Java SE 8 Programmer II (1Z0-809)

Exam Overview

The Oracle 1Z0-809: Java SE 8 Programmer II certification exam is designed for experienced Java developers seeking to validate their advanced knowledge of the Java SE 8 platform. This professional-level certification builds upon the foundational skills tested in the Java SE 8 Programmer I exam and focuses on more complex Java programming concepts, APIs, and development techniques.

Exam Information

This certification focuses on advanced Java SE 8 features including Lambda expressions, Stream API, concurrency, localization, and modular application development. The 1Z0-809 validates a programmer's ability to develop sophisticated applications using Java SE 8's advanced capabilities, demonstrating mastery of the language and its ecosystem.

Key Topics Covered

Advanced object-oriented principles
Lambda expressions and functional interfaces
Stream API for bulk data operations
Java file I/O (NIO.2)
Concurrency and multi-threading
Java Collections Framework
Building database applications with JDBC
Localization and resource bundles
Java annotations
Design patterns and principles
Exception handling and assertions

Target Audience

This exam is ideal for:

Experienced Java programmers
Software developers working with Java SE 8
Java application architects
Backend developers
Enterprise application developers
Java technology leads
Java educators and trainers

Exam Format

Multiple-choice and multiple-select questions
85 questions
Time limit: 150 minutes (2.5 hours)
Passing score: 65% (65 out of 100)
Proctored examination environment
Available in multiple languages

Skills Measured

Java Class Design (25%)

Implement encapsulation, inheritance, and polymorphism
Override methods, implement abstract classes and interfaces
Use instanceof and casting
Use virtual and default methods in interfaces
Develop code with static classes and nested classes

Advanced Java Class Design (20%)

Develop code that uses abstract classes and methods
Develop code that uses final keywords
Create inner, nested, and anonymous classes
Develop code that implements functional interfaces
Create and use Lambda expressions

Generics and Collections (15%)

Create and use generic classes and methods
Use wildcards in generic programming
Understand and use the Collections Framework
Filter collections using Lambda expressions
Use method references with streams

Lambda Built-in Functional Interfaces (15%)

Use built-in functional interfaces
Develop code using Function, Consumer, Predicate, and Supplier
Develop code using primitive stream interfaces
Develop code using binary versions of functional interfaces
Develop code using Unary operators

Java Stream API (15%)

Develop code using Stream APIs
Filter collections using lambda expressions
Use map, flatMap, and peek methods
Process streams using terminal operations
Save results using collectors and parallel streams

Exceptions and Assertions (10%)

Use try-with-resources construct
Create custom exceptions
Test invariants using assertions
Handle multiple exceptions and auto-closeable resources

Preparation Resources

Oracle University training courses
Official Java SE 8 documentation
Oracle Java Certification study guides
Practice tests and exam simulations
Advanced Java programming courses
Hands-on coding projects
Community forums and study groups