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OCP Java 21 Certification Exam Refresher: Study Notes for 1Z0-830
Last 1st September 2025 Build 1.1
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.
IMPORTANTThis book DOES NOT contain mock exams, quizzes, or exercises. It should be used as a compendium of information required to pass the exam.If you like the book, please post a review and purchase a PDF copy from enthuware.com/booksWe enhance the content of this eBook and publish it on Amazon frequently. The build number is updated upon each release. If the build number mentioned on the title page of your copy is older than the one mentioned here, please contact Amazon support to get the latest build on your device. You will then need to delete the book from your Kindle device and then redownload it.
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.
IMPORTANTThis book DOES NOT contain mock exams, quizzes, or exercises. It should be used as a compendium of information required to pass the exam.If you like the book, please post a review and purchase a PDF copy from enthuware.com/booksWe enhance the content of this eBook and publish it on Amazon frequently. The build number is updated upon each release. If the build number mentioned on the title page of your copy is older than the one mentioned here, please contact Amazon support to get the latest build on your device. You will then need to delete the book from your Kindle device and then redownload it.
306 pages, Kindle Edition
Published August 29, 2025
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