Gaining the Oracle Certified Associate (OCA) credential is the first step, followed by the Oracle Certified Professional (OCP) credential, in demonstrating you have the high-level skills required to be successful You signed in with another tab or window. You switched accounts on another tab or window From the basic to the advanced, this guide walks you through everything you need to know to confidently take the OCP 1Z Exam and upgrade exams 1Z and 1Z Javarepresents the biggest changes to the lan