Basic concepts of hardware Flashcards

1
Q

What is a special case for a computer case called?

A

Mods

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2
Q

What is the function of the motherboard?

A

To connect peripherals and allow parts of the computer to communicate with each other

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3
Q

What is a CPU and what does it do and where does it plug into

A

The Central Processing unit does all the processing, plugged into ZIF socket on motherboard

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4
Q

Why does a CPU need a fan?

A

It gets hot when a computer is on and heat damages the CPU

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5
Q

What brands manufacture CPU’s in computers?

A

Intel and AMD

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6
Q

What brands manufacture CPU’s in tablets/smartphones?

A

Qualcomm, Apple and Arm

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7
Q

What are the characteristics of RAM?

A

Volatile (loses info when no power), its where the CPU keeps instructions its working on, data transfer is quick as its electronic, expensive

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8
Q

What is a DIMM?

A

Dual inline memory module

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9
Q

How does a magnetic HDD work?

A

The drives are solid disks coated with a magnetic substance. They have a read-write head that can write patterns in the form of 0’s and 1’s or can read patterns from the the disk

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10
Q

How are HDD’s becoming more efficient?

A

By improving the density of data on the surface of the disk

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11
Q

What is optical storage?

A

Optical drives use discs that hold data by reflecting laser light in different ways to represent 0’s and 1’s

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12
Q

What are the qualities of a ODD

A

Slower than HDD, limited storage capacity (700mb CD, 4,7-9gb DVD, 50gb Blu-ray)

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13
Q

How does a SSD work?

A

By using electronic memory that retains its data when the power is off.

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14
Q

What are the qualities of a SSD?

A

Expensive, small capacity

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15
Q

What is the function of a peripheral?

A

Gives computer equipment needed to get input and output

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16
Q

How can peripherals be connected?

A

USB, Firewire, VGA, RJ 45 (wired network)

17
Q

What is Firewire?

A

Created when USB wasn’t fast enough to transfer data from camera onto computer. Mostly found on Apple computers

18
Q

What is a modular design?

A

Assembled from variety of parts making maintenance and upgrades easier

19
Q

Why is the average keyboard called a QWERTY keyboard?

A

After the order of the keys in the first row of letters

20
Q

How does a trackpad work?

A

Responds to the electric conductivity of finger and moves pointer

21
Q

How does a scanner work?

A

Light and sensors move from one end to the other capturing the image of item which is converted into a picture by the computer

22
Q

What does OCR (optical character recognition software) do?

A

Takes a picture of a document and converts it into editable text

23
Q

How does a barcode scanner work?

A

By converting barcode image into ID codes

24
Q

What does a biometric scanner do?

A

Reads characteristics of people (fingerprints or iris)

25
Q

What are the types of input data?

A

Text, Images, sound and sensor data

26
Q

List two other methods of capturing text other than with a keyboard

A

Voice recognition and automated batch scanners

27
Q

List two ways data from sensory is used

A

Laptop screen brightness, shutting down devices when temperature becomes too high

28
Q

What are the types of output devices?

A

Monitor, data projectors, printers, speakers/headphones

29
Q

Why are there less varieties of output?

A

The limitations of the human senses

30
Q

List three VDU technologies

A

LED (light emitting diode), LCD (liquid crystal display) and CRT (cathode ray tube)

31
Q

How are monitors classified?

A

Size, resolution, response time, connection, contrast ratio and technology used

32
Q

Why are wide screen monitors useful?

A

Easy to view documents side by side

33
Q

Why is response time important?

A

It is the time it takes to change a pixels colour/value. Therefore a low response time is needed so graphics don’t blur of lag (ghost)

34
Q

What is a contrast ratio?

A

The measurement or ratio of the darkest black to the brightest white. Larger the ratio the better

35
Q

How does a laser printer work?

A

By melting toner onto the paper

36
Q

How does an inkjet printer work?

A

By spraying dots of ink onto paper

37
Q

How do dot-matrix printers work?

A

By striking pins onto paper through inked ribbons