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1z0-809 Dumps 2026 - New Oracle 1z0-809 Exam Questions
Oracle 1z0-809 (Java SE 8 Programmer II) Certification Exam is designed to test the advanced Java programming skills of professionals who have already earned the Oracle Certified Associate (OCA) Java SE 8 Programmer certification. 1z0-809 exam covers a range of topics related to Java SE 8, including functional programming, concurrency, generics, collections, and streams. Successful completion of the exam demonstrates a thorough understanding of these topics and the ability to apply them in real-world programming situations.
NEW QUESTION # 63
Given that these files exist and are accessible:
and given the code fragment:
Which code fragment can be inserted at line n1to enable the code to print only /company/emp?
Stream<Path> stream = Files.list (Paths.get (“/company”));
- A. Stream<Path> stream = Files.find(
- B. Paths.get (“/company”), 1,
(p,b) –> b.isDirectory (), FileVisitOption.FOLLOW_LINKS); - C. Stream<Path> stream = Files.walk (Paths.get (“/company”));
- D. Stream<Path> stream = Files.list (Paths.get (“/company/emp”));
Answer: B
NEW QUESTION # 64
View the exhibit.
Given the code fragment:
Which change enables the code to print the following?
James age: 20
Williams age: 32
- A. Enclosing line 6 and line 7 within a try block and adding:
catch (missingInfoException e2) { //code goes here} catch (AgeOutofRangeException e3) {//code goes here} - B. Replacing line 5 with public static void main (String [] args) throws.Exception {
- C. Enclosing line 6 and line 7 within a try block and adding:
catch(Exception e1) { //code goes here}
catch (missingInfoException e2) { //code goes here} catch (AgeOutofRangeException e3) {//code goes here} - D. Replacing line 5 with public static void main (String [] args) throws MissingInfoException, AgeOutofRangeException {
Answer: B
NEW QUESTION # 65
Which two statements are true for a two-dimensional array of primitive data type?
- A. All methods of the class object may be invoked on the two-dimensional array.
- B. At the declaration time, the number of elements of the array in each dimension must be specified.
- C. The length of each dimension must be the same.
- D. It cannot contain elements of different types.
Answer: A,B
NEW QUESTION # 66
Given:
And given the code fragment:
- A. Compilation fails at both line n1 and line n2.
- B. null 0 Auto
4W 150 Manual - C. Compilation fails only at line n1.
- D. 4W 100 Auto
4W 150 Manual - E. Compilation fails only at line n2.
Answer: E
NEW QUESTION # 67
Which two statements are true about localizing an application?
- A. Support for new regional languages does not require recompilation of the code.
- B. Resource bundle files include data and currency information.
- C. Textual elements (messages and GUI labels) are hard-coded in the code.
- D. Language and region-specific programs are created using localized data.
- E. Language codes use lowercase letters and region codes use uppercase letters.
Answer: A,E
Explanation:
Reference: http://docs.oracle.com/javase/7/docs/technotes/guides/intl/
NEW QUESTION # 68
Given the code fragments:
and
What is the result?
France
- A. Optional [NotFound]
Optional[France] - B. Not Found
- C. Optional[NotFound]
Optional [France] - D. Not Found
France
Answer: B
NEW QUESTION # 69
A method is declared to take three arguments. A program calls this method and passes only two arguments. What is the results?
- A. The third argument is given the value null.
- B. The third argument is given the value void.
- C. The third argument is given the value zero.
- D. Compilation fails.
- E. The third argument is given the appropriate falsy value for its declared type. F) An exception occurs when the method attempts to access the third argument.
Answer: D
NEW QUESTION # 70
Given the Greetings.propertiesfile, containing:
and given:
What is the result?
- A. GOODBY_MSG
- B. Goodbye everyone!
- C. HELLO_MSG
- D. Compilation fails.
- E. Hello, everyone!
Answer: D
NEW QUESTION # 71
Given:
class Vehicle {
int vno;
String name;
public Vehicle (int vno, String name) {
this.vno = vno,;
this.name = name;
}
public String toString () {
return vno + ":" + name;
}
}
and this code fragment:
Set<Vehicle> vehicles = new TreeSet <> ();
vehicles.add(new Vehicle (10123, "Ford"));
vehicles.add(new Vehicle (10124, "BMW"));
System.out.println(vehicles);
What is the result?
- A. 10123 Ford10124 BMW
- B. 10124 BMW10123 Ford
- C. A compilation error occurs.
