Updated Mar 17, 2026 Verified 1z1-809 dumps Q&As - 100% Pass [Q23-Q47]

Updated Mar 17, 2026 Verified 1z1-809 dumps Q&As - 100% Pass

New 2026 Latest Questions 1z1-809 Dumps - Use Updated Oracle Exam

Oracle 1z0-809 exam is a challenging exam that requires a significant amount of preparation and study. Candidates are recommended to have at least two years of experience in Java programming before attempting 1z1-809 exam. However, passing 1z1-809 exam can provide numerous benefits, including increased job opportunities, higher salaries, and recognition as an expert in Java programming.

NEW QUESTION # 23
Given the code fragment:

Which statement can be inserted into line n1 to print 1,2; 1,10; 2,20;?

A. BiConsumer<Integer, Integer, Integer> c = (i, j) -> {System.out.print (i + ","
+ j+ "; ");};
B. BiFunction<Integer, Integer, String> c = (i, j) -> {System.out.print (i + "," + j+ "; ")};
C. BiConsumer<Integer, Integer, String> c = (i, j) -> {System.out.print (i + "," + j+ "; ")};
D. BiConsumer<Integer,Integer> c = (i, j) -> {System.out.print (i + "," + j+ ";
");};

Answer: B

NEW QUESTION # 24
Given: What is the result?

A. d
B. AnArrayIndexOutOfBoundsException is thrown at runtime.
C. A StringIndexOutOfBoundsException is thrown at runtime.
D. The program prints nothing
E. A NullPointerException is thrown at runtime.

Answer: C

NEW QUESTION # 25
Given the structure of the STUDENT table:
Student (id INTEGER, name VARCHAR)
Given:
public class Test {
static Connection newConnection =null;
public static Connection get DBConnection () throws SQLException {
try (Connection con = DriveManager.getConnection(URL, username,
password)) {
newConnection = con;
}
return newConnection;
}
public static void main (String [] args) throws SQLException {
get DBConnection ();
Statement st = newConnection.createStatement();
st.executeUpdate("INSERT INTO student VALUES (102, 'Kelvin')");
}
}
Assume that:
The required database driver is configured in the classpath.
The appropriate database is accessible with the URL, userName, and passWord exists.
The SQL query is valid.
What is the result?

A. A SQLExceptionis thrown as runtime.
B. The program executes successfully and the STUDENT table is updated with one record.
C. The program executes successfully and the STUDENT table is NOT updated with any record.
D. A NullPointerExceptionis thrown as runtime.

Answer: D

NEW QUESTION # 26
Given:

Which is refactored code with functional interfaces?

Answer: A

NEW QUESTION # 27
Given the code fragments:

What is the result?

A. RToo1 :: export
Too1 :: export
B. Compilation fails only at line n2.
C. Compilation fails only at line n1.
D. Compilation fails at both line n1 and line n2.
E. Too1 :: export
Too1 :: export

Answer: C

NEW QUESTION # 28
Given the code fragment:

What is the result?

A. 0
B. 1
C. A compilation error occurs at line n2.
D. A compilation error occurs at line n1.

Answer: A

NEW QUESTION # 29
Given:
class FuelNotAvailException extends Exception { }
class Vehicle {
void ride() throws FuelNotAvailException { //line n1
System.out.println(“Happy Journey!”);
}
}
class SolarVehicle extends Vehicle {
public void ride () throws Exception { //line n2
super ride ();
}
}
and the code fragment:
public static void main (String[] args) throws FuelNotAvailException, Exception
{
Vehicle v = new SolarVehicle ();
v.ride();
}
Which modification enables the code fragment to print Happy Journey!?

A. Replace line n1with public void ride() throws FuelNotAvailException {
B. Replace line n1with protected void ride() throws Exception {
C. Replace line n2with void ride() throws Exception {
D. Replace line n2with private void ride() throws FuelNotAvailException {

Answer: B

NEW QUESTION # 30
Given the code fragments:
class TechName {
String techName;
TechName (String techName) {
this.techName=techName;
}
}
and
List<TechName> tech = Arrays.asList (
new TechName("Java-"),
new TechName("Oracle DB-"),
new TechName("J2EE-")
);
Stream<TechName> stre = tech.stream();
//line n1
Which should be inserted at line n1 to print Java-Oracle DB-J2EE-?

A. stre.map(a-> a).forEachOrdered(System.out::print);
B. stre.forEach(System.out::print);
C. stre.map(a-> a.techName).forEach(System.out::print);
D. stre.forEachOrdered(System.out::print);

Answer: A

NEW QUESTION # 31
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 Ford
10124 BMW
B. A ClassCastExceptionis thrown at run time.
C. 10124 BMW
1 0123 Ford
D. A compilation error occurs.

Answer: C

NEW QUESTION # 32
Given the code fragments:
class Caller implements Callable<String> {
String str;
public Caller (String s) {this.str=s;}
public String call()throws Exception { return str.concat ("Caller");}
}
class Runner implements Runnable {
String str;
public Runner (String s) {this.str=s;}
public void run () { System.out.println (str.concat ("Runner"));}
}
and
public static void main (String[] args) InterruptedException, ExecutionException {
ExecutorService es = Executors.newFixedThreadPool(2);
Future f1 = es.submit (new Caller ("Call"));
Future f2 = es.submit (new Runner ("Run"));
String str1 = (String) f1.get();
String str2 = (String) f2.get();//line n1
System.out.println(str1+ ":" + str2);
}
What is the result?

