C-Programing Sample test 1

1. What will the value of x be after the following steps are executed
char * message;
message = (char *) malloc (sizeof(char) * 10);
message = "hello";
x = strlen (message);

(a)  0
(b)  5
(c)  10
(d)  The statements would not compile.



2. (int i=0; i <256; i++2)
printf("%d", i);

How many times will this loop execute?

(a)  256
(b)  128
(c)  127
(d)  Infinitely.



3. What is the output of the program?
main()
{
  int i = 5;
  i = ! i>3;
  printf(”%d”,i);

(a)  5
(b)  0
(c)  3
(d)  processor dependent.


4. What is the output of the following
main()
{
   int x[10] = {1,2,3,4,5,6,7,8,9,10};
   int *p = x;
   int *q = &x[9];
   printf ("%d", q-p+1);
}

(a) 0
(b) 19
(c) 10
(d) Error


5.          main()
   
{
int a = 0;
int *p = &a;
free(p);
printf(”%d”, a);
}

(a) Works fine
(b) Free can’t be used for p
(c) Compiler Error
(d) In printf we should use *p instead of i



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