password for sysdba

Hi,

I've created a test database on the linux machine (Red-Hat 9). I found that any user can connect as sysdba as follows:

SQL> connect user as sysdba
Enter password: -- I entered a random value Connected
SQL> I'm very confused at this, is there a password for sysdba? Received on Sat Dec 20 2003 - 12:19:16 CST