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35 Cards in this Set
- Front
- Back
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What is data? |
raw facts and figures with out meaning
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What is information?
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data when its given context and meaning
(Information = data+ context + meaning) |
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What is knowledge?
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information that has be given a rule
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What are the main methods of conveying information?
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Text, Pictures, Sound, Videos, Animation and LEDs
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A data type that stores one of two options
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Boolean
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A data type that contains decimal numbers
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Real
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A data type that stores whole numbers
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Interger
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A data type that stores text, numbers and symbols
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String
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A data type that stores data related to date and time
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Date/time
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The main sources of original data
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face to face interviews, observation, data loggers and questionnaires
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Data that can't be updated or changed regularly
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Static data
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Data that can be updated regularly
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Dynamic data
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What is a term used to describe what you get from poor quality data
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Garbage in, garbage out
(GIGO) |
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What are the factors that can affect the quality of information
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Accuracy, relavance, age, completeness, presentation, level of detail
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what is coding of data?
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a method of shortening the data
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What are the 5 reasons to code data?
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Speeds up data entry, increases accuracy of data entry, it is easier to validate, less storage space required, it is faster searching for data
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what is validation?
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this aims to make sure data being entered is sensible, reasonable, complete and within in boundaries
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a type of validation that sets suitable boundaries
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range check
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a type of validation that check the data type
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type check
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a validation type that can check the correct number of digits are entered
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length check
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a validation type that gives the user options to choose from and restricts data entry to those option
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lookup
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a validation type that checks data is entered in the correct format
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format check
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a validation type that makes sure atleast some data has been entered
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presence check
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what is verifaction?
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this checks the data entered against the original source
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the methods of verifaction
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Double entry, checking the data against the original copy and getting someone else to help
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what is backing up?
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copying files onto an extrenal storage device and keeping the files on the original copy on the computer.
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what is archiving?
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making a copy of data or files that are no longer in use onto an extrenal storga device. then removing the original data or files from the computer.
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benefits to archiving
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-permanent record of data or files that are no longer in use
-reduces the amount of data that is stored on the system -frees up space for files that are in use -improves the performance of the system |
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what are the four main costs in producing information?
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hardware, software, consumables and manpower
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what are the two different types of software?
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system and application
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name 3 examples of system software
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operating system, utility and drivers
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name 3 examples of application software
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word packages, graphics packages and web browsers.
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what are the 6 types of interface?
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WIMP, command line, menu, form, dialogue and natural language.
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examples of a menu interface
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classic ipods and atms
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give four advantages of using a computer and projector for a presentation
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presentation can be edited at any time without anyone knowing. |
