Oracle 1z0-830 Exam Details & Actual Exam Questions
- Exam Code/Number: 1z0-830
- Exam Name/Title: Java SE 21 Developer Professional
- Certification Provider: Oracle
- Corresponding Certification: Java SE
- Exam Questions: 85
- Updated On: Sep,25 2026
- Certification Level: Professional
Oracle Java SE 21 Developer Professional Exam Questions
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(43 Up Votes)Oracle 1z0-830 Exam Overview:
| Certification Vendor: | Oracle |
|---|---|
| Exam Name: | Java SE 21 Developer Professional |
| Exam Number: | 1Z0-830 |
| Exam Price: | $245 USD |
| Exam Duration: | 120 minutes |
| Available Languages: | English |
| Exam Format: | Multiple Choice |
| Related Certifications: | Oracle Certified Professional: Java SE 21 Developer |
| Real Exam Qty: | 50 |
| Passing Score: | 68% |
| Sample Questions: | Oracle 1z0-830 Sample Questions |
| Exam Way: | Online proctored exam or in-person at Pearson VUE testing centers. |
| Pre Condition: | No mandatory prerequisite certification. Recommended experience with Java programming and modern Java SE features. |
| Official Syllabus URL: | https://education.oracle.com/java-se-21-developer-professional/pexam_1Z0-830 |
Oracle 1z0-830 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Handling Date, Time, Text, Numeric and Boolean Values | - Use String, StringBuilder, and related APIs - Work with primitive wrappers and number formatting - Use date, time, duration, period, and localization APIs |
| Java I/O and NIO | - Process file system resources - Use Path, Files, and related APIs - Read and write files |
| Controlling Program Flow | - Apply decision statements and loops - Work with records and sealed classes - Use switch expressions and pattern matching |
| Collections and Generics | - Apply generics and bounded types - Use List, Set, Map, Queue, and Deque implementations - Use sequenced collections and maps |
| Java Concurrency | - Work with concurrent collections and executors - Create and manage threads - Use virtual threads |
| Modules and Packaging | - Create and use Java modules - Package and deploy applications - Manage dependencies and exports |
| Exception Handling | - Create custom exceptions - Handle checked and unchecked exceptions - Use try-with-resources |
| Functional Programming | - Process data using Stream API - Work with functional interfaces - Use lambda expressions and method references |
| Object-Oriented Programming | - Apply inheritance and polymorphism - Implement encapsulation and abstraction - Create and use classes, interfaces, enums, and records |
| Annotations and JDBC | - Execute SQL operations and process results - Connect to databases using JDBC - Use built-in and custom annotations |
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