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explain the real time process controlprocess control is a real time system though this is very different to real time transaction processing this
give example of real time transaction processingusing this illustration of booking seats on a flight below sequence of events would occur-
explain in detail about real time transaction processingwhen booking seats on a flight for illustration real time transaction processing would be
what are the advantages of batch processingthis has the advantage which jobs can be processed when computer resources are less busy for example
what is batch processingin this process a number of tasks or jobs are all collected together over a set period of time they are then all loaded into
name the appliances which are controlled by micro-processormany household appliances which are microprocessor-controlled do not have operating
functions carried out by different operating systemsthe below is a list of functions carried out by different operating systems- provides a user
explain in detail about operating systems osoperating system os is a program which after being initially loaded into computer by a boot program
determine the types of sensors different types of sensors are used to give real time information to computers frequently an analogue to digital
digital versatile disk dvdthis is an optical system for storing data its similar to cd though typically can hold 47 gbyte of data compared to only
explain in brief about compact disks cdthese are an optical storage media that have basically taken over from floppy disk software is now generally
explain about the flash memoriesthese are re-writable non-volatile memories evolved from eeprom they are generally connected to the usb port on the
mp4 mpeg-4mpeg-4 files are in a format which can hold a mixture of multimedia objects like video audio animation images etc mp4 players again use
determine in detail about mp3 mpeg-3mpeg-3 uses an audio compression technology it compresses cd-quality sound by a factor of about 10 while
external storage systems a number of different types of external memory devices are available now some of these are considered below hard drives
what is random access memory ramthis is a volatile memory ie contents are lost when computer is switched off a user can write or delete data and read
electrically erasable programmable read only memory eeproman eeprom is a special type of prom which can be erased by exposing it to an electrical
erasable programmable read only memory epromthis is a special type of prom which can be erased by exposing it to ultraviolet uv light once it has
programmable read only memory proma prom is a memory chip on which data can be written only one time once a program has been written onto a prom its
read only memory romrom holds the instructions for starting up the computer this sort of memory can only be read and cant be altered that implies
voice synthesisloud speakers and special software are used to output information in the form of sound to help blind and partially-sighted people it
explain the term- tracker ball and braille printerstracker balleasier to use than a mouse if people have problems using their arms and hands or if
explain about the voice recognition deviceblind and partially-sighted people can communicate with a computer using microphone and software keyboard
explain in detail about touch screensfor people who cant use a keyboard allowing input also helps people with learning difficulties since icons are
explain the types of hardware used in supermarketsthese use many types of specialist io hardware for instance- bar code readersscanners to read