Computer and Information Processing

1-Accuracy of data input is important . What method of data input would be best for each of the following situations and explain why

a-printed questionnaires

The use of computer keyboard is best in producing an accurate data input . This reduces the possibility of errors in when using other methods such as handwritten type

b-telephone survey

Data input is best when using the telephone touch-tone that generates Dual Tone Multi-Frequency signals for dialing (Wikipedia , 2007 . It is more definite than other methods such as voice recognition which has the bigger possibility

of mistake

c-bank checks

The appropriate input data method would be through Optical Scanning Input device that allows quick scan and routing of the check to the proper banks . The characters within a bank check are recognized through optical character recognition (OCR . This is the electronic identification and digital encoding of printed or handwritten characters by means of an optical scanner and specialized software (Answers .com 2007 . Since bank prints have specific data for each bank , this difference can be used to route them according to the proper bank destination

d-retail tags

Data input is best using optical scanning device of bar codes printed within the retail prices . This allows automatic pricing of retail items and the tags can easily be generated to contain some bar codes

e-long documents

A scanner would be the best way of getting long documents into a computer . Retyping them would take too much time

2-Convenience and quality of output are important . Explain what method of output would be best for each of the following situations and explain why

a- hand held computer

LCD display can be make lightweight as oppose to vacuum tube which are very heavy . Vacuum tubes are too impractical to be packaged for handheld devices

b-color photograph

Photographic print out through printers design specifically for photographs . Ordinary household printers like bubble-jet printers normally suffer from poor quality and poor

c-Resume

Color print using bubble-jet or ink jet printer would be the most convenient . Color printout allows printing of pictures embedded within the resume

d-Memorandum

Blank and white print using laser jet printers are the most appropriate Memorandum does not require colors because it is the content of the message that is important . Since memorandums are almost always being printed , the use of laser jet printers using toners makes printing more cost-effective in the long run . Bubble jet printers normally have very expensive ink and needs to be replaced more often

e-Statistical report

Statistical reports normally include large data that are presented in large graphs like pie-chart . The most appropriate are color printers that are capable of printing large such as A3 and bigger sizes

f-Company Annual report

Annual report should best remain as digital media that is outputted to computer screen . The addition of interactive graphs makes the digital formats more appropriate

3-Different types of storage devices are optimal for different situations . Explain what situations are appropriate for the following devices and explain why

a-Hard Disk

Hard disk are...