Using Nodes in calculation views

Question 1

In what cases is projection node commonly used

Answer 1

A)To filter measures based on attribute values
B) To extract only some columns from a data source
C) To define calculated columns before an aggregate occurs

Question 2

What would a factsheet be made from?

Answer 2

A star join

Question 3

How many, and what are the nod join types?

Answer 3

There are 8
Inner
Left outer
Right outer
Full outer
Referential
Temporal 
Text
Spatial