Precedence and Order of Evaluation 3 Quiz Online Practice Test

1. What will the following C code print as output?
#include <stdio.h>
void reverse(int i);
int main()
{
reverse(1);
}
void reverse(int i)
{
if (i > 5)
exit(0);
printf("%d\n", i);
return reverse(i++);
}

2. What will the output be for this C function?
#include <stdio.h>
void reverse(int i);
int main()
{
reverse(1);
}
void reverse(int i)
{
if (i > 5)
return;
printf("%d ", i);
return reverse((i++, i));
}

3. In the expression i = g() + f(), the first function called depends on:

4. What will be the final result of the variables `i` and `j` after running the following C program?

#include <stdio.h>
int x = 0;
int f()
{
if (x == 0)
return ++x;
else
return --x;
}
int g()
{
return x++;
}
int main()
{
int i, j;
i = (f() + g()) || g();
x = 0;
j = g() || (f() + g());
}

5. What are the final values of `i` and `j` in the following C code using bitwise OR?
#include <stdio.h>
int x = 0;
int f()
{
if (x == 0)
return x + 1;
else
return x - 1;
}
int g()
{
return x++;
}
int main()
{
int i = (f() + g()) | g();
int j = g() | (f() + g());
}

6. What will the following C program print as the output?
#include <stdio.h>
int main()
{
int x = 2, y = 0;
int z = y && (y |= 10);
printf("%d\n", z);
return 0;
}

7. What does the following C code output?
#include <stdio.h>
int main()
{
int x = 2, y = 0;
int z = (y++) ? 2 : y == 1 && x;
printf("%d\n", z);
return 0;
}

8. What will the following C code output?
#include <stdio.h>
int main()
{
int x = 2, y = 0;
int z;
z = (y++, y);
printf("%d\n", z);
return 0;
}

9. What will the following C code print?
#include <stdio.h>
int main()
{
int x = 2, y = 0, l;
int z;
z = y = 1, l = x && y;
printf("%d\n", l);
return 0;
}

10. What will the following C code output?
#include <stdio.h>
int main()
{
int y = 2;
int z = y + (y = 10);
printf("%d\n", z);
}

11. Which operators from the list are unary?

12. In which context does the order of operator precedence not apply in C?

13. The associativity of an operator is:

14. Which of the following assignments is valid?

15. Which scenario is NOT possible for any two operators in C?

16. Which of these scenarios can occur with any two operators in C?

17. Which operator has the lowest precedence?

18. What is the output of this C code?
#include <stdio.h>
int main()
{
int x = 3, i = 0;
do {
x = x++;
i++;
} while (i != 3);
printf("%d\n", x);
}

19. What will this C code output?
#include <stdio.h>
int main()
{
int a = -1, b = 4, c = 1, d;
d = ++a && ++b || ++c;
printf("%d, %d, %d, %d\n", a, b, c, d);
return 0;
}

20. What does this C code output?
#include <stdio.h>
int main()
{
int p = 10, q = 20, r;
if (r = p = 5 || q > 20)
printf("%d", r);
else
printf("No Output\n");
}