Data integrity and ________ are critical issues for most businesses

A tree with n nodes must contain ______ edges.

a) n b) n – 1 c) n – 2 d) n / 2

There are three compiler warnings with this code. Can you spot them?

``` int main() { float a = 4.0, b = 8.0, c = 1.5; int x = 5, y = 7.5, z = 19.0; float q, r; int s, t; s = x + z/y*c; t = b/a * b*x + c; q = y * a+a * c; r = z % x+b/a; ```