Which Options are installed on your oracle database

There are various ways to know which options are installed on your oracle database. Below is some.
1)Using Oracle Universal Installer:
-Go to oracle database software installer.
-Under install folder run oracle universal installer. On windows it is oui.exe and on unix it is runIstaller.sh
-Select Installed Products.
-In the Inventory expand the selection and you can see list of options installed.

2)From V$OPTION:
From v$option view the column value's value TRUE means the corresponding option is installed/available and FALSE mean corresponding option is not installed/ not available.
SQL> set pages 100
SQL> col value for a5
SQL> set lines 120
SQL> select * from v$option;
PARAMETER VALUE
---------------------------------------------------------------- -----
Partitioning TRUE
Objects TRUE
Real Application Clusters FALSE
Advanced replication TRUE
.
.

Which indicates partition can be done or in other word partitioning feature is available but RAC is not installed or in other word RAC yet not available.

3)From DBA_REGISTRY:
In order to know which components are loaded into database and what is their current status issue,
SQL> col comp_name for a70
SQL> select comp_name, status from dba_registry;

COMP_NAME STATUS
---------------------------------------------------------------------- -----------
Oracle Database Catalog Views VALID
Oracle Database Packages and Types VALID
Oracle Workspace Manager VALID
JServer JAVA Virtual Machine VALID
Oracle XDK VALID
Oracle Database Java Packages VALID
Oracle Expression Filter VALID
Oracle Data Mining VALID
Oracle Text VALID
Oracle XML Database VALID
Oracle Rules Manager VALID
Oracle interMedia VALID
OLAP Analytic Workspace VALID
Oracle OLAP API VALID
OLAP Catalog VALID
Spatial VALID
Oracle Enterprise Manager VALID

17 rows selected.