Which bitwise operator is suitable for checking whether a particular bit is on o

Which bitwise operator is suitable for checking whether a particular bit is on or off?

2) What is the output of this C code?

#include <stdio.h>
     int main()
     {
         int a = 10;
         double b = 5.6;
         int c;
         c = a + b;
         printf("%d", c);
     }

3) Which of the following is not logical operator?

4) The operator && in 'C' language is a (n):

5) What is the output of this C code?

 #include <stdio.h>
     void main()
     {
         1 < 2 ? return 1: return 2;
     }