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 checking whether a particular bit is on or off?

3) What is the output of this C code?

#include <stdio.h>
     void main()
     {
         int x = 5.3 % 2;
         printf("Value of x is %d", x);
     }

4) Operator precedence determines which operator:

5) In mathematics and computer programming, which is the correct order of mathematical operators ?