How to find the privileges and roles granted to a user in Oracle?

Question

I am using Linux, Oracle10g. I have created one user called test. and granted create session and select any dictionary permission to the same user.

i also granted sysdba and sysoper roles to the same users.

Now i want to display all the privileges and roles granted to the user. I found following query but it shows only create session and select dictionary privileges.

select privilege 
from dba_sys_privs 
where grantee='SAMPLE' 
order by 1;

please help to resolve the issue.

Thanks

Answer 1

In addition to VAV's answer, The first one was most useful in my environment

select * from USER_ROLE_PRIVS where USERNAME='SAMPLE';
select * from USER_TAB_PRIVS where Grantee = 'SAMPLE';
select * from USER_SYS_PRIVS where USERNAME = 'SAMPLE';