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Free Oracle 1Z0-809 Actual Exam Questions

The questions for this exam were last updated on January 7, 2026

Dumps Box (DumpsBox) offers up-to-date practice exam questions for 1Z0-809 certification exam which are developed and validated by Oracle subject domain experts certified in Oracle 1Z0-809 . These practice questions are update regularly as we keep an eye on any recent changes in 1Z0-809 syllabus, and when there is update our team quickly adjusts the questions. This commitment to providing the best quality exam prep material to certification aspirants is what makes DumpsBox.com the best certification exam prep website. On top of that, our strong, yet strictly moderated, community based feedback keeps the content clean and current. Each question has helpful community discussion that provides it extra perspective and introduces helpful resources for better exam preparation. This also saves students from other outdated practice questions or illicit exam dumps that can have adverse affects on career. Browse through our Oracle 1Z0-809 exam questions and pass your exam on first try.

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Question No. 1
Given the code fragment:
1Z0-809 practice exam questions
What is the result?
Select one option, then reveal solution.
Question No. 2
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;
}
and the code fragment:
List stds = Arrays.asList(
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?
Select one option, then reveal solution.
Question No. 3
Given:
class Worker extends Thread {
CyclicBarrier cb;
public Worker(CyclicBarrier cb) { this.cb = cb; }
public void run () {
try {
cb.await();
System.out.println(“Worker…”);
} catch (Exception ex) { }
}
}
class Master implements Runnable { //line n1
public void run () {
System.out.println(“Master…”);
}
}
and the code fragment:
Master master = new Master();
//line n2
Worker worker = new Worker(cb);
worker.start();
You have been asked to ensure that the run methods of both the Worker and Master classes are
executed.
Which modification meets the requirement?
Select one option, then reveal solution.
Question No. 4
Given the code fragment:
Path file = Paths.get (“courses.txt”);
// line n1
Assume the courses.txt is accessible.
Which code fragment can be inserted at line n1 to enable the code to print the content of the
courses.txt file?
Select one option, then reveal solution.
Question No. 5
Given that /green.txt and /colors/yellow.txt are accessible, and the code fragment:
Path source = Paths.get(“/green.txt);
Path target = Paths.get(“/colors/yellow.txt);
Files.move(source, target, StandardCopyOption.ATOMIC_MOVE);
Files.delete(source);
Which statement is true?
Select one option, then reveal solution.
Question No. 6

Given the code fragment:

List<String> empDetails = Arrays.asList(“100, Robin, HR”,

“200, Mary, AdminServices”,

“101, Peter, HR”);

empDetails.stream()

.filter(s-> s.contains(“1”))

.sorted()

.forEach(System.out::println); //line n1

What is the result?

Select one option, then reveal solution.
Question No. 7
Given the code fragment:
List str = Arrays.asList (“my”, “pen”, “is”, “your’, “pen”);
Predicate test = s -> {
int i = 0;
boolean result = s.contains (“pen”);
System.out.print(i++) + “:”);
return result;
};
str.stream()
.filter(test)
.findFirst()
.ifPresent(System.out ::print);
What is the result?
Select one option, then reveal solution.
Question No. 8
Which two reasons should you use interfaces instead of abstract classes? (Choose two.)
Select all that apply, then reveal solution.
Question No. 9
Given:
public interface Moveable {
public default void walk (Integer distance) {System.out.println(“Walking”);)
public void run(Integer distance);
}
Which statement is true?
Select one option, then reveal solution.
Question No. 10
Given the code fragment:
1Z0-809 practice exam questions
What is the result?
Select one option, then reveal solution.
Question No. 11
Given the code fragment:
Stream> iStr= Stream.of (
Arrays.asList (“1”, “John”),
Arrays.asList (“2”, null)0;
Stream< nInSt = iStr.flatMapToInt ((x) -> x.stream ());
nInSt.forEach (System.out :: print);
What is the result?
Select one option, then reveal solution.
Question No. 12
Given the code fragment:
List values = Arrays.asList (1, 2, 3);
values.stream ()
.map(n -> n*2)//line n1
.peek(System.out::print)//line n2
.count();
What is the result?
Select one option, then reveal solution.
Question No. 13
Given the definition of the Emp class:
public class Emp
private String eName;
private Integer eAge;
Emp(String eN, Integer eA) {
this.eName = eN;
this.eAge = eA;
}
public Integer getEAge () {return eAge;}
public String getEName () {return eName;}
}
and code fragment:
Listli = Arrays.asList(new Emp(“Sam”, 20), New Emp(“John”, 60), New Emp(“Jim”, 51));
Predicate agVal = s -> s.getEAge() > 50;//line n1
li = li.stream().filter(agVal).collect(Collectors.toList());
Stream names = li.stream()map.(Emp::getEName);//line n2
names.forEach(n -> System.out.print(n + “ “));
What is the result?
Select one option, then reveal solution.
Question No. 14
Given the code fragment:
LocalDate valentinesDay =LocalDate.of(2015, Month.FEBRUARY, 14);
LocalDate nextYear = valentinesDay.plusYears(1);
nextYear.plusDays(15); //line n1
System.out.println(nextYear);
What is the result?
Select one option, then reveal solution.
Question No. 15
Given the code fragments:
public class Book implements Comparator {
String name;
double price;
public Book () {}
public Book(String name, double price) {
this.name = name;
this.price = price;
}
public int compare(Book b1, Book b2) {
return b1.name.compareTo(b2.name);
}
public String toString() {
return name + “:” + price;
}
}
and
Listbooks = Arrays.asList (new Book (“Beginning with Java”, 2), new book (“A
Guide to Java Tour”, 3));
Collections.sort(books, new Book());
System.out.print(books);
What is the result?
Select one option, then reveal solution.