C Programming

What is the output of the following C code? Assume that the address of x is 2000 (in decimal) and an integer requires four bytes of memory.

int main () {
    unsigned int x[4][3] =
        {{1,2,3},{4,5,6},{7,8,9},{10,11,12}};
    printf("%u, %u, %u", x+3, *(x+3), *(x+2)+3);
}

Consider the C program below.

#include <stdio.h>
int *A, stkTop;

int stkFunc(int opcode, int val)
{
    static int size=0, stkTop=0;

    switch (opcode) {
        case -1: size = val; break;
        case  0: if (stkTop < size) A[stkTop++] = val; break;
        default: if (stkTop) return A[--stkTop];
    }
    return -1;
}

int main()
{
    int B[20]; A = B; stkTop = -1;

    stkFunc (-1, 10);
    stkFunc ( 0, 5);
    stkFunc ( 0, 10);
    printf ("%d\n", stkFunc(1, 0) + stkFunc(1, 0));
}

The value printed by the above program is _____.

Consider the following C program.

#include<stdio.h>
int f1(void);
int f2(void);
int f3(void);
int x = 10;

int main( )
{
    int x = 1;
    x += f1( ) + f2( ) + f3( ) + f2( );
    printf("%d", x);
    return 0;
}

int f1() { int x = 25; x++; return x;}
int f2() { static int x = 50; x++; return x;}
int f3() { x *= 10; return x};

The output of the program is _____.

Consider the following C program.

#include<stdio.h>
int main( )
{
    static int a[ ] = {10, 20, 30, 40, 50};
    static int *p[ ] = {a, a+3, a+4, a+1, a+2};
    int **ptr = p;
    ptr++;
    printf("%d%d", ptr-p, **ptr);
}

The output of the program is _____.

Consider the following C program:

#include<stdio.h>
int main( )
{
    int i, j, k = 0;
    j = 2 * 3 / 4 + 2.0 / 5 + 8 / 5;
    k -= --j;
    for(i = 0; i < 5; i++)
    {
        switch(i + k)
        {
            case 1:
            case 2: printf("\n%d", i+k);
            case 3: printf("\n%d", i+k);
            default: printf("\n%d", i+k);
        }
    }
    return 0;
}

The number of times printf statement is executed is _____.