Java SE 8 Programmer II (1Z0-809) Practice Exam

The Java SE 8 Programmer II (1Z0-809) is an advanced certification exam designed for individuals who have a thorough understanding of Java Standard Edition 8 (SE 8). This certification tests the ability to implement object-oriented programming concepts, use Java APIs for data structures, handle exceptions, work with Java streams, and apply functional programming principles. It is part of Oracle's certification path for Java developers and builds on the foundational knowledge covered in Java SE 8 Programmer I (1Z0-808).
Why is Java SE 8 Programmer II (1Z0-809) important?

• Demonstrates advanced proficiency in Java SE 8, a widely-used programming language.
• Validates the ability to apply object-oriented design principles in Java.
• Strengthens knowledge of Java APIs such as collections, streams, and concurrency.
• Ensures that candidates can work with lambda expressions and functional interfaces.
• Highlights mastery in exception handling, generics, and modular programming.
• Prepares individuals for senior-level Java development roles in the industry.
• Enhances employability by showcasing advanced Java programming skills.

Who should take the Java SE 8 Programmer II (1Z0-809) Exam?

• Java Developers
• Software Engineers
• Back-End Developers
• Full-Stack Developers
• Android Developers
• Software Architects
• System Engineers working with Java applications

Skills Evaluated

Candidates taking the certification exam on the Java SE 8 Programmer II (1Z0-809) is evaluated for the following skills:

• Advanced object-oriented programming concepts
• Use of Java collections, generics, and lambda expressions
• Implementing functional programming principles
• Working with streams and parallel streams for data processing
• Exception handling and custom exceptions
• Multithreading and concurrency management
• Using Java input/output (I/O) and file handling
• Knowledge of Java modularity, encapsulation, and access control
• Understanding of JDBC and database interaction with Java

Java SE 8 Programmer II (1Z0-809) Certification Course Outline
The Java SE 8 Programmer II (1Z0-809) Certification covers the following topics -

Module 1. Java Class Design

• Implement encapsulation

• Implement inheritance including visibility modifiers and composition

• Implement polymorphism

• Override hashCode, equals, and toString methods from Object class

• Create and use singleton classes and immutable classes

• Develop code that uses static keyword on initialize blocks, variables, methods, and classes

Module 2. Advanced Java Class Design

• Develop code that uses abstract classes and methods

• Develop code that uses the final keyword

• Create inner classes including static inner class, local class, nested class, and anonymous inner class

• Use enumerated types including methods, and constructors in an enum type

• Develop code that declares, implements and/or extends interfaces and use the @Override annotation.

• Create and use Lambda expressions

Module 3. Generics and Collections

• Create and use a generic class

• Create and use ArrayList, TreeSet, TreeMap, and ArrayDeque objects

• Use java.util.Comparator and java.lang.Comparable interfaces

• Collections Streams and Filters

• Iterate using forEach methods of Streams and List

• Describe Stream interface and Stream pipeline

• Filter a collection by using lambda expressions

• Use method references with Streams

Module 4. Lambda Built-in Functional Interfaces

• Use the built-in interfaces included in the java.util.function package such as Predicate, Consumer, Function, and Supplier

• Develop code that uses primitive versions of functional interfaces

• Develop code that uses binary versions of functional interfaces

• Develop code that uses the UnaryOperator interface

Module 5. Java Stream API

• Develop code to extract data from an object using peek() and map() methods including primitive versions of the map() method

• Search for data by using search methods of the Stream classes including findFirst, findAny, anyMatch, allMatch, noneMatch

• Develop code that uses the Optional class

• Develop code that uses Stream data methods and calculation methods

• Sort a collection using Stream API

• Save results to a collection using the collect method and group/partition data using the Collectors class

• Use flatMap() methods in the Stream API

Module 6. Exceptions and Assertions

• Use try-catch and throw statements

• Use catch, multi-catch, and finally clauses

• Use Autoclose resources with a try-with-resources statement

• Create custom exceptions and Auto-closeable resources

• Test invariants by using assertions

Module 7. Use Java SE 8 Date/Time API

• Create and manage date-based and time-based events including a combination of date and time into a single object using LocalDate, LocalTime, LocalDateTime, Instant, Period, and Duration

• Work with dates and times across timezones and manage changes resulting from daylight savings including Format date and times values

• Define and create and manage date-based and time-based events using Instant, Period, Duration, and TemporalUnit

Module 8. Java I/O Fundamentals

• Read and write data from the console

• Use BufferedReader, BufferedWriter, File, FileReader, FileWriter, FileInputStream, FileOutputStream, ObjectOutputStream, ObjectInputStream, and PrintWriter in the java.io package.

Module 9. Java File I/O (NIO.2)

• Use Path interface to operate on file and directory paths

• Use Files class to check, read, delete, copy, move, manage metadata of a file or directory

• Use Stream API with NIO.2

Module 10. Java Concurrency

• Create worker threads using Runnable, Callable and use an ExecutorService to concurrently execute tasks

• Identify potential threading problems among deadlock, starvation, livelock, and race conditions

• Use synchronized keyword and java.util.concurrent.atomic package to control the order of thread execution

• Use java.util.concurrent collections and classes including CyclicBarrier and CopyOnWriteArrayList

• Use parallel Fork/Join Framework

• Use parallel Streams including reduction, decomposition, merging processes, pipelines and performance.

Module 11. Building Database Applications with JDBC

• Describe the interfaces that make up the core of the JDBC API including the Driver, Connection, Statement, and ResultSet interfaces and their relationship to provider implementations

• Identify the components required to connect to a database using the DriverManager class including the JDBC URL

• Submit queries and read results from the database including creating statements, returning result sets, iterating through the results, and properly closing result sets, statements, and connections

Module 12. Localization

• Read and set the locale by using the Locale object

• Create and read a Properties file

• Build a resource bundle for each locale and load a resource bundle in an application