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ICT mock study pt2 > Detective Devices and Media > Flashcards

Detective Devices and Media Flashcards

1
Q

what does storing data mean?

A

it means putting the data in a known place

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2
Q

what is a main memory?

A

is where data is stored temporarily

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3
Q

what is another way for saying main memory?

A

RAM and ROM

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4
Q

what is backing storage?

A

the name for all the data storage devices. It stores data for a long time

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5
Q

what does volatile mean?

A

storing data for a short time

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6
Q

what does non-volatile mean?

A

storing data for a long

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7
Q

what is the name for the device that actually holds data?

A

storage medium

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8
Q

what is the name of the device that saves data onto the storage medium?

A

storage device

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9
Q

give an example of the storage medium being

a fixed past of the storage device

A

the magnetic coated discs built into a hard drive

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10
Q

give an example of the storage medium being removable from the device

A

CD-ROM can be taken out of a CD drive

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11
Q

what is the name that refers to a collection of data stored in a computer system

A

file

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12
Q

what are files organised into?

A

folders

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13
Q

what is a serial (or sequential) access storage device?

A

it is one that stores files one-by-one in a sequence

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14
Q

what is a non-computer serial access device that will be familiar to you?

A

VHS videotape

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15
Q

why is a VHS videotape a serial access device?

A

because video is stored on a long piece of tape, when TV shows are recorded onto the tape, they go on one-by-one, in order…

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16
Q

what is a direct (or random) access storage device?

A

it is one that stores files so that they can be instantly accessed. There is no need to search over through other files to get to the one you want

17
Q

what is an example of direct access device that you are familiar with?

A

a DVD. you can jump to any scene on a DVD

18
Q

what is a thousand bytes (B) known as?

A

1,000B = 1kB (kilobytes)

19
Q

what is a million bytes (B) known as?

A

1,000,000B = 1MB (megabyte)

20
Q

what is a thousand million bytes (B) known as?

A

1,000,000,000B = 1GB (gigabyte)

21
Q

what is a million million bytes (B) known as?

A

1,000,000,000,000B = 1 TB (terabyte)

22
Q

the more GB (gigabytes) the more what?

A

the more data capacity

23
Q

list some storage media devices from least to most data capacity

A 
floppy disc (1.44MB)
zip disc
CD-ROM
jaz drive 
DVD
USB memory stick 
backup tape
hard drive (1,000,000MB)
24
Q

how do magnetic storage media and devices store data?

A

in the form of tiny magnetised dots

25
Q

how are magnetised dots created, read and erased?

A

using magnetic fields created by very tiny electromagnets

26
Q

how are the magnetised dots arranged in case of a magnetic tape?

A

the dots are arranged along the length of a long plastic strip which has been coated with a magnetisable layer

27
Q

how are the magnetised dots arranged in case of magnetic discs?

A

the dots are arranged in circles on the surface of a plastic metal or glass disc that has a magnetisable coating

28
Q

how is the storage capacity for hard drives?

A

it has a very large storage capacity (up to 1TB). They can be used to store vast amounts of data

29
Q

what type of device are hard drives?

A

random access devices

30
Q

what is the name for a hard-drive built into the case of a computer?

A

fixed hard drive. Almost every computer has a fixed hard drive

31
Q

a fixed hard drive act as what?

A

it acts as the main backing storage device for almost all computers since they provide almost instant access to files

32
Q

what is a portable hard-drive

A

it is one that is placed into a small case along with some electronics that allow the hard-drive to be accessed using a USB or similar connection

33
Q

how much data do portable hard-drives allow to be transported?

A

it allows large amounts of data to be transported from computer to computer

34
Q

when are magnetic tapes used?

A

when large amounts of data need to be stored, but where quick access to individual files is not required. A typical use is for data back-up

35
Q

remember the website:

A

https://www.igcseict.info/theory/3/optic/index.html

ICT mock study pt2 (3 decks)

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