Knowing was "megapixel" means is a pretty basic piece of information. It's at least a bit weird to not know that and yet want to provide
sign making services to customers.
No personal offense intended by this, but anyone designing
signs (especially anyone who actually sits in front of the
computer doing the work) should have very good or expert knowledge of general
computer issues,
computer graphics and principals in graphic design. Having artistic talent and good design sense is really kind of crucial as well.
It's a pretty stupid situation if the average customer off the street has the same level of
computer knowledge and design savvy as the guy laying out the
sign design.