixels as their screen resolution

35
Q

Why are some television screens sometimes referred to as 4K or 8K?

A

This is because they have a horizontal resolution of approximately 4000 of 8000 pixels

36
Q

Why are smart televisions special?

A

They can use apps and can download and stream content from the internet

37
Q

How can sound systems play music?

A

They can play music from CDs or from local storage or they can connect to other personal devices using USB or Bluetooth

38
Q

What is a PVR?

A

It stands for personal video recorder. This is a device that records broadcasted content so that it can be watched at a later date.

39
Q

What is a Set-top box (STB)

A

It is a device that sends video and audio received from a broadcaster to a television

40
Q

What do Blu-ray and DVD players connect to television for?

A

To play films and other content that is stored on DVD or Blu-ray disks

41
Q

What is a difference between Blu-ray and DVDs?

A

Blu-rays will usually play DVD disks but DVDs will not play Blu-ray disks.

42
Q

Why can Blu-ray disks store HD movies?

A

Because it has higher-quality picture and sound

43
Q

How are game consoles designed?

A

It is designed a way to enable users to play video games on a television screen.

44
Q

How are games provided?

A

They are provided on disks or as downloads from the internet

45
Q

What devices do games use?

A

They use controllers, which are often wireless, to control the characters, vehicles and/or objects in the game.

46
Q

Why do some consoles use motion sensors?

A

This is to allow the player to control the game with gestures and body movements.

47
Q

What is another gaming console type?

A

Virtual reality controllers and headsets to immerse the player in a realistic gaming experience.

48
Q

What is the version of gaming consoles that provides mobile gaming

A

Hand-held consoles

ICT (2 decks)

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