A class that implements an interface but only gives definitions for some of the method headings given in the interface is called a/an:

In query criteria, a(n) ________ character can be used to match any combination of letters or characters

Fill in the blank(s) with correct word

If the cell being referenced in a formula has been deleted or moved, you will get a(n) ________ error

A) #DIV/0! B) #NUM! C) #REF! D) #NULL!