Free Essay

Data Processing

In: Computers and Technology

Submitted By jones126
Words 1074
Pages 5
Computer Information Systems Paper

Charles E. Jones Jr.
CIS/319 Version 8
April 29, 2012
Ike Shia

Abstract
This paper is to focus on the accuracy, convenience, different types of storage methods, and the roles they play as far as the speed of the systems. Throughout the paper it discusses the best input and output methods for various hardware and software.

Accuracy of Data
Accuracy of data input is important. What method of data input would be best for each of the following situations and why: As far for printed questionnaires the best method for data input would be a keyboard, because it permits one to produce the required test that formulates the questionnaires. The best method for a telephone survey would be voice recognition and recording system because a voice input device can be programmed to distinguish and record answers spoken into the receiver allowing it to all be computed. Bank checks would best be used in a scanning method that recognizes bar codes. To be more specific a magnetic scanning input device would be the exact system to use. This system reads the numbers at the bottom of the checks and will mechanically make modifications to the correct accounts. It will input the codes in a system will magnetize the information at the bottom of the check for simple interpretation. For retail tags the best data input for would be a bar code scanner as well. This specific scanner is called an optical scanning input device. By using a bar code scanner it would be unnecessary to use a keyboard to enter numbers manually. Finally for the long documents the best method to use would be to use a simple scanner linked to computer due to the fact that it can be easily kept in order and sequence. Convenience and Quality Convenience and quality of output are important. Explain what method of output would be best for each of the following situations and why:
The best method for a hand held computer would be a screen, because most people can easily read them, and their display can change quickly. For Color photograph the best method of output for this situation is an ink-jet, due to the high printing quality that a color photograph demand. As far for a Resume the best method would be a laser or ink-jet for printing, due to their specific format they require a good printing quality, it would be as a business letter, and therefore you’ll need a good quality printing system. For a memorandum statistical report and a company annual report a printer would be the best for all of the last situations because hard copies would be needed to pass around and have firm visual of the information being distributed. Being that everyone does not have access to video or internet this would be the best method to use.
Storage Devices
Different types of storage devices are optimal for different situations. Explain what situations are appropriate for the following devices and why:
Hard disks are needed for your computer to boot up. They store all the info that you need to run applications and all the files that you create. Extra hard drives are an expectable way to back up an entire main drive. Floppy disks are no longer appropriate for temporary storage because floppy disk drives are no longer standard equipment on computers. They would be useless to more updated systems. A RAM is necessary for your computer to complete operations faster than if it had to keep accessing the hard drive for information. With the right system the ram can work very with the server. For a CD-ROM it is an optical drive that will also fall in the category with the floppy disk. Although it is still used in the more updated systems it is still not as efficient. It can hold a lot of information but is easily damaged and rendered unreadable. Using a tape is another older method of storing back up data for your computer. This also categorized with the floppy disk tape drives are no longer effective for backing up hard drives in the modern computers. Flash drives are the most convenient way to transfer files from one computer to another. it can hold much more information, and less likely to become damaged unlike the CD-ROM.

Determining the speed of a computer
Explain the role of each of the following in determining the speed of a computer:
Next to the CPU, RAM is one of the most speed-critical elements on your computer. In most cases, even with a fast CPU, a system without enough RAM will be slow. On systems without enough RAM, this light will be constantly blinking off and on. The more RAM a system has, the less it has to access the hard drive to change out data and the longer that hard drive will last. When your CPU requests a file, the hard drive delivers that file and puts it into RAM where it can be manipulated with greater speed. A Clock speed is a measure of how fast a computer completes basic computations and operations. For example a computer with a clock speed of 800MHz is running 800,000,000 cycles per second, while a 2.4GHz computer is running 2,400,000,000 cycles per second. The clock speed of the CPU isn't such a reliable test of overall computer speed. Many other factors come into play, the amount of RAM a computer has, the clock speed of that RAM, the clock speed of the front-side bus, and the cache size all play significant roles in determining the performance. CD-ROM drives are rated with a speed factor. It gives a data transfer rate of 150 kilobytes per second in the most common data format. For example, an 8x CD-ROM data transfer rate would be 1.2 megabytes per second. Generally, a speed factor of around 52x is considered excellent. Floppy drives are generally slow even if you have the best of them.

References
Hoffman, W. and Moore, J., Eds. Ethics and the Management of Computer Technology, Oelgeschlager, Gunn and Hain, Cambridge, Mass., 1982.

N. Gibbs, D. Jain, A. Joshi, S. Muddamsetti, S. Singh. A New Auditor’s Guide to planning, performing and presenting IT Audits., 2010

Parker, R., Lotus copyright protection is turning into a feeding frenzy, Infoworld, 12, 28 (Jul. 1990), 42-49.

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