Oracle Java SE 21 Developer (1Z0-830)
14 practice exams
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About the 1Z0-830 practice exams
These 14 practice exams prepare you for the Oracle Java SE 21 Developer (1Z0-830) certification. Each one is a full-length, timed mock test of 50 questions in 120 minutes, so the set gives you 700 questions in all, and no question repeats from one exam to the next. Questions are drawn to match the weight of each 1Z0-830 exam domain, so the Using Object-Oriented Concepts in Java domain (18%) gets the most questions, as it does on the real exam.
| Certification | Oracle Java SE 21 Developer (1Z0-830) |
|---|---|
| Exam code | 1Z0-830 |
| Practice exams | 14 |
| Questions per exam | 50 (multiple choice and multiple select) |
| Time per exam | 120 minutes |
| Practice pass mark | 70% |
1Z0-830 exam domains and weights
- Domain 1: Using Object-Oriented Concepts in Java18%
- Domain 2: Working with Streams and Lambda expressions14%
- Domain 3: Handling Date, Time, Text, Numeric and Boolean Values12%
- Domain 4: Working with Arrays and Collections12%
- Domain 5: Controlling Program Flow10%
- Domain 6: Handling Exceptions8%
- Domain 7: Managing Concurrent Code Execution8%
- Domain 8: Packaging and Deploying Java Code6%
- Domain 9: Using Java I/O API6%
- Domain 10: Implementing Localization6%
What every 1Z0-830 practice exam includes
- A test-center style screen: one question at a time, a countdown clock, flag for review and a review screen before you submit.
- A score report broken down by the 10 1Z0-830 exam domains, so you can see where to study next.
- An explanation of every answer: the concept behind it, why the correct option is right, and why each other option is wrong.
- Your progress on all 14 exams, saved in your browser.
Read the official exam guide on the Oracle certification site for the full list of topics in each domain.