How to find the Lock table in oracle apps

SELECT   a.session_id,
         a.oracle_username,
         a.os_user_name,
         b.owner "OBJECT OWNER",
         b.object_name,
         b.object_type,
         a.locked_mode
  FROM   (SELECT   object_id,
                   SESSION_ID,
                   ORACLE_USERNAME,
                   OS_USER_NAME,
                   LOCKED_MODE
            FROM   v$locked_object) a, (SELECT   object_id,
                                                 owner,
                                                 object_name,
                                                 object_type
                                          FROM   dba_objects) b
 WHERE   a.object_id = b.object_id;

/

select sid,

decode(block ,0,'NO','YES') BLOCKER,

decode(request,0,'NO','YES') WAITER

from v$lock

where request > 0 or block > 0 order by block desc;