1. What will be the output of this program?

    int main()      
    {      
    int a=10, b=20;        
    printf("a=%d b=%d",a,b);        
    a=a+b;      
    b=a-b;      
    a=a-b;      
    printf("a=%d b=%d",a,b);      
    return 0;    
    }     

2. What is the output of the following code snippet?

#include 
int main() {
	int a[] = {1, 2, 3, 4};
	int sum = 0;
	for(int i = 0; i < 4; i++) {
	    sum += a[i];
	}
	printf("%d", sum);
	return 0;
}

3. How many times i value is checked in the following C program?

        #include 

        int main()

        {

            int i = 0;

            while (i < 3)

                i++;

            printf("In while loopn");

        }

4. What is the disadvantage of arrays in C?

5. What will be the output of the following C code?

        #include 

        int f(char chr, ...);

        int main()

        {

            char c = 97;

            f(c);

            return 0;

        }

        int f(char c, ...)

        {

            printf("%cn", c);

        }

6. What will be the output of the following C code?

#include 

int main()
{
    float x = 23.456;
    printf("%.2f",x);
    return 0;
}

7. What will be the output of the following C code?

        #include 

        int main()

        {

            printf("%d ", 1);

            goto l1;

            printf("%d ", 2);

            l1:goto l2;

            printf("%d ", 3);

            l2:printf("%d ", 4);

       }

8. What will be the output of the following C code?

        #include 

        void foo(int *ary[]);

        int main()

        {

            int ary[2][3];

            foo(ary);

        }

        void foo(int *ary[])

        {

            int i = 10, j = 2, k;

            ary[0] = &i;

            ary[1] = &j;

            *ary[0] = 2;

            for (k = 0;k < 2; k++)

            printf("%dn", *ary[k]);

        }

9. What will be the output of the following C code?

        #include 

        int main()

        {

            int x = 0;

            if (x == 1)

                if (x == 0)

                    printf("inside ifn");

                else

                    printf("inside else ifn");

            else

                printf("inside elsen");

        }

10. What will be the final values of i and j in the following C code?

    #include 

    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(); //bitwise or
        int j = g() | (f() + g()); //bitwise or
    }

                            

11. Which of the following is true about return type of functions in C?

12. The concept of two functions with same name is know as?

13. The syntax of the scanf() is scanf(“control string “, arg1,arg2,arg3,….,argn); the prototype of control string is ____________

14. What is the return type of the fopen() function in C?

15. Multiple values of the same variable can be tested using ___.