[qsort]

The real question is what else you don't know if you don't even know that...

The power series definition of the exponential function is basic mathematics, and is widely used in financial modeling. This cowboy attitude towards math is just depressing.

An alternative closely related interview question that's a favorite of mine is "please compute the monthly payment for a $200,000 mortgage over 20 years at 3% yearly interest".

You shouldn't be allowed to graduate high school without knowing how to do that, and you'd be surprised how many self-described economists can't answer it.

[cameron_b]

But the farther from high school the less likely to remember.

Yes I did that in my C++ class in high school. But no I couldn’t do it now and end up with the right answer without some review. I’ve spent a decade and a half doing other things that should matter more than sword drills.