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OCP Oracle Certified Java SE 11 Developer Certification, or OCP 11 with code 1Z0-819 in 2021, is one of the prestigious certifications. The prestigious exam requires good knowledge of tricky topics like Modules and Concurrency but also you need to have speed and accuracy to solve all question on given time. Here are my recommended books, courses, and practice tests to prepare for the exam. The best books, course, course and practice test are available on Udemy.com.