Java OCA OCP Practice Question 2577

import java.io.Console;

class Login {//  www  .  j a va 2 s . c o m
     public static void main(String []args) {
             Console console = System.console();
             if(console != null) {
                     //#1
                     //#2
                     userName = console.readLine("Enter your username: ");
                     password = console.readPassword("Enter password: ");
                     System.out.println(userName + " ," + password);
             }
     }
}

a)      String userName = null;/*from   w w w .  ja  v  a  2  s .co m*/
    char[] password = null;

b)      String userName = null;
    String password = null;

c)      char[] userName = null;
    String password = null;

d)      char[] userName = null;
    char[] password = null;