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- 1Define the term dataData is raw facts and figures that do not have any meaning
Data can be alphanumeric, sounds, graphics or videos
Data has not been processed - 2Define the term informationInformation is data that has been processed
processed by the computer
processed can mean having calculations performed on the data or organising the data in some way - 3Define the term knowledgeknowledge is obtained by information by applying rules to it
knowledge is the application of information to a situation
e.g. if a sandwich's sell by date was 3rd of September I know that if I were to eat it then I would most likely become ill - 4state the formula to define informationdata + context + meaning = information
- 5give three examples of dataalphanumeric
sounds
graphics
videos - 6in the context of a super market give an example of: data information knowledgedata: 3A 4B 6P
information: the numbers stand for how many there are of each letter the letters are encoded, so A stands for apple B for banana and P for pear.
Knowledge: the supermarket have to sell 7 of each fruit so I they have to sell four more apples 3 bananas and 1 pear. - 7state 4 factors which make good quality datafit for purpose
valid
up to date
unbiased
accurate - 8explain the meaning of GIGOGIGO stands for garbage in garbage which means that if you type the wrong data in you'll end up with wrong processed data in the end
- 9explain what encoding is and give a suitable exampleencoding is where you assign codes to data reducing its size
e.g. the size of clothes
S = small
M = medium
L = large - 10describe two reasons why data is encodedencoded data takes up less storage space
encoded data is quicker to input into a computer
encoded data is easier to send over a network - 11explain two consequences down of processing inaccurate datacould lead to a loss in trust and good will in a company
wasting time sorting out the mistakes
prosecuted under the data protection act 1998 for not keeping accurate data records - 12give three different types of errors users maketranscription error
transposition error
input error
processing error - 13a persons date of birth has been entered into a database. state and describe two things the validation program could check regarding this date as part of validationrange check: to check that they have put there birth date in between a certain range for example that they haven't put they were born on the 14 month
presence check: to check that the data needed has actually been entered - 14describe what a range check is in terms of data validationa range check is a data validation technique that checks the data being imputed is in a certain range e.g if someone wanted to get a facebook account and they put they were born in 2003 they would not be allowed to have facebook as they are not 13
- 15describe what a presence check is in terms of data validationa presence check is used to check that all data has been entered into the correct field e.g. a username and password
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- Karteikarten am Ohne Titel, erstellt von sefim0012 am 17/09/2014.
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- sefim0012
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