7. What does the following function return?

　　char foo(void)

　　{

　　unsigned int a = 6;

　　iht b = -20;

　　char c;

　　(a+b > 6) ? (c=1): (c=0);

　　return c;

　　}

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

　　main()

　　{

　　int k, num= 30;

　　k =(num > 5 ? (num <=10 ? 100:200): 500);

　　printf(“%d”, k);

　　}

　　9. What will the following C code do?

　　int *ptr;

　　ptr =(int *)Ox67a9;

　　*ptr = Oxaa55;

　　10. What will be the output of the follow C code?

　　#define product(x) (x*x)

　　main()

　　{

　　int i = 3, j, k;

　　j = product(i++);

　　k = product(++i);

　　printf(“%d %d”,j,k);

　　}

　　11. Simplify the following Boolean expression

　　!((i ==12) || (j > 15))

　　12. How many flip-flop circuits are needed to spanide by 16?

　　13. Provides 3 properties that make an OS, a RTOS?