Interview question: "What is your grading system?"

Here is a popular interview question: "What is your grading system?"
I prefer total point grading system. Need to elaborate on this here....
A+ Highest passing grade 4.0
A 4.0
A- 3.7
B+ 3.3
B 3.0
B- 2.7
C+ 2.3
C 2.0
C- 1.7
D+ 1.3
D 1.0
D- Lowest passing grade 0.7
P Passing -
S Satisfactory -
F Failure 0.0
W Withdrawn -
I Incomplete -
R Deferred Grade -
NC No Credit -
NR No grade received -
NY Signifies enrollment in a special program for which credit earned will be recorded when completed.