Which of the following is not logical operator?

Which of the following is not logical operator?

2) Consider the following program segment:

 main()
 {
   int a,b,c;
   b=3;
   a=2;
   a=2*(b++);
   c=2*(++b);
 }

3) What will be the value of count after the following program is executed?

 main()
 {
   int count, digit=0;
   count=1;
   while(digit<=9)
   {
     printf("%d\n",++count);
 	++digit;
   }
 }

4) Consider the following statements:

 int a=2, b=3, c=4;
 a=(b++) +c;
 b=a+(++c);

5) What is the output of this C code?

#include <stdio.h>
     void main()
     {
         char a = 'a';
         int x = (a % 10)++;
         printf("%d\n", x);
     }