Which certificate do you prefer to use in your work or professional activity?

In professional Java activities, the Oracle Certified Professional, Java SE Programmer (OCPJP) certificate is often used. This certificate confirms deep knowledge of the Java language and platform, which is useful for career growth and qualification confirmation. For beginners, the Oracle Certified Associate (OCA) certificate is also relevant, covering basic Java concepts.

Additionally, depending on the specialization, certificates related to associated technologies can be considered, such as Spring Professional if the work is related to this framework.