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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:

• Java Concurrency. The candidates must be able to create worker threads, as well as to use parallel Fork/Join Framework and parallel Streams.
• Generics and Collections. This allows the candidate to create and use a generic class as well as ArrayList, TreeSet, TreeMap, and ArrayDeque objects.
• Exceptions and Assertions. In other words, how to use try-catch and throw statements, alongside creating custom exceptions and Auto-closeable resources.
• 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.
• Advanced Class Design. Specifically, candidates must demonstrate skills in how to implement encapsulation, polymorphism, and inheritance.
• 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.
• NIO.2, Path Interface, and Files Class.

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.

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Oracle 1z0-809 exam covers a wide range of topics, including Lambda expressions, Streams, NIO.2, JDBC, Annotations, and Concurrency. 1z1-809 exam also focuses on testing the developers' ability to write efficient and error-free code using these advanced features in Java SE 8. 1z1-809 exam is designed to be challenging and requires a thorough understanding of advanced Java programming concepts.

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Oracle 1z1-809 (Java SE 8 Programmer II) Certification Exam is a comprehensive exam that tests a candidate's knowledge of Java programming. 1z1-809 exam is designed for experienced Java developers who have already passed the Oracle Certified Associate (OCA) exam and have a solid understanding of the Java programming language. 1z1-809 exam covers a wide range of topics, including advanced Java concepts, database connectivity, and security.

Oracle 1z1-809 exam is a highly regarded certification that is recognized globally. It validates the skills and expertise of Java developers in advanced programming concepts such as collections, generics, lambda expressions, functional interfaces, and streams. Passing 1z1-809 exam demonstrates that the individual has the knowledge and skills necessary to develop complex Java applications.

Reference: https://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=5001&get_params=p_exam_id:1Z0-809

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