I have seen on various forums people asking about what exams to need to do in order to achieve what certifications. This document is a guide for people aspiring to become Oracle certified plsql developers (associate and professional) as well as Oracle certified Administrators (associate and professional). Most of the data have been gathered from the Oracle site itself.
Oracle Certifications Guidelines_v2 2016-02-03
Different certification paths with exam codes and relevant syllabus documented in a powerpoint