Oracle certification tracks

Oracle Corporation Offers the following Oracle Certification Tracks:
Oracle Database Operator (DBO)
Database Operators assist DBAs with day to day operational issues like database startup and shutdown, installations, backup and recoveries, etc.

Oracle Certified Associate (OCA)
Enables one to act as a junior team member working with database administrators or application developers.

Oracle Certified Professional (OCP)
OCP candidates have proven skills for managing a large scale database or developing robust applications that are deployed enterprise-wide.

Oracle Certified Master (OCM)
The highest level credential you can earn in the Oracle Certification Program. These people are senior level members of IT departments and are responsible for handling mission critical database systems and applications.

Click here for More Information about Oracle Tutorials and Practice Questions and Study Papers for 9i , 10g , Oracle Financials , Siebel 7.7 Certification.