1. Static v Dynamic Data

2. 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

3. 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

4. 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]

5. 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

6. Internet v CDROM
Advantages of Internet:

7. Internet v CDROM
Disadvantages of Internet:

8. 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data can become out-of-date quickly

9. Internet v CDROM
Advantages of CDROM:

10. Internet v CDROM
Disadvantages of CDROM:

11. 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]