Author Question: Which of the following types of websites allows users to undertake many of the same activities as ... (Read 61 times)

colton · **on:** Jul 7, 2018

Which of the following types of websites allows users to undertake many of the same activities as bulletin boards?

A) discussion forums
B) iCalendars
C) blogs
D) instant messaging

Question 2

What does functional dependence mean? Illustrate with an example.

What will be an ideal response?

bookworm410 · **Reply #1 on:** Jul 7, 2018

Answer to Question 1

A

Answer to Question 2

Functional dependence means that for each value of the table's primary key, there should be just one value for each of the attributes in the record, and that the primary key determines that value. The attribute should be functionally dependent on the value of the primary key. For example, if employee ID is a primary key, then for each value of employee ID, there is exactly one value for each of the attributes included in the record, and the employee ID determines that value.