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Modes of processing and data compression (batch processing (payroll system…
Modes of processing and data compression
Real time processing
Air traffic control, concert booking system
Data is processed immediately output is processed quickly
real time processing
you need to know exactly were a plane is at any one time
playing on a console? would it be ok to have lag or delay
essential to avoid disastorious results
processing data immediately
batch processing
payroll system
billing system
data is processed in groups as the data is similiar and inputs the data all at once
these batches can be processed at a conviet time without disruption
data is collected but not sent
data compression
faster transfer of files over the internet
There are two types of data compression
lossy compression
small reduction in image quality
JPEG
removes file data
Losssless compression
no data lost
Winzip
maintains quality
reduces file size for sending
This is when we make a file take up less memory space while still retaining information
why do we need to compress files
Allows faster transfer of files over the internet
Saves mempry space : we have an inreasing amount of storage butfiles are also getting bigger
how it can affect file size
files can become corrupted during the process
files can hide other pieces of data inside them
Files can lose some data lossy