C Programming Questions and Answers

What will be the output of the program?

# define P printf("%d\n", -1^~0);#define M(P) int main()\
             {\
                P\
                return0;\
             }
M(P)

What will be the output of the program ?

#include < stdio . h >int main()
{
    int i=32, j=0x20, k, l, m;
    k=i|j;
    l=i&j;
    m=k^l;
    printf("%d, %d, %d, %d, %d\n", i, j, k, l, m);
    return0;
}

What will be the output of the program?

#include < stdio . h >int main()
{
    printf("%d %d\n", 32<<1, 32<<0);
    printf("%d %d\n", 32<<-1, 32<<-0);
    printf("%d %d\n", 32>>1, 32>>0);
    printf("%d %d\n", 32>>-1, 32>>-0);
    return0;
}

What will be the output of the program?

#include < stdio . h >int main()
{
    unsignedint res;
    res = (64 >>(2+1-2)) & (~(1<<2));
    printf("%d\n", res);
    return0;
}

What will be the output of the program ?

#include < stdio . h >int main()
{
    int i=4, j=8;
    printf("%d, %d, %d\n", i|j&j|i, i|j&&j|i, i^j);
    return0;
}

Which header file should be included to use functions like malloc() and calloc()?

What will be the output of the program?

#include < stdio . h >#include < stdlib . h >int main()
{
    int *p;
    p = (int *) malloc (20); /* Assume p has address of 1314 */free(p);
    printf("%u", p);
    return0;
}

What will be the output of the program (16-bit platform)?

#include < stdio . h >#include < stdlib . h >int main()
{
    int *p;
    p = (int *) malloc (20);
    printf("%d\n", sizeof (p));
    free(p);
    return0;
}

What will be the output of the program?

#include < stdio . h >#includeint main()
{
    char *s;
    char *fun();
    s = fun();
    printf("%s\n", s);
    return0;
}
char *fun()
{
    char buffer[30];
    strcpy(buffer, "RAM");
    return (buffer);
}

Assume integer is 2 bytes wide. What will be the output of the following code?

#include < stdio . h >#include < stdlib . h >#define MAXROW 3#define MAXCOL 4int main()
{
    int (*p)[MAXCOL];
    p = (int (*) [MAXCOL]) malloc( MAXROW *sizeof (*p));
    printf("%d, %d\n", sizeof(p), sizeof(*p));
    return0;
}