1Z0-809 Exam Questions & Answers
Java SE 8 Programmer II • Oracle
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About 1Z0-809 Exam
The 1Z0-809 Java SE 8 Programmer II certification exam is Oracle's advanced-level credential designed for experienced Java developers seeking to validate their expertise in core Java programming concepts and object-oriented design principles. This comprehensive exam covers essential topics including lambdas and streams, functional interfaces, exception handling, file I/O operations, concurrency, JDBC connectivity, and localization features specific to Java SE 8. Candidates must demonstrate proficiency in writing robust, efficient Java code and understanding advanced language features that enable modern application development. This certification serves as proof of professional competency and significantly enhances career prospects in competitive job markets.
Software developers, Java programmers, and IT professionals with intermediate to advanced Java knowledge should pursue the 1Z0-809 certification to advance their careers and increase earning potential. Successful preparation requires dedicated study combined with practical experience using updated exam dumps and comprehensive practice tests that simulate real exam scenarios. These resources help candidates identify knowledge gaps, reinforce difficult concepts, and build confidence before attempting the actual examination. By leveraging quality study materials and practice exams alongside hands-on coding experience, aspiring professionals can master the intricate aspects of Java SE 8 and achieve certification success more effectively.
Exam Topics & Objectives
4-Week Study Plan for 1Z0-809
Week 1: Object-Oriented Design Fundamentals
- Study Java Class Design: access modifiers, encapsulation, immutable objects, and method overloading
- Complete exercises on creating well-designed classes with proper getters/setters
- Study Advanced Java Class Design: inheritance, abstract classes, and interfaces
- Practice method overriding and polymorphism with code examples
- Review marker interfaces and sealed classes concepts
- Take practice quiz on class design principles (20 questions)
- Complete coding challenge: design a class hierarchy for a retail system
Week 2: Collections, Generics, and Functional Programming Basics
- Study Generics and Collections: type parameters, wildcards, and bounded types
- Master List, Set, Map, Queue interfaces and their implementations
- Complete exercises on generic method creation and type erasure
- Study Lambda Built-in Functional Interfaces: Functional, Consumer, Supplier, Predicate, Function
- Practice writing lambda expressions for different functional interfaces
- Study Java Stream API: creating streams, intermediate operations (filter, map, flatMap)
- Complete exercises on stream pipelines and terminal operations
- Take practice quiz on generics and lambda expressions (25 questions)
- Code challenge: refactor loops to use streams and lambdas
Week 3: Advanced I/O, Date/Time, and Exception Handling
- Study Exceptions and Assertions: try-catch-finally, try-with-resources, custom exceptions
- Practice multi-catch statements and exception handling best practices
- Study assertions: enabling/disabling and appropriate use cases
- Study Java SE 8 Date/Time API: LocalDate, LocalTime, LocalDateTime, ZonedDateTime
- Complete exercises on date manipulation, formatting, and parsing
- Study Java I/O Fundamentals: streams, readers, writers, and serialization
- Study Java File I/O (NIO.2): Path, Files, DirectoryStream, and file attributes
- Practice file operations: copying, moving, deleting, and reading directories
- Take practice quiz on I/O and Date/Time (20 questions)
- Code challenge: build a file processor using NIO.2 with exception handling
Week 4: Concurrency, JDBC, and Localization
- Study Java Concurrency: threads, Runnable, Thread lifecycle, synchronization
- Master concurrent collections and ExecutorService
- Practice thread safety and common concurrency issues
- Study Building Database Applications with JDBC: DriverManager, Connection, Statement, ResultSet
- Complete exercises on SQL execution, prepared statements, and batch processing
- Study Localization: ResourceBundle, Locale, message formatting, and number/currency formatting
- Practice creating and using resource bundles for different locales
- Take full-length practice exam (70+ questions covering all topics)
- Review and analyze incorrect answers from practice exams
- Complete final code challenges integrating streams, concurrency, and JDBC
- Review exam format and time management strategies
Sample 1Z0-809 Questions
Practice with real exam-style questions. Reveal answers to verify your knowledge.
Given the code fragment:
Stream
files.forEach (fName -> {//line n1
try {
Path aPath = fName.toAbsolutePath();//line n2
System.out.println(fName + '':''
+ Files.readAttributes(aPath, Basic.File.Attributes.class).creationTime
());
} catch (IOException ex) {
ex.printStackTrace();
});
What is the result?
Given the code fragments:
and
What is the result?
Given the code fragment:
Which should be inserted into line n1 to print Average = 2.5?
Given:
public class Canvas implements Drawable {
public void draw () { }
}
public abstract class Board extends Canvas { }
public class Paper extends Canvas {
protected void draw (int color) { }
}
public class Frame extends Canvas implements Drawable {
public void resize () { }
}
public interface Drawable {
public abstract void draw ();
}
Which statement is true?
Given:
public class Emp {
String fName;
String lName;
public Emp (String fn, String ln) {
fName = fn;
lName = ln;
}
public String getfName() { return fName; }
public String getlName() { return lName; }
}
and the code fragment:
List
new Emp (''John'', ''Smith''),
new Emp (''Peter'', ''Sam''),
new Emp (''Thomas'', ''Wale''));
emp.stream()
//line n1
.collect(Collectors.toList());
Which code fragment, when inserted at line n1, sorts the employees list in descending order of fName and then ascending order of lName?
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