Unit 1 - Information and Systems Flashcards
What is information?
Information is data that has been processed or given meaning.
What is data?
Data is the raw facts and figures before they have been processed or given meaning
What’s the information word equation?
Information = Data + Structure + Context + Meaning
What is structure in terms of data?
How the data is represented.
What is meant by context when talking about data?
The environment that the data is used in.
What is knowledge?
Application of information!
Name the 5 ways information can be represented?
Text, Graphics, Sound, Moving Pictures, LightEmitting diode (LED)
What’s the advantages of representing data using TEXT?
Clear to understand
Lots of detail
What’s the disadvantages of using text to represent information?
User must be able to read and understand the language
Lots of text cannot be read quickly
What are the advantages of using Graphics to represent information?
Multilingual
Can match what you see-physical shapes
What are the disadvantages of using Graphics to represent information?
Can be confusing if the symbol isn’t clear
Some symbols mean different things in other countries
What are the advantages of using sound to represent information?
No fixed position
No sight needed
What are the disadvantages of using sound to represent information?
Sounds can be misheard
Normally language based
What are the advantages of using moving pictures to represent information?
Lots of information can be shown
Not language dependant
What are the disadvantages of using moving pictures to represent information?
Linear- if you don’t see the beginning you may not understand
Problems might occur if sound is attached
What are the advantages of using LEDs to represent information?
Can allow data to be secure
Can be used in noisy places
What are the disadvantages of using LEDs to represent information?
Need sight to see the light
Combinations of lights may need to be known to be understood
Name the 5 data types?
Boolean, Real, Integer, Text/Sting, Date/Time
Give 1 example of when the data type Boolean is used?
Male or Female
Yes or No
Lower or Upper