ORACLE-JAVA-SE-25-DEVELOPER: Java SE 25 Developer Professional
Browse certifications
Exam Resources
Official learning paths, exam details, skills measured, and community resources to supplement your study.
About the Oracle Java SE 25 Developer Exam
Master the Oracle Certified Professional: Java SE 25 Developer exam (1Z0-831) — object-oriented programming with classes, records, sealed types, interfaces and enums; core language mechanics, text blocks and the Date-Time API; flow control with pattern-matching switch; exception handling and try-with-resources; the Java I/O and NIO.2 file APIs; arrays, collections, sequenced collections and generics; streams, lambdas and the new Stream Gatherers; concurrency with virtual threads, executors and scoped values; and the module system, compact source files, instance main methods and localization — all on the Java SE 25 LTS.
The complete practice exam for the Oracle Certified Professional: Java SE 25 Developer certification (exam 1Z0-831, aligned to the current Java SE 25 long-term-support release). Every question is a real Java code-tracing or API-behaviour scenario with a full explanation grounded in Java SE 25 semantics — including the newest language features from Java 22, 23, 24 and 25 (flexible constructor bodies, unnamed variables, sequenced collections, Stream Gatherers, module import declarations, compact source files with instance main methods, and scoped values).
Who Should Take This Exam?
The Oracle Java SE 25 Developer (1Z0-831) is designed for professional Java developers, back-end engineers, and Android/enterprise developers who write, read, and reason about production Java code. It is Oracle’s flagship developer credential and validates deep, hands-on command of the language and the core java.base libraries — so day-to-day Java programming experience is strongly recommended. There is no formal prerequisite, and it is the natural certification for developers moving to the Java 25 LTS from Java 17 or Java 21.
Prerequisites: None (working Java programming experience recommended)
Typical study time: 6-10 weeks of focused study and hands-on coding
Exam Quick Facts
| Detail | Value |
|---|---|
| Exam Code | 1Z0-831 |
| Title | Oracle Certified Professional: Java SE 25 Developer |
| Duration | 120 minutes |
| Questions | 50 |
| Pass Score | 68% |
| Cost | $245 USD |
| Provider | Oracle University / Pearson VUE (online proctored or test center) |
| Validity | Does not expire (no recertification required) |
| Prerequisites | None (working Java programming experience recommended) |
| Question Types | Multiple choice / multiple response |
| Official Page | View on Oracle → |
Exam Domains
The 1Z0-831 exam covers ten official objective groups, organised below into 7 study domains. Oracle does not publish per-domain percentage weights for the Java SE OCP exams — questions are spread across all objectives — so this practice bank mirrors the exam’s real emphasis, with the most questions on object-oriented programming and streams.
| Domain | Practice Qs |
|---|---|
| Applying Object-Oriented Principles in Java | 50 |
| Java Language Fundamentals: Types, Text, Date/Time & Flow Control | 40 |
| Processing Data Using Streams and Lambda Expressions | 38 |
| Implementing Concurrency and Multithreading | 34 |
| Exception Handling and Java I/O | 30 |
| Modules, Packaging, Deployment & Localization | 30 |
| Using Arrays, Collections & Generics | 28 |
| Total | 250 |
💡 Study tip: Object-oriented programming and streams and lambdas carry the most questions — make sure you can trace records, sealed types, overloading, and stream pipelines by hand. Don’t skip the Java 25 additions (flexible constructor bodies, module import declarations, compact source files with instance
main, scoped values, Stream Gatherers) — they are exactly what distinguishes the Java 25 exam from older Java 17/21 material.
Practice Exam — 250 Questions
Prepare for the 1Z0-831 with our 250-question practice exam covering all ten official objective groups. Every question presents a self-contained Java snippet or API scenario and includes a detailed explanation grounded in Java SE 25 semantics.
What you get:
- ✅ Exam simulation mode with timer
- ✅ Spaced repetition for weak areas
- ✅ Detailed explanations for every question
- ✅ Progress tracking across domains
- ✅ 20 free questions — no account needed
Oracle Certification Path
For Java developers, the Oracle Certified Professional: Java SE 25 Developer is Oracle’s flagship language credential. Oracle also offers a broad Oracle Cloud Infrastructure (OCI) track — start with OCI Foundations, then Architect Associate, and advance to Architect Professional and specialty tracks (Developer, Security, Networking, Data Science, Generative AI).
Related Oracle Certifications
If you’re studying for the Oracle Java SE 25 Developer, you might also be interested in these Oracle certifications:
- OCI-DEVELOPER-PROFESSIONAL: Cloud Infrastructure 2026 Developer Professional — 250 practice questions
- OCI-FOUNDATIONS: Cloud Infrastructure 2026 Foundations Associate — 250 practice questions
- OCI-AI-FOUNDATIONS: Cloud Infrastructure 2026 AI Foundations Associate — 250 practice questions
Study Tips
- Write and run code — the exam is code-centric, so compile and trace snippets yourself rather than only reading about features
- Use our practice exam — try the 20 free questions first to gauge your readiness
- Review explanations — don’t just check if you got it right; read why each answer is correct and what each distractor gets wrong
- Simulate exam conditions — use the timed exam mode to practise under pressure
- Check the official page — official exam details always have the latest objectives