Scott SelikoffOCP Oracle Certified Professional Java SE 11 Developer Practice Tests: Exam 1Z0–819 and Upgrade Exam 1Z0–817

OCP Oracle Certified Professional Java SE 11 Developer Practice Tests: Exam 1Z0-819 and Upgrade Exam 1Z0-817

OCP Oracle Certified Professional Java SE 11 Developer Complete Study Guide: Exam 1Z0-815, Exam 1Z0-816, and Exam 1Z0-817