Ict

Ict

chapter 1
1. A
  1. data
    1. data are letters, characters, numbers, symbols, images, lights and sounds before they have been processed by a computer or other processor.
2. B
  1. structure
    1. when data is presented in a particular way, it gains structure.
  2. context
    1. numbers and letters that are presented in a way could still be interpreted in different ways. therefore they need to be put in to context.
  3. meaning
    1. once meaning is added to data, it becomes information which will then be useful.
  4. data + meaning = information
3. C
  1. text
    1. advantage explanations can be given text can be read even if it's noisy
    2. disadvantage language barriers cold be difficult to explain something without an image it could take a long time for a person to process the text.
  2. picture
    1. advantage pictures can be seen and understood without any language barrier and could be seen if noisy
    2. disadvantage images on their own cannot give explanations or Instructions some images can confuse some people with their meaning
  3. LED
    1. advantage takes up very little space cheap to produce and little power needed
    2. disadvantages on their own don't mean anything and so text or images are needed can only be seen if someone is closeup
  4. videos
    1. advantages videos can include both sound and video meaning that explanations can be given can explain exactly how something works
    2. disadvantages requires display screen time consuming to produce difficult to hear in a noisey environment not helpful for blind or deaf people
  5. animation
    1. disadvantage animation doesn't include sound and some information could be missed out
    2. advantages a person could understand specific language
  6. sound
    1. advantages sound can grab people's attraction doesn't need a display can be used for blind people
    2. disadvantages deaf people won't be able to hear it could be difficult to hear in noisy environment
4. D
  1. knowledge is about understanding what information means and being able to apply it to a situation. a cars speedometer may display 45 mph so it tells you the car is traveling at that speed.
5. E
  1. string
    1. a string of data is a set or lists letters symbols characters and or numbers.
  2. integer
    1. first number of the data types integer are whole numbers
  3. real
    1. numbers that include a decimal place
  4. date time
    1. any dates and times can be stored using date and time
  5. boolean
    1. data can only be one or two values these values are true and false or yes and on ...
6. F
  1. direct scoure of data
    1. data has been collected and used for the same purpose for which was collected
  2. indirect scoure of data
    1. data has been collected from an indirect scoure when used for a different purpose it was collected for
7. G
  1. static
    1. static data doesn't change and is permanently there
  2. dynamic
    1. dynamic data can be changed it is stored in an electronic format like the internet
8. H
  1. garbage in = garbage out
  2. the quality of information all depends upon how good the quality of the data is.
  3. accuracy
    1. accurate data must be correct there are validation errors including wrong spelling
  4. relevance
    1. information must be relevant for the purpose it's being used for.
  5. age
    1. data must be up to data for the purpose it's being used for. most data could go out of data very quickly.
  6. completeness
    1. it is important that all the data required is avaliable some data may be accidentally missed out.
  7. presentation
    1. a lot of the information provided can be present, accurate, up to date and relevant. but may be presented in ina bad so is difficult to understand.
  8. level of detail
    1. tell level for detail within the information of relevance and completeness. if the information is too detailed then there will be a lot of irrelevant information however if their is too little detail then there could be too little
9. I
  1. encoding methods
    1. numeral representation that is when words and descriptions are replaced by numbers.
    2. abbreviations this involves explaining words and disruptions with letters that are related to those words
    3. value judgements these are used in questionnaires when a respondent is asked what they think about about a particular thing.
    4. advantage
      1. low storage usage
      2. processing speed increased
      3. data can be kept confidential
    5. disadvantage
      1. accuracy
      2. completeness
      3. interpretation
      4. limited codes
10. J
  1. range check
    1. ensure date is with in the acceptable range
  2. type check
    1. check the data is correct
  3. length check
    1. check the data is within the word length
  4. picture/format check
    1. matches the particular pattern
  5. presence check
    1. checks that data has been entered to a particular field
  6. lookup in list
    1. check the list of data exists
  7. check digit

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