2. Information and dataInformation and data
• Data consist of values stored
inside the computer
It does not mean muchmost of the
time it is stored as coded data
Information added valueis
meaningful to us
Something that can make us do
certain action.
3. Data collection and preparationData collection and preparation
• Data is the main component when
speaking about processing
• Without data no output!!!!!!!!!
• Data that we input has to be
collected
• Not always that data is also in a form
that we can use!
• Data has to be prepared!
4. • Analogue data data that can take
any value such as temperature,
lenght, weight.
• Digital data computers like digital
data it is data that cabe accepted
by computer compouter might only
accept values up to two decimals and
similar.
• Analogue data has to be converted
into digital data prior using it at the
computer.
5. Data input and checkingData input and checking
• When we input data we have to
make sure that no errors have been
made.
• For that purposes we have two types
of checking that should be done on
data input to a system:
• Data verification
• Data validation
6. • Data verificationchecking to make
sure that taht what was input to the
system was meant to be inputed.
• i.e. Typing errors and similar.
you should always double check or
have two people check what has
been keyed.how it is checked
depends on the importance of data
7. • Data validation making sure that
the right sort of data has been input.
• Computer does this by following set
of rules.
• It depends from your needs and
software used
8. File organisation andFile organisation and
techniquestechniques
• File full set of data
• File is to large and sometimes to
comlex to find certain data
• So it is split into smaller portions
calledrecords
• Record consist out of few smaller
parts stored in a space and is called
field
• Each record is uniqely identified
key field