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Most Recent Oracle 1Z0-809 Exam Dumps
Prepare for the Oracle Java SE 8 Programmer II exam with our extensive collection of questions and answers. These practice Q&A are updated according to the latest syllabus, providing you with the tools needed to review and test your knowledge.
QA4Exam focus on the latest syllabus and exam objectives, our practice Q&A are designed to help you identify key topics and solidify your understanding. By focusing on the core curriculum, These Questions & Answers helps you cover all the essential topics, ensuring you're well-prepared for every section of the exam. Each question comes with a detailed explanation, offering valuable insights and helping you to learn from your mistakes. Whether you're looking to assess your progress or dive deeper into complex topics, our updated Q&A will provide the support you need to confidently approach the Oracle 1Z0-809 exam and achieve success.
The questions for 1Z0-809 were last updated on Apr 20, 2026.
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Given:
class Student {
String course, name, city;
public Student (String name, String course, String city) {
this.course = course; this.name = name; this.city = city;
}
public String toString() {
return course + '':'' + name + '':'' + city;
}
public String getCourse() {return course;}
public String getName() {return name;}
public String getCity() {return city;}
and the code fragment:
List
new Student (''Jessy'', ''Java ME'', ''Chicago''),
new Student (''Helen'', ''Java EE'', ''Houston''),
new Student (''Mark'', ''Java ME'', ''Chicago''));
stds.stream()
.collect(Collectors.groupingBy(Student::getCourse))
.forEach(src, res) -> System.out.println(scr));
What is the result?
Given the code fragment:
public class FileThread implements Runnable {
String fName;
public FileThread(String fName) { this.fName = fName; }
public void run () System.out.println(fName);}
public static void main (String[] args) throws IOException, InterruptedException {
ExecutorService executor = Executors.newCachedThreadPool();
Stream
listOfFiles.forEach(line -> {
executor.execute(new FileThread(line.getFileName().toString())); //
line n1
});
executor.shutdown();
executor.awaitTermination(5, TimeUnit.DAYS);//
line n2
}
}
The Java Projects directory exists and contains a list of files.
What is the result?
Given the code fragments:
class Employee {
Optional
address;Employee (Optional
address) {this.address = address;
}
public Optional
getAddress() { return address; }}
class Address {
String city = ''New York'';
public String getCity { return city: }
public String toString() {
return city;
}
}
and
Address address = new Address;
Optional
addrs1 = Optional.ofNullable (address);Employee e1 = new Employee (addrs1);
String eAddress = (addrs1.isPresent()) ? addrs1.get().getCity() : ''City Not
available'';
System.out.println(eAddress);
What is the result?
Which two statements are true about synchronization and locks? (Choose two.)
Given the code fragment:
public class Foo {
public static void main (String [ ] args) {
Map
unsortMap.put (10, ''z'');
unsortMap.put (5, ''b'');
unsortMap.put (1, ''d'');
unsortMap.put (7, ''e'');
unsortMap.put (50, ''j'');
Map
Comparator
@Override public int compare (Integer o1, Integer o2) {return o2.compareTo
(o2); } } );
treeMap.putAll (unsortMap);
for (Map.Entry
System.out.print (entry.getValue () + '' '');
}
}
}
What is the result?
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