A. The program prints:Run RunnerCall Caller : nullAnd the program does not terminate.
B. An Execution is thrown at run time.
C. A compilation error occurs at line n1.
D. The program terminates after printing:Run RunnerCall Caller : Run

Answer: A

NEW QUESTION # 33
Given the class definitions:

And the code fragment of the main() method,

What is the result?

A. Java
Java
Java
B. Java
Jeve
va
C. Compilation fails
D. Java
Jeve
ve

Answer: B

NEW QUESTION # 34
Given:

and the code fragment:

The threads t1and t2execute asynchronously and possibly prints ABCA or AACB.
You have been asked to modify the code to make the threads execute synchronously and prints ABC.
Which modification meets the requirement?

A. Replace line n2 with:
public synchronized void run () {
B. Replace line n2 with:
volatile int count = 0;
C. start the threads t1and t2within a synchronizedblock.
D. Replace line n1 with:
private synchronized int count = 0;

Answer: C

Explanation:
Explanation/Reference:

NEW QUESTION # 35
You have been asked to create a ResourceBundle which uses a properties file to localize an application.
Which code example specifies valid keys of menu1 and menu2 with values of File Menu and View Menu?

A. menu1, File Menu, menu2, View Menu
B. menu1 = File Menu menu2 = View Menu
C. <key>menu1</key><value>File Menu</value> <key>menu2</key><value>View Menu</value>
D. <key name = 'menu1">File Menu</key> <key name = 'menu2">View Menu</key>

Answer: C

NEW QUESTION # 36
Given the code fragment:

What is the result?

A. Found Teal
B. Found Red
Found Blue
Found Teal
Found Default
C. Found Red
Found Default
D. Found Red
Found Blue
Found Teal
E. Found Default

Answer: E

NEW QUESTION # 37
Given the content of /resourses/Message.properties:
welcome1="Good day!"
and given the code fragment:
Properties prop = new Properties ();
FileInputStream fis = new FileInputStream ("/resources/Message.properties"); prop.load(fis);
System.out.println(prop.getProperty("welcome1"));
System.out.println(prop.getProperty("welcome2", "Test"));//line n1
System.out.println(prop.getProperty("welcome3"));
What is the result?

A. Good day!
Test
null
B. Good day!
followed by an Exceptionstack trace
C. A compilation error occurs at line n1.
D. Good day!
Test
followed by an Exceptionstack trace

Answer: C

NEW QUESTION # 38
Given:
class ImageScanner implements AutoCloseable {
public void close () throws Exception {
System.out.print ("Scanner closed.");
}
public void scanImage () throws Exception {
System.out.print ("Scan.");
throw new Exception("Unable to scan.");
}
}
class ImagePrinter implements AutoCloseable {
public void close () throws Exception {
System.out.print ("Printer closed.");
}
public void printImage () {System.out.print("Print."); }
}
and this code fragment:
try (ImageScanner ir = new ImageScanner();
ImagePrinter iw = new ImagePrinter()) {
ir.scanImage();
iw.printImage();
} catch (Exception e) {
System.out.print(e.getMessage());
}
What is the result?

A. Scan.Unable to scan. Printer closed.
B. Scan. Unable to scan.
C. Scan.Scanner closed. Unable to scan.
D. Scan.Printer closed. Scanner closed. Unable to scan.

Answer: C

NEW QUESTION # 39
Given the code fragment:

Which two code fragments, when inserted at line n1 independently, result in the output PEEK: Unix?

A. .allMatch ();
B. .findAny ();
C. .anyMatch ();
D. .findFirst ();
E. .noneMatch ();

Answer: B,D

NEW QUESTION # 40
Given:

and the code fragment:

What is the result?

A. A compilation error occurs because the try block doesn't have a catch or finally block.
B. A compilation error occurs at line n2.
C. The program compiles successfully.
D. A compilation error occurs at line n1.

Answer: C

NEW QUESTION # 41
Given: What is the result?

A. Marrown NanRed JesOran
B. Marrown String out of limits Array out of limits
C. Marrown String out of limits
D. Marrown String out of limits JesOran

Answer: D

NEW QUESTION # 42
Assume customers.txt is accessible and contains multiple lines.
Which code fragment prints the contents of the customers.txt file?

A. Stream<String> lines = Files.lines (Paths.get ("customers.txt"));
lines.forEach( c) -> System.out.println(c));
B. Stream<String> stream = Files.find (Paths.get ("customers.txt"));
stream.forEach((String c) -> System.out.println(c));
C. Stream<Path> stream = Files.list (Paths.get ("customers.txt"));
stream.forEach( c) -> System.out.println(c));
D. Stream<Path> stream = Files.find (Paths.get ("customers.txt"));
stream.forEach( c) -> System.out.println(c));

Answer: B

NEW QUESTION # 43
Which statement is true about the single abstract method of the java.util.function.Function interface?

A. It accepts one argument and always produces a result of the same type as the argument.
B. It accepts one argument and returns boolean.
C. It accepts one argument and returns void.
D. It accepts an argument and produces a result of any data type.

Answer: A

Explanation:
Reference: http://winterbe.com/posts/2014/03/16/java-8-tutorial/ (functions)

NEW QUESTION # 44
Given:

What is the result?