A database is used instead of a spreadsheet when ________. A) ...

[theo]

A database is used instead of a spreadsheet when ________.
 
  A) lists of data involve a single theme
  B) structures of data lists are simple
  C) lists involve data with multiple themes
  D) users do not want to store all data in one place

Question 2

What are expert systems?
 
  What will be an ideal response?

[yotaSR5]

Answer to Question 1

C

Answer to Question 2

Expert systems are rule-based systems that encode human knowledge in the form of If/Then rules. Such rules are statements that specify if a particular condition exists, then some action should be taken. A real-world expert system may consist of hundreds, if not thousands, of rules. The programs that process a set of rules are called expert systems shells. Typically, the shell processes rules until no value changes. At that point, the values of all the variables are reported as results. To create the system of rules, the expert system development team interviews human experts in the domain of interest. Expert systems are difficult and expensive to develop and maintain.