ORACLE instance started.
background_dump_dest, core_dump_dest, and user_dump_dest have been deprecated and replaced by the single parameter diagnostic_dest in oracle 11g.
SQL>SELECT isdeprecated,name,value FROM v$parameter WHERE name like ‘%dump_dest%’;
ISDEP NAME VALUE
—– —————————————- ————————————————————
TRUE background_dump_dest /export/home/oracle/diag/rdbms/shark/shark/trace
TRUE user_dump_dest /export/home/oracle/diag/rdbms/shark/shark/trace
FALSE core_dump_dest /export/home/oracle/diag/rdbms/shark/shark/cdump
So from above result, it is clear that core dump dest is still in 11g and if it is deprecated/obsolete,
then oracle will def mention them in dictionary view
bdump, udump and cdump directories and the initialization parameters background_dump_dest and user_dump_dest are deprecated in 11g.