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determine the term- filesfile maintenance is significant updating of files generally involves inserting amending and deleting dataexamplea bank would
difference between visual check and parity checkvisual checkthis is checking for errors by comparing entered data with original document note this is
what is double entry - verificationin this approach data is entered twice using two different people data is only accepted if both versions match up
define the term- verificationit is a way of preventing errors when data is copied from one medium to another for instance from paper to diskcd or
what are the techniques of data collectionit can be either automatic or manual manual techniques can include- keypadskeyboards to type in
optical mark recognition omr omr technology scans a printed form and reads pre-defined positions where specific fields have been filled in for
determine the uses of smart cards these comprise embedded microchips and receive power from the card readers microchip is made up of ram rom and
explain about the voice recognition systemthese voice recognition systems recognise spoken words eg for disabled people who cant use keyboards where
what is optical character recognition ocr information on paper is automatically read by a scanner and is then processedanalysed by ocr software
stata about the magnetic stripes these comprise informationdata stored on magnetic material often on the back of a creditdebit card the
explain about the biometrics this includes obtaining data and identifying characteristics automatically in security systems eg use of palm prints
determine about the radio frequency rfid this method includes using small electronic devices containing an identification microchip and antenna
what are the barcode readersthese collect data from printed barcodes and allow automatic stock control in for illustration
data logging this technique involves collecting data automatically using sensors frequently used when doing scientific experiments or monitoring
what is the role of microprocessors in it how they are used in medical field how they are used in our real lifes how they are used in
describe the block diagram of a system showing the following microprocessor memory system
determine about the logic gatesmany electronic circuits operate using binary logic gates logic gates essentially process signals that represent true
a shop sells books maps and magazines every item is identified by a unique 4 - digit code all books have a code starting with a 1 all maps have a
write an algorithm by using pseudocode which inputs top speeds of 5000 cars outputs fastest speed and the slowest speed outputs average speed of
write an algorithm using pseudocode which takes temperatures input over a 100 day period once per day and output the number of days when the
the following formula is used to calculate n n x x1 - x value x 0 is used to stop algorithm calculation is repeated using values of x until value
a town contains a total of 5000 houses every house owner has to pay tax based on value of the house houses over 200 000 pay 2 of their value in tax
loops there are 3 common ways of performing a looping functionfor to next while endwhile and repeat untilthe below example input 100 numbers and
explain the term - branching there are two common ways of branchingcase of otherwise endcase if then else endif case of
explain th term input and output- pseudocodeinput and output indicated by the use of terms input number print total output total print result is