Topic 1

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What is data?
numbers, words, images, sound, video – possible question: name to forms data can take?
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Definition of data?
data consists of raw facts and figures (e.g. Readings from sensors, survey facts, ect.) these raw facts and figures are meaningless because they lack relevance. If you look at data, it is either no use to you or not in a form that you can use
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What does GIGO mean?
(garbage in, garbage out) – means if you enter incorrect data into the computer then the output from the computer will also be incorrect.
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What does evaluating data mean?
date should be evaluated before use. Evaluation checks the date: is fit for purpose, is accurate and is not biased.
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what is encoding and the storage of data?
ossible question give two reasons why data is encoded. Encoding of data. Data is often coded when it is collected on input into an ICT system. The reasons for this are: coded data is quicker to type in, it takes up less storage space on a disk, it is
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Give examples of encoding data?
M and F (gender), GB, D, IR, J, (car number plates) S, M, L, XL (clothing sizes, LHR, GTW, MAN, LPL (airports).
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Advantages of using ICT to store data?
Advantages: less physical storage space is needed, data is easily copied, edited and deleted, easier to backup, easily transferred on networks, fast access to stored data and data can be put into a secret code when stored (encrypted).
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Disadvantages of using ICT to store data?
copying data means copyright holders lose out on money when music, games and videos are copied, data can be copied quickly this means personal data can be stolen, reliance on networks, training needed and general security problems, viruses, hacking a
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Card 2

Front

Definition of data?

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data consists of raw facts and figures (e.g. Readings from sensors, survey facts, ect.) these raw facts and figures are meaningless because they lack relevance. If you look at data, it is either no use to you or not in a form that you can use

Card 3

Front

What does GIGO mean?

Back

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Card 4

Front

What does evaluating data mean?

Back

Preview of the front of card 4

Card 5

Front

what is encoding and the storage of data?

Back

Preview of the front of card 5
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