Which bitwise operator is suitable for turning on a particular bit in a number?

Which bitwise operator is suitable for turning on a particular bit in a number?

2) Which bitwise operator is suitable for turning off a particular bit in a number?

3) Which of the following is not logical operator?

4) 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;
   }
 }

5) What is the output of this C code?

#include <stdio.h>
     int main()
     {
         int i = -5;
         i = i / 3;
         printf("%d
", i);
         return 0;
     }