C Typedefs Quiz Online Practice Test

1. What will be the output of the following C code?
#include <stdio.h>
typedef struct student
{
char *a;
} stu;

void main()
{
struct stu s;
s.a = "hi";
printf("%s", s.a);
}

2. What will be the output of the following C code?
#include <stdio.h>
typedef struct student
{
char *a;
} stu;

void main()
{
struct student s;
s.a = "hey";
printf("%s", s.a);
}

3. What will be the output of the following C code?
#include <stdio.h>
typedef int integer;

int main()
{
int i = 10, *ptr;
float f = 20;
integer j = i;
ptr = &j;
printf("%d\n", *ptr);
return 0;
}

4. What will be the output of the following C code?
#include <stdio.h>
int (*(x()))[2];
typedef int (*(*ptr)())[2] ptrfoo;

int main()
{
ptrfoo ptr1;
ptr1 = x;
ptr1();
return 0;
}

int (*(x()))[2]
{
int (*ary)[2] = malloc(sizeof*ary);
return &ary;
}

5. What will be the output of the following C code?
#include <stdio.h>
int *(*(x()))[2];
typedef int **(*ptrfoo)())[2];
int main()
{
ptrfoo ptr1;
ptr1 = x;
ptr1();
return 0;
}
int *(*(x()))[2]
{
int (*ary)[2] = malloc(sizeof * ary);
return &ary;
}

6. What will be the output of the following C code?
#include <stdio.h>
typedef struct p
{
int x, y;
} p; // Added missing struct alias
int main()
{
p k1 = {1, 2};
printf("%d\n", k1.x);
}

7. What will be the output of the following C code?
#include <stdio.h>
typedef struct p
{
int x, y;
} p; // Corrected struct alias declaration
k = {1, 2}; // Removed invalid declaration
int main()
{
p k1 = {1, 2}; // Added initialization for k1
printf("%d\n", k1.x);
}

8. What will be the output of the following C code?
#include <stdio.h>
typedef struct p
{
int x, y;
} k; // Corrected struct alias declaration
int main()
{
struct p p = {1, 2}; // Defined struct variable p
k k1 = p; // This will cause a compile-time error due to type mismatch
printf("%d\n", k1.x);
}

9. Which option should be selected to work with the following C expression?
string p = "HELLO";

10. Identify the correct initialization method for the following typedef:
typedef char *string;

11. Determine which statement about typedef is incorrect:

12. Identify which of the following options could potentially cause issues in a typedef program:

13. The typedef statement `typedef int (*PFI)(char *, char *)` creates ___________

14. What does a typedef declaration do?

15. What is the output of the following C code?
#include <stdio.h>
typedef struct student
{
char *a;
} stu;
void main()
{
stu s;
s.a = "hi";
printf("%s", s.a);
}