Section 3 Flashcards
What is data?
Raw facts and figures before they’ve been processed.
It’s not possible to understand what they mean.
Examples: 23, 6, 7, 8
What is information?
Information is created when data is processed.
Information is data with meaning.
It has been processed by a computer and is normally part of a sentence.
Example: 34 minutes. It takes me 34 minutes for me to walk to school.
What is the Information equation?
INFORMATION = data + [structure] + [context] + meaning
What is knowledge?
Knowledge makes use of information by applying rules to it, so that it can be used in a meaningful way. It means you can understand what to do with the information, make predictions and judgements.
Example: John ran the race in 15 seconds, this was the fastest time and therefore he was the winner.
Give 4 characteristics of data
Clarity
Accessible
Consistent
Complete
Accurate
Timely
Relevant
Cost
What is encoding data?
When data is changed into a code in order to standardise it so that it meets its purpose and is organised
Give an advantage of encoding data
Saves computer memory
Faster to input data
Less likely to lead to errors when entering data
More secure
What happens if you don’t label a file correctly?
File may become corrupt and fail to open
Give two of data capture forms
Sensible number of boxes
Sun headings
Clear instructions given
Define VALIDATION
The use of a computer software to check what is entered is reasonable
Define VERIFICATION
Checking data you have entered against the original source, ensuring it’s accuracy
Give three validation checks
Type check
Range check
Presence check
Format check
Length check
Look-up list
Give a benefit of a look-up list
Speeds up data entry
Improved accuracy
Give three ways of verification
Entering data twice
Proof reading
CAPTCHA CODE
1 drawback of entering data twice as verification
Not suitable for large amounts of data
