Another way to find the Jdev Path and DBC file Location.

Log on to Sysadmin-> profiles->
Personalize Self-Service Defn Yes
2)Bounce the Apache and click on about This page.
3)Click on Java System Properties
System Property
DBCLocation :
-> /u02/app/apntstv2/ntstv2appl/fnd/11.5.0/secure/ntstv2_nacdell03/

Then Click on Technology Components
Product/Component
1)OA Framework -> 11.5.10 2CU
2)Oracle Applications Extension -> 9.0.3.8.12 (build 1271)
3)Business Components->9.0.3.13.51
4)MDS->9.0.5.4.81_481