OCP Java 21 Certification Exam Refresher: Study Notes for OCP Java 21 1Z0-830

This book is developed as "notes" for experienced Java Developers who are about to take the OCP Java SE 21 Developer certification exam (Exam code 1Z0-830).

If you are already good with Java programming and just need to brush up on the information required to pass the exam, this book is for you. This book does not explain the topics but just presents information as facts that you must remember for answering exam questions. If you are an experienced Java developer or have already learnt the topics required for the exam from another book or course, you can use this book to revise important points before the exam quickly.

Some topics such as Concurrency, Streams, Modules, Date API, and Internationalization are covered in detail because the exam contains tough questions on these topics and few developers use these topics at work regularly.

IMPORTANT

This book DOES NOT contain mock exams, quizzes, or exercises. It should be used as a compendium of information required to pass the exam.

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