- D. A ClassCastException is thrown at run time.
Answer: D
NEW QUESTION # 72
Given:
What is the result?
- A. An exception is thrown at runtime.
- B. Compilation fails.
- C. int main 1
- D. String main 1
- E. Object main 1
Answer: D
NEW QUESTION # 73
Given the code fragment:
Which two modifications, when made independently, enable the code to print Joe:true:100.0?
- A. Option C
- B. Option A
- C. Option E
- D. Option B
- E. Option D
Answer: A,E
Explanation:
A is wrong because "Cannot use this. in a static context"
B is wrong because true is written in capital letters
E is wrong because "The constructor Employee(String, boolean, int) is undefined", there should be a parameterized constructor for class Employee
NEW QUESTION # 74
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<Path> listOfFiles = Files.walk(Paths.get("Java Projects")); 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?
- A. The program prints files names sequentially.
- B. A compilation error occurs at line n1.
- C. The program throws a runtime exception at line n2.
- D. The program prints files names concurrently.
Answer: D
NEW QUESTION # 75
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<Emp> emp = Arrays.asList (
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 fNameand then ascending order of lName?
- A. .sorted (Comparator.comparing(Emp::getfName).thenComparing(Emp::getlName))
- B. .map(Emp::getfName).sorted(Comparator.reserveOrder())
- C. .sorted (Comparator.comparing(Emp::getfName).reserved().thenComparing (Emp::getlName))
- D. .map(Emp::getfName).sorted(Comparator.reserveOrder().map
(Emp::getlName).reserved
Answer: C
NEW QUESTION # 76
Given:
and the code fragment:
Which definition of the ColorSorterclass sorts the blocks list?
- A.
- B.
- C.
- D.
Answer: D
NEW QUESTION # 77
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<Path> listOfFiles = Files.walk(Paths.get("Java Projects")); 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?
- A. The program prints files names sequentially.
- B. The program prints files names concurrently.
- C. A compilation error occurs at line n1.
- D. The program throws a runtime exception at line n2.
Answer: D
NEW QUESTION # 78
Which statement is true about the DriverManager class?
- A. It only queries metadata of the database.
- B. it is written by different vendors for their specific database.
- C. it executes SQL statements against the database.
- D. It returns an instance of Connection.
Answer: D
Explanation:
The DriverManager returns an instance of Doctrine\DBAL\Connection which is a wrapper around the underlying driver connection (which is often a PDO instance).
http://doctrine-dbal.readthedocs.org/en/latest/reference/configuration.html
NEW QUESTION # 79
Given the code fragment:
public class Foo {
public static void main (String [ ] args) {
Map<Integer, String> unsortMap = new HashMap< > ( );
unsortMap.put (10, "z");
unsortMap.put (5, "b");
unsortMap.put (1, "d");
unsortMap.put (7, "e");
unsortMap.put (50, "j");
Map<Integer, String> treeMap = new TreeMap <Integer, String> (new
Comparator<Integer> ( ) {
@Override public int compare (Integer o1, Integer o2) {return o2.compareTo (o2); } } ); treeMap.putAll (unsortMap); for (Map.Entry<Integer, String> entry : treeMap.entrySet () ) { System.out.print (entry.getValue () + " ");
}
}
}
What is the result?
- A. d b e z j
- B. j z e b d
- C. z b d e j
- D. A compilation error occurs.
Answer: C
NEW QUESTION # 80
Given the code fragment:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 81
Given:
class Vehicle {
int vno;
String name;
public Vehicle (int vno, String name) {
this.vno = vno,;
this.name = name;
}
public String toString () {
return vno + ":" + name;
}
}
and this code fragment:
Set<Vehicle> vehicles = new TreeSet <> ();
vehicles.add(new Vehicle (10123, "Ford"));
vehicles.add(new Vehicle (10124, "BMW"));
System.out.println(vehicles);
What is the result?
- A. 10124 BMW 10123 Ford
- B. A ClassCastException is thrown at run time.
- C. 10123 Ford 10124 BMW
- D. A compilation error occurs.
Answer: A
NEW QUESTION # 82
Given the content:
and the code fragment:
What is the result?
- A. The program prints nothing.
- B. username = Enter User Name
password = Enter Password - C. A compilation error occurs.
- D. username = Entrez le nom d'utilisateur
password = Entrez le mot de passe
Answer: D
NEW QUESTION # 83
......
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