The Oracle Certified Master is the industry's most advanced certification
The Oracle Certified Master credential is for Oracle Certified Professionals with advanced training and at least 3 - 4 years of professional enterprise-level Oracle experience. To become an Oracle Certified Master a candidate must complete two required advanced DBA courses from Oracle University and pass an Oracle Certified Master exam.
Expert Advice about the OCM Exam from Senior OU Instructors We recommend minimum Oracle experience of 3 - 4 years; more typical of the qualified candidate would be 5 years or more.
Make sure you have all the skills described under Recommended Minimum Skills and Experience.
Be prepared to use the non-searchable documentation during the exam, to help you with correct syntax.
Review command line solutions and be prepared to use them, even if you know how to do things in GUI. GUI is not available for every segment of the exam.
Take the time to get hands-on practice with all the exam objectives, especially on skills that you do not use regularly.
You must be able to translate high-level conceptual requirements into the specific commands and actions that are needed to execute them. This is where your years of experience and hands-on practice are especially vital to success on the exam.
To be an Oracle 10g certified master you have to pass the 2 day "Oracle Database 10g Administrator Certified Master Exam".