Jeanne Boyarsky and Scott Selikoff developed a complete study guides for all of the new Oracle Certified Professional (OCP), Java SE 21 Programmer 1Z0-830 exam. The book OCP Oracle Certified Professional Java SE 21 Developer Study Guide: Exam 1Z0-830 is published by Wiley Publishing.
We are using this blog to publish information about the book such as objectives changes and any errata found within the book. To report an error in the book that is not yet listed here, please create a thread in the OCP forum and include “Sybex OCP 21” or “Sybex 830” in the subject.
If you have any questions for us, feel free to post in the OCP forum at CodeRanch which Jeanne and Scott visit frequently.
Where to Buy It
Key Links
- Check the latest score/duration/objectives
- CertView (register for the test and check your score)
- Download Java 21 from Oracle
- GitHub repo for modules chapter
- How to access the online mock exams
Free Guides
- Guide: Using our OCP 21 Book for the Foundations Exam
- Guide: Using our Java 17 Practice Test Book for the Java 21 Exam
Signing up for the exam
- Part 1: Paying for the exam
- Part 2: Assigning the exam attempt
- Part 3: Scheduling the exam
Exam Details
- Title: 1Z0-830
- Length: 120 minutes
- Number of Questions: 50
- Passing Score: 68%
- Price: $245 (+tax depending on your location)
Errata
All known errors are listed here. To report a potential error, please create a thread at https://coderanch.com/f/24/java-programmer-OCPJP. Be sure to include “Sybex OCP 21” or “Sybex 830” and the chapter and/or page number in the subject.
| Page | Chapter | Error | Reporter | Confirmed |
|---|---|---|---|---|
| 24 | 1 | “You can’t refer to a variable before it has been defined” should be “”You can’t read a variable before it has been defined”” | Shareef Mostafa | 12/29/24 |
| 30 | 1 | “characters 0-9 along with A-Z. ” should be “”characters 0-9 along with A-F. “ | Amos Andrew Coates | 1/3/25 |
| 54 | 1 | #8 – give yourself credit if you chose E or F. The explanation counts the parameter value but doesn’t mention it. | João Lopes | 12/2/24 |
| 212 | 4 | In table 4.7, the first column of the second rows should say LocalTime to LocalDateTime | Satrya Fajri Pratama | 12/10/24 |
| 385 | 7 | The last sentence of the feature should be “clause” not “class” | Dirk Ulrich | 12/29/24 |
| 714 | 12 | /!module-info.class should be !/module-info.class | Tobias Zeiler | 11/3/24 |
| 721 | 12 | In figure The last two rows of table 12.10, should have main-class, not main class | João Lopes | 12/15/24 |
| 900 | 4 (explanation) | #15 – “before the second element” should be “after the second element” | Tobias Zeiler | 11/3/24 |
| 911 | 7 (Explanation) | #8 the first sentence should say not compatible with Walrus(List<String>) | João Lopes | 12/10/24 |