______ method_______ is used to obtain a Connection to a database.

To prevent others from altering the formulas or changing other template components, you should use ________

A) validation B) protection C) uniformity D) standardization

What is the output of the following code fragment?

int f1(int x, int y) { if(x<0 || y<0) return x-y; else return f1(x-1,y) + f1(x,y-1); } int main() { cout << f1(1,2)<