Pointer MCQs

What will be the output of the following C code?

#include <stdio.h>
void (*(f)())(int, float);
typedef void (*(*x)())(int, float);
void foo(int i, float f);
int main()
{
    x = f;
    x();
}
void (*(f)())(int, float)
{
    return foo;
}
void foo(int i, float f)
{
    printf("%d %f\n", i, f);
}

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    char *str = "hello, world\n";
    str[5] = '.';
    printf("%s\n", str);
    return 0;
}

Is the below declaration legal?

int* ((*x)())[2];

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    int a[2][3] = {1, 2, 3, , 4, 5};
    int i = 0, j = 0;
    for (i = 0; i < 2; i++)
    for (j = 0; j < 3; j++)
    printf("%d", a[i][j]);
}

What will be the output of the following C code (run without any command line arguments)?

#include <stdio.h>
int main(int argc, char *argv[])
{
    while (*argv++ != NULL)
    printf("%s\n", *argv);
    return 0;
}

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    char s[] = "hello";
    s++;
    printf("%c\n", *s);
}

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int i = 11;
    int *p = &i
    foo(&p);
    printf("%d ", *p);
}
void foo(int *const *p)
{
    int j = 10;
    *p = &j
    printf("%d ", **p);
}

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    int k = 5;
    int *p = &k
    int **m  = &p
    printf("%d%d%d\n", k, *p, **p);
}

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    int x = 0;
    int *ptr = &5;
    printf("%p\n", ptr);
}