switch from sysdba to another user without password

SQL> CONNECT / as sysdba
Connected.

SQL> SELECT password FROM dba_users WHERE  username='SCOTT';
PASSWORD
--------------- ---------------
F894844C34402B67

in 11g, the password won't display anymore, instead, use this:

SQL> select name,password from sys.user$ where name='SCOTT';

SQL> ALTER USER scott IDENTIFIED BY anything;
User altered.

SQL> CONNECT scott/anything
Connected.

OK, we're in. Let's quickly change the password back before anybody notices.

SQL> ALTER USER scott IDENTIFIED BY VALUES 'F894844C34402B67';
User altered.