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Updated: Sep 04, 2026
No. of Questions: 209 Questions & Answers with Testing Engine
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Oracle 1z0-809 Korean Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Localization | 5% | - Use Locale class - Format numbers, dates, messages - Work with resource bundles |
| Lambda Expressions and Functional Interfaces | 15% | - Use method references - Use primitive and binary variants of functional interfaces - Create and use lambda expressions - Use built-in functional interfaces: Predicate, Consumer, Function, Supplier |
| Java Class Design | 15% | - Override hashCode, equals, and toString methods - Implement encapsulation - Implement inheritance including visibility modifiers and composition - Implement polymorphism - Create singleton and immutable classes - Use static keyword in blocks, variables, methods, classes |
| Advanced Java Class Design | 10% | - Use abstract classes and methods - Use final keyword - Create inner classes: static, local, nested, anonymous - Use enumerated types |
| Java Stream API | 15% | - Describe Stream interface and pipeline - Filter, map, and process streams - Use terminal operations: collect, reduce, count - Work with Optional class |
| Java I/O and NIO.2 | 8% | - Use Path, Files, FileSystem API - Read/write with java.io API - Stream operations on files |
| Java SE 8 Date/Time API | 7% | - Format and parse dates/times - Use LocalDate, LocalTime, LocalDateTime, Instant - Work with Period, Duration, time zones |
| Concurrency | 12% | - Use Executors, Callable, Future - Use java.util.concurrent components - Create threads: Thread class, Runnable, ExecutorService - Control thread lifecycle and synchronization |
| Exceptions and Assertions | 8% | - Create custom exceptions - Use try-catch, multi-catch, finally - Use try-with-resources - Use assertions |
| Generics and Collections | 15% | - Sort and search collections - Use Collections Framework: List, Set, Map, Queue - Use generic classes, interfaces, and methods - Analyze type safety and type erasure |
| JDBC | 5% | - Execute queries and updates - Connect to database - Process resultsets |
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