SQL>
SQL>
SQL> show user;
USER is "DBAREADER"
SQL>
SQL>
SQL> select * from dba_db_links;

OWNER      DB_LINK    USERNAME   HOST                                CREATED
---------- ---------- ---------- ----------------------------------- ----------
PUBLIC     blablabla  DBAREADER  (DESCRIPTION = (ADDRESS_LIST =(ADDR 29-MAR-16
                                 ESS = (PROTOCOL = TCP)(HOST = blabla
                                 blabla)(PORT = 1521))) (CONNECT_DA
                                 TA = (SID = blabla)))

PUBLIC     blablabla    blablaa    (DESCRIPTION = (ADDRESS_LIST = (ADD 14-AUG-17
                                 RESS = (PROTOCOL = TCP)(HOST = "10.
                                 10.10.10")(PORT = 1521))) (CONNECT
                                 _DATA = (SID = blablabla)))

DBAREADER  OOPWORK    DBAREADER                                      06-SEP-17
                                   (DESCRIPTION=
                                     (ADDRESS=
                                       (PROTOCOL=TCP)
                                       (HOST=10.9.8.7)
                                       (PORT=1521)
                                     )
                                     (CONNECT_DATA=
                                       (SERVICE_NAME=OOPWORK)
                                     )
                                   )



SQL>
SQL>
SQL> select * from dba_sys_privs where grantee = 'DBAREADER';

GRANTEE    PRIVILEGE                           ADM
---------- ----------------------------------- ---
DBAREADER  CREATE SESSION                      NO
DBAREADER  SELECT ANY TABLE                    NO
DBAREADER  UNLIMITED TABLESPACE                NO
DBAREADER  ALTER DATABASE LINK                 NO
DBAREADER  DROP PUBLIC DATABASE LINK           NO
DBAREADER  CREATE DATABASE LINK                YES

6 rows selected.

SQL>
SQL>
SQL> select * from user_role_privs;

USERNAME   GRANTED_ROLE                   ADM DEF OS_
---------- ------------------------------ --- --- ---
DBAREADER  DBA                            NO  YES NO

SQL>
SQL>
SQL> drop database link OOPWORK;
drop database link OOPWORK
                   *
ERROR at line 1:
ORA-01031: insufficient privileges


SQL> Disconnected from Oracle Database 11g Release 11.2.0.4.0 - 64bit Production