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ICT > 1. Digital Devices > Flashcards

1. Digital Devices Flashcards

(48 cards)

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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’?

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A

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

21
Q

What are smartphones?

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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

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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?

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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?

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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
What does Wi-Fi stand for?
Wireless Fidelity
26
Define Wireless Fidelity
A way of connecting computers or other electronic machines to a network or the internet by using radio signals rather than the wires
27
How do digital cameras and camcorders capture images?
They use light sensors to capture images formed by the light passing through the device's lens
28
What is an advantage of a digital camera?
They can film moving images and take pictures
29
What does the quality of the image depend on?
It depends on the quality if the lens, the image processor, and the resolution of the sensor.
30
What is the advantage of having a good lens?
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
What is the advantage of having a good image processor?
It can compensate for poor lighting conditions
32
What is the advantage of having a good resolution lens?
It can capture more detail and produce images with a greater number of pixels
33
What do televisions display?
They show still and moving images on a screen.
34
Why do HD TVs have a higher definition than standard TVs?
This is because they have a larger number of pixels as their screen resolution
35
Why are some television screens sometimes referred to as 4K or 8K?
This is because they have a horizontal resolution of approximately 4000 of 8000 pixels
36
Why are smart televisions special?
They can use apps and can download and stream content from the internet
37
How can sound systems play music?
They can play music from CDs or from local storage or they can connect to other personal devices using USB or Bluetooth
38
What is a PVR?
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
What is a Set-top box (STB)
It is a device that sends video and audio received from a broadcaster to a television
40
What do Blu-ray and DVD players connect to television for?
To play films and other content that is stored on DVD or Blu-ray disks
41
What is a difference between Blu-ray and DVDs?
Blu-rays will usually play DVD disks but DVDs will not play Blu-ray disks.
42
Why can Blu-ray disks store HD movies?
Because it has higher-quality picture and sound
43
How are game consoles designed?
It is designed a way to enable users to play video games on a television screen.
44
How are games provided?
They are provided on disks or as downloads from the internet
45
What devices do games use?
They use controllers, which are often wireless, to control the characters, vehicles and/or objects in the game.
46
Why do some consoles use motion sensors?
This is to allow the player to control the game with gestures and body movements.
47
What is another gaming console type?
Virtual reality controllers and headsets to immerse the player in a realistic gaming experience.
48
What is the version of gaming consoles that provides mobile gaming
Hand-held consoles

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