Assume the following C variable declaration

int * A[10], B[10][10];

Of the following expressions

I. A[2]
II. A[2] [3]
III. B[1]
IV. B[2] [3]

Which will not give compile-time errors if used as left hand sides of assignment statements in a C program?

Consider the following C function.

float f,(float x, int y) {
    float p, s; int i;
    for (s=1,p=1,i=1; i < y; i++) {
         p *= x/i;
         s+=p;
    }
return s;
}

For large values of y, the return value of the function f best approximates

Consider the set $$\sum {^ * } $$ of all strings over the alphabet $$\,\sum { = \,\,\,\left\{ {0,\,\,\,1} \right\}.\sum {^ * } } $$ with the concatenation operator for strings

The regular expression $${0^ * }\left( {{{10}^ * }} \right){}^ * $$denotes the same set as