Revision cards for AQA AS INFO2 Systems, Data and Information
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is Data? | Raw, unprocessed facts and figures input into a system
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| Examples of Data | 1. Barcodes scanned into an EPOS system
2. A list of student test scores
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| What is Information? | Data that has been processed to give it meaning
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| Examples of Information | 1. Receipt showing names of products purchased and prices
2. Scores converted to overall grades
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| Characteristics of good quality Information | Accurate, up-to-date, relevant, complete, from a reliable source
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| What is ICT? | The use of technology for the input, processing, storage and transfer of data and the output of information
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| What are the three parts of any system? | Input, process and output
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| What are the six components of an ICT system? | Software, hardware, data, information, people and procedures
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| Five different forms of data | Text, sound, still images, moving images, numbers
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| What is coding? | Shortening data when input (i.e. 3 letter airport code) or allocating a number to a value judgement (rating quality of service on scale of 1 to 5)
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| What are the advantages of coding data? | Saves disk space, reduces data input errors, quicker to input than the full words so saves user time, coding value judgements allows us to compile statistics more easily (but loses accuracy)
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| What is encoding? | The computer converting data input into machine-readable binary form (1 and 0)
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| What is direct data? | Collecting and using data for a specified purpose, e.g. student details to enrol them on a course
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| What is indirect data? | Using data for a different purpose from that it was collected for, e.g. using student details to send them marketing materials about other courses
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| What is an ICT system? | Where the output from the system goes directly to a human being or into another ICT system.
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