>Hi,
>I m new to ORACLE world. I m doing OCP DBA.
>CAN anybody tell me the responsibilities of a DBA in a company/project.
>Regarding BACKUP and Tuning - how do they manage it?
>
>Thanx in Advance
>Madan

Check out this list for DBA checklist
http://examples.oreilly.com/ordbacheck/dba_checklist14.doc

As for Backup and Tuning there are many books written on this subject. The OCP book should gover all of them.

Mo