You can use this Oracle 1Z0-830 exam study guide to collect all the information about the Java SE 21 Developer Professional exam. The Oracle 1Z0-830 certification exam is mainly targeted to those candidates who have some experience or exposure to Oracle Java SE technology and want to flourish their career with Oracle Certified Professional Java SE 21 Developer credential.
The Oracle 1Z0-830 certification exam validates your understanding of the Oracle Java SE technology and sets the stage for your future progression. Your preparation plan for Java SE 21 Developer Professional Certification exam should include hands-on practice or on-the-job experience performing the tasks described in following certification exam syllabus topics.
Oracle 1Z0-830 Exam Details:
| Exam Name | Java SE 21 Developer Professional |
| Exam Code | 1Z0-830 |
| Exam Price | USD $245 (Pricing may vary by country or by localized currency) |
| Duration | 120 minutes |
| Number of Questions | 50 |
| Passing Score | 68% |
| Format | Multiple Choice Questions (MCQ) |
| Recommended Training | Java SE 21 Developer |
| Schedule Exam | Buy Oracle Training and Certification |
| Sample Questions | Oracle Certified Professional Java SE 21 Developer |
| Recommended Practice | 1Z0-830 Online Practice Exam |
Oracle 1Z0-830 Syllabus Topics:
| Handling Date, Time, Text, Numeric and Boolean Values |
- Use primitives and wrapper classes. Evaluate arithmetic and boolean expressions, using the Math API and by applying precedence rules, type conversions, and casting. - Manipulate text, including text blocks, using String and StringBuilder classes. - Manipulate date, time, duration, period, instant and time-zone objects including daylight saving time using Date-Time API. |
| Controlling Program Flow | - Create program flow control constructs including if/else, switch statements and expressions, loops, and break and continue statements. |
| Using Object-Oriented Concepts in Java |
- Declare and instantiate Java objects including nested class objects, and explain the object life-cycle including creation, reassigning references, and garbage collection. - Create classes and records, and define and use instance and static fields and methods, constructors, and instance and static initializers. - Implement overloaded methods, including var-arg methods. - Understand variable scopes, apply encapsulation, and create immutable objects. Use local variable type inference. - Implement inheritance, including abstract and sealed types as well as record classes. Override methods, including that of the Object class. Implement polymorphism and differentiate between object type and reference type. Perform reference type casting, identify object types using the instanceof operator, and pattern matching with the instanceof operator and the switch construct. - Create and use interfaces, identify functional interfaces, and utilize private, static, and default interface methods. - Create and use enum types with fields, methods, and constructors. |
| Handling Exceptions | - Handle exceptions using try/catch/finally, try-with-resources, and multi-catch blocks, including custom exceptions. |
| Working with Arrays and Collections | - Create arrays, List, Set, Map and Deque collections, and add, remove, update, retrieve and sort their elements. |
| Working with Streams and Lambda expressions |
- Use Java object and primitive Streams, including lambda expressions implementing functional interfaces, to create, filter, transform, process, and sort data. - Perform decomposition, concatenation, and reduction, and grouping and partitioning on sequential and parallel streams. |
| Packaging and Deploying Java Code |
- Define modules and expose module content, including that by reflection, and declare module dependencies, define services, providers, and consumers. - Compile Java code, create modular and non-modular jars, runtime images, and implement migration to modules using unnamed and automatic modules. |
| Managing Concurrent Code Execution |
- Create both platform and virtual threads. Use both Runnable and Callable objects, manage the thread lifecycle, and use different Executor services and concurrent API to run tasks. - Develop thread-safe code, using locking mechanisms and concurrent API. - Process Java collections concurrently and utilize parallel streams. |
| Using Java I/O API |
- Read and write console and file data using I/O streams. - Serialize and de-serialize Java objects. - Construct, traverse, create, read, and write Path objects and their properties using the java.nio.file API. |
| Implementing Localization | - Implement localization using locales and resource bundles. Parse and format messages, dates, times, and numbers, including currency and percentage values. |
The Oracle Java SE Developer Professional Certification Program certifies candidates on skills and knowledge related to Oracle Java SE products and technologies. The Oracle 1Z0-830 is granted based on a combination of passing exams, training, and performance-based assignments, depending on the level of certification. Java SE 21 Developer Professional certification is a real benchmark of experience and expertise that helps you stand out in a crowd among employers. To ensure success, Oracle recommends combining education courses, practice exams, and hands-on experience to prepare for your Oracle Certified Professional Java SE 21 Developer certification exam as questions will test your ability to apply the knowledge you have gained in hands-on practice or professional experience.