Oracle certification exams are divided into several levels, the following are a few of them: Junior Associate (OJA): This level is mainly for beginners and entry-level IT professionals, it is the lowest level of Oracle certification exams.Associate (OCA): This level is suitable for those who are familiar with Oracle technology, and Associate (OCA): This level is for professionals who are familiar with Oracle technology and want to become a certified database administrator or developer.Professional (OCP): This level is for IT professionals with higher skill levels and broader experience. It not only tests basic skills and knowledge, but also requires candidates to conduct in-depth research and practice with Oracle products.Expert (OCE): This level is the high level of Oracle certification exams and requires candidates to have a high level of skills and experience. It includes database administration, Java programming, Linux system administration and other specialized areas. master (OCM): This level is the highest level of Oracle certification exams, requiring candidates to have a very high level of skills and experience. It includes multiple areas of specialization such as Database Administration, Java Enterprise Architecture, and more. To get Oracle certification, candidates need to pass the respective exams and fulfill some other requirements such as practical experience and educational background. Candidates can find the relevant exam information and requirements and register for the respective exams on the official Oracle website. In order to successfully pass the certification exams, candidates need to have a solid technical foundation, sufficient practical experience and adequate preparation.