A ________ key is required when one field alone can not be used to identify each unique record in a table

A(n) ______ is a private combination of words associated with a user name that allows access to certain computer resources.

Fill in the blank(s) with the appropriate word(s).

In terms of the relationship between work=duration * units when changes are made to a task after a resource assignment, if you modify or add work, the duration changes to balance the formula.

Answer the following statement true (T) or false (F)