Static v Dynamic Data.

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Presentation transcript:

Static v Dynamic Data

Learning Objectives: At the end of this topic you should be able to: describe the terms static and dynamic data; compare the use of static information sources compared to dynamic sources

Static and Dynamic Sources of Data Static Source one in which the data remains the same. textbooks, DVD encyclopaedia, CDROM or paper catalogue Dynamic Source one where the data changes, usually changes in order to keep up to date a shop’s web pages on the Internet a newspaper’s page on the Internet flight arrival information on an airline’s web site

Exam questions: Airport Cars need to check the up-to-date landing times of its customers’ flights. This is done by using the flight arrivals section of each airport’s website. Explain the difference between static & dynamic data. [4] Evaluate the use of dynamic data in this situation. [2] A website is to be developed that will be used by customers to place orders for plants. Explain the benefits of using static data in the website [6]

Internet v CDROM Internet Advantages: can hold larger amounts of information than a CDROM. data can be updated very quickly access data from any computer connected to the Internet reach a larger audience Disadvantages: need access to the Internet. more likely to be infected by a virus. searching can take time due to access speeds & number of web pages

Internet v CDROM Advantages of Internet:

Internet v CDROM Disadvantages of Internet:

Internet v CDROM CDROM Advantages low cost of creating CD-ROM. more reliable source of information than Internet? don’t need Internet access Disadvantages: limited amount of data stored only 1 computer can access data at a time data data can become out-of-date quickly

Internet v CDROM Advantages of CDROM:

Internet v CDROM Disadvantages of CDROM:

Exam questions: At present the goods supplied by the company “Useful Things” can be viewed on the company website. Explain the advantages of using a website rather than a CD-ROM to show the goods supplied by Useful Things. [6] The publishing company has decided that it needs a different way of advertising its books. Compare for this purpose using web pages issuing each shop with CD-ROMs [6]