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GCSE Revision Flashcards > Computer Science - Memory and Storage Part 1 > Flashcards

Computer Science - Memory and Storage Part 1 Flashcards

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1
Q

What does RAM stand for?

A

Random Access Memory

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2
Q

What is RAM?

A

The main memory in a computer, which can be read and written to

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3
Q

Is RAM volatile or non-volatile?

A

Volatile

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4
Q

What does RAM store?

A

Data, files and programs currently in use

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5
Q

What does ROM stand for?

A

Read Only Memory

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6
Q

Is ROM volatile or non-volatile?

A

Non-volatile

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7
Q

What does ROM come on?

A

A small factory-made chip built into the motherboard

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8
Q

What does ROM store?

A

The instructions needed to boot (BIOS)

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9
Q

What is volatile memory?

A

Temporary memory which requires power to retain its data

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10
Q

What is non-volatile memory?

A

Permanent memory which keeps data even when the power is off

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11
Q

When is virtual memory created?

A

When RAM is full/running slowly

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12
Q

How is virtual memory created?

A

The operating system moves data from RAM to a location on secondary storage (virtual memory). The data can be swapped back to RAM if needed

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13
Q

What is primary storage?

A

Memory which is directly accessed by the CPU

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14
Q

Give 4 examples of primary storage:

A

ROM, RAM, Cache, Registers

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15
Q

Is secondary storage volatile or non-volatile?

A

Non-volatile

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16
Q

What does secondary storage store?

A

Data which is not in use (operating systems, applications, user files)

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17
Q

What does SSD stand for?

A

Solid State Drive

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18
Q

What are solid state storage devices?

A

Storage devices with no moving parts

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19
Q

Do SSDs have fast/slow read/write speeds?

A

Fast

20
Q

What are solid state storage devices?

A

Storage devices with no moving parts

21
Q

Give 2 examples of Solid State storage:

A

Any 2 from:
SD card
USB stick
SSD internal/external drive

22
Q

Give 2 examples of optical storage:

A

Any 2 from:
CD, DVD, Blu-Ray

23
Q

Advantages of optical storage?

A

Very portable, cheap per GB

24
Q

Give 2 examples of magnetic storage:

A

Any 2 from:
Hard drives, magnetic tape, Floppy disk drive

25
Q

Advantages of magnetic storage?

A

Large storage capacity, low cost per GB

26
Q

What is the capacity of a device?

A

Amount of data that can be stored on a device

27
Q

What is the speed of a device?

A

How quickly can the data be accessed from or written to the media

28
Q

What is the reliability of a device?

A

The shelf-life of the media. How long it will retain data so that it can be accessed reliably and without error in the format it was originally saved

29
Q

What is the portability of a device?

A

How easily it can be moved about. This depends on the size and weight of the media

30
Q

What is the cost of a device?

A

How expensive the media is in terms of cost per GB of storage

31
Q

What is the durability of a device?

A

How resistant the media is to damage - whether it’s rugged enough to survive rocks, scratches, etc.

32
Q

What is a bit?

A

A single binary digit (1 or 0)

33
Q

What is a nibble?

A

4 bits or half a byte

34
Q

What is a byte?

A

8 bits

35
Q

How much can one byte hold?

A

One typed character

36
Q

What is a kilobyte?

A

1000 bytes

37
Q

How much can one kilobyte hold?

A

About 2 pages of text

38
Q

What is a megabyte?

A

1000 kilobytes

39
Q

How much can one megabyte hold?

A

1 minute of mp3 audio

40
Q

How much can two megabytes hold?

A

A high quality digital image

41
Q

What is a gigabyte?

A

1000 megabytes

42
Q

How much can 4-8 GB hold?

A

A DVD movie

43
Q

What is a terabyte?

A

1000 gigabytes

44
Q

How much could 1 terabyte store?

A

250 films or 250000 photos

45
Q

What is a petabyte?

A

1000 terabytes

46
Q

How much can a petabyte store?

A

11000 movies or 4000 photos per day for a lifetime

47
Q

How much storage does YouTube have?

A

400PB

GCSE Revision Flashcards (21 decks)

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