Modulus operator, %, can be applied to which of these?

Modulus operator, %, can be applied to which of these?

2) If a=20 and b=15 then the statement x=(a>b) ? a:b; will assign value of x.

3)

public class Test  
{
        public static void main(String args[])
  {
       System.out.print(""=="");
        System.out.print(" ");
       System.out.print("A"=="A");
      System.out.print(" ");
       System.out.print("a==A");
        }
  }

4) Decrement operator, −−, decreases value of variable by what number?

5) When the operator ++ is placed after the variable name, first assignment of the value of the variable takes place and then the value of the variable is incremented, this operation is also called ………………………….. .