Oracle Database Discussions

Hello ,
I got something new in oracle which surprises me !!!!!!!!!!!!!!!

step 1> I have open the command prompt of Windows XP. Then i typed .... sqlplus(enter)

d:>splplus

step 2> I have logged in as sys as sysdba with password sys.

usersname:sys as sysdba
password:sys
connected.

stept 3> I have changed the password of sys to dba.

SQL>Alter user sys identified by dba;
User Altered.

step 4> I logout of sqlplus

SQL>exit;


step 5> Now i repeat all the steps above and log in sys as sysdba with password sys.

Username:sys as sysdba
password:sys
Connected.

How does it take still the old password when i have altered it to the new password. ?????


I tried to login with the new password , then also it allows to do so ......why is this happening and what to do
*?????*

Thanks in advance .....