Conclusion
Certified specialists in the field of Java development are highly valued by employers of large IT companies, so only those candidates who have proven their practical skills in using Java language by passing specialized Oracle exams can avoid serious competition and show their expertise. However, having the OCP Java SE 8 Programmer certificate will not only set you apart from other applicants but allow you to qualify for a higher salary.
So now that you see the benefits and are ready to continue on the path to Oracle certification, enroll for the Oracle 1Z0-809 exam and start preparing diligently. You have all the possibilities in your hands, it is enough to cast aside doubts and start studying hard to get ahead of the challenging job market.
Who should take the 1Z0-809 exam
The Oracle Java SE 8 Programmer II 1Z0-809 Exam certification is an internationally-recognized validation that identifies persons who earn it as possessing skilled as an Oracle Certified Java Programmer. If a candidate wants significant improvement in career growth needs enhanced knowledge, skills, and talents. The Oracle Java SE 8 Programmer II 1Z0-809 Exam certification provides proof of this advanced knowledge and skill. If a candidate has knowledge of associated technologies and skills that are required to pass Oracle Java SE 8 Programmer II 1Z0-809 Exam then he should take this exam.
The Oracle 1Z0-809 exam is intended for those individuals who want to get the Oracle Certified Professional, Java SE 8 Programmer certification. The potential candidates for this test are those IT specialists who have some years of experience with Java SE 8 platform and hold the Oracle Certified Associate, Java SE 8 Programmer credential.
The Oracle 1Z0-809 is a 150-minute test with 85 questions, that are mainly of a multiple-choice format, but there may also be other types, such as drag and drop, simulations, or scenario-based. This certification exam is available in the English language and the passing score for it is 65%. However, you need to try to get more than that.
Given that this exam is at the professional level of certification, candidates have a large amount of work to do. Therefore, the first thing that is recommended is to thoroughly review the complete list of topics available on the official exam page, which includes:
- Generics and Collections. This allows the candidate to create and use a generic class as well as ArrayList, TreeSet, TreeMap, and ArrayDeque objects.
- Advanced Class Design. Specifically, candidates must demonstrate skills in how to implement encapsulation, polymorphism, and inheritance.
- NIO.2, Path Interface, and Files Class.
- Stream API. It means the code development that uses optional class, Stream data, and calculation methods in addition to sorting a collection using Stream API.
- Localization. In particular how to read and set the locale by using the Locale object, to create and read a Properties file, and to build a recourse bundle for each locale.
- I/O Fundamentals. It means the skill of reading and writing data from the console.
- Exceptions and Assertions. In other words, how to use try-catch and throw statements, alongside creating custom exceptions and Auto-closeable resources.
- Java Concurrency. The candidates must be able to create worker threads, as well as to use parallel Fork/Join Framework and parallel Streams.
To apply for this Oracle certification test, you should first pay $245 for a voucher. After that, go to Pearson VUE and log into your account. Enter the exam code, which should be 1Z0-809, and follow the instructions that will pop up.
Oracle 1z0-809日本語 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Advanced Java Class Design | 10% | - Use enumerated types - Use abstract classes and methods - Create inner classes: static, local, nested, anonymous - Use final keyword |
| Java Class Design | 15% | - Implement encapsulation - Implement inheritance including visibility modifiers and composition - Implement polymorphism - Override hashCode, equals, and toString methods - Create singleton and immutable classes - Use static keyword in blocks, variables, methods, classes |
| Java I/O and NIO.2 | 8% | - Read/write with java.io API - Stream operations on files - Use Path, Files, FileSystem API |
| Exceptions and Assertions | 8% | - Use assertions - Use try-with-resources - Create custom exceptions - Use try-catch, multi-catch, finally |
| Localization | 5% | - Use Locale class - Format numbers, dates, messages - Work with resource bundles |
| JDBC | 5% | - Execute queries and updates - Process resultsets - Connect to database |
| Concurrency | 12% | - Use Executors, Callable, Future - Use java.util.concurrent components - Control thread lifecycle and synchronization - Create threads: Thread class, Runnable, ExecutorService |
| Java Stream API | 15% | - Work with Optional class - Filter, map, and process streams - Use terminal operations: collect, reduce, count - Describe Stream interface and pipeline |
| Generics and Collections | 15% | - Use generic classes, interfaces, and methods - Analyze type safety and type erasure - Use Collections Framework: List, Set, Map, Queue - Sort and search collections |
| Lambda Expressions and Functional Interfaces | 15% | - Use method references - Use built-in functional interfaces: Predicate, Consumer, Function, Supplier - Create and use lambda expressions - Use primitive and binary variants of functional interfaces |
| Java SE 8 Date/Time API | 7% | - Work with Period, Duration, time zones - Format and parse dates/times - Use LocalDate, LocalTime, LocalDateTime, Instant |
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