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Last Updated: Aug 24, 2026
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Java 1Z0-809 Free Test is a test created to demonstrate all the features of our Java8 Professional Web Simulator. You will be able to access 25 full questions and will have 44 minutes to finish the test.
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Oracle 1z0-809 Korean Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Java Class Design | 15% | - Override hashCode, equals, and toString methods - Implement inheritance including visibility modifiers and composition - Use static keyword in blocks, variables, methods, classes - Implement encapsulation - Create singleton and immutable classes - Implement polymorphism |
| Topic 2: Java Stream API | 15% | - Work with Optional class - Describe Stream interface and pipeline - Filter, map, and process streams - Use terminal operations: collect, reduce, count |
| Topic 3: Java I/O and NIO.2 | 8% | - Stream operations on files - Read/write with java.io API - Use Path, Files, FileSystem API |
| Topic 4: Localization | 5% | - Work with resource bundles - Format numbers, dates, messages - Use Locale class |
| Topic 5: Exceptions and Assertions | 8% | - Use assertions - Create custom exceptions - Use try-with-resources - Use try-catch, multi-catch, finally |
| Topic 6: JDBC | 5% | - Connect to database - Execute queries and updates - Process resultsets |
| Topic 7: Java SE 8 Date/Time API | 7% | - Format and parse dates/times - Work with Period, Duration, time zones - Use LocalDate, LocalTime, LocalDateTime, Instant |
| Topic 8: Lambda Expressions and Functional Interfaces | 15% | - Create and use lambda expressions - Use primitive and binary variants of functional interfaces - Use method references - Use built-in functional interfaces: Predicate, Consumer, Function, Supplier |
| Topic 9: Generics and Collections | 15% | - Use Collections Framework: List, Set, Map, Queue - Sort and search collections - Analyze type safety and type erasure - Use generic classes, interfaces, and methods |
| Topic 10: Concurrency | 12% | - Create threads: Thread class, Runnable, ExecutorService - Use Executors, Callable, Future - Control thread lifecycle and synchronization - Use java.util.concurrent components |
| Topic 11: Advanced Java Class Design | 10% | - Use final keyword - Use enumerated types - Create inner classes: static, local, nested, anonymous - Use abstract classes and methods |
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