QA vx QC

Can anyone tell me what the difference is between these two titles, if any. I alsways thought they were used interchangeably but the Quality Manager is saying there is a distinct difference.
Also, does anyone have these as exempt positions?
Also, does anyone have these as exempt positions?
Comments
Our QA inspectors are nonexempt; supervisors are of course exempt.
Sounds like QC is more at the end of the process and QA is alongside of it.
Thank you!
Does ANYONE have exempt QC/QA people?