The Oracle Certified Professional (OCA / OCP) Database Administrator (DBA) certification is designed to reflect proficiency in Oracle database architecture, installation, administration, performance tuning and troubleshooting. A series of exams revolving around Oracle Database 11g must be passed in order to attain the current Oracle OCP DBA certification.
For the Oracle Certified Associate (OCA) certification students must take and pass the Oracle Database 11g: SQL Fundamentals (1Z0-051) and Oracle Database 11g: Administration I (1Z0-052) exams, and for the Oracle Certified Professional (OCA) certification students must additionally pass the Oracle Database 11g: Administration II (1Z0-053) exam.
Recommended Reading: Webopedia’s list of Computer Certifications for Students and IT Professionals.