Weekend Sale 70% Discount Offer - Ends in 0d 00h 00m 00s - Coupon code: save70

1z0-830 Exam Dumps : Java SE 21 Developer Professional

PDF
1z0-830 pdf
 Real Exam Questions and Answer
 Last Update: Jul 5, 2025
 Question and Answers: 84 With Explanation
 Compatible with all Devices
 Printable Format
 100% Pass Guaranteed
$27  $90
1z0-830 exam
PDF + Testing Engine
1z0-830 PDF + engine
 Both PDF & Practice Software
 Last Update: Jul 5, 2025
 Question and Answers: 84
 Discount Offer
 Download Free Demo
 24/7 Customer Support
$42  $140
Testing Engine
1z0-830 Engine
 Desktop Based Application
 Last Update: Jul 5, 2025
 Question and Answers: 84
 Create Multiple Test Sets
 Questions Regularly Updated
  90 Days Free Updates
  Windows and Mac Compatible
$31.5  $105

Verified By IT Certified Experts

CertsTopics.com Certified Safe Files

Up-To-Date Exam Study Material

99.5% High Success Pass Rate

100% Accurate Answers

Instant Downloads

Exam Questions And Answers PDF

Try Demo Before You Buy

Certification Exams with Helpful Questions And Answers

Oracle 1z0-830 Exam Dumps FAQs

Q. # 1: What is the Oracle 1z0-830 Exam?

The Oracle 1z0-830 Exam, also known as the Java SE 21 Developer Professional certification exam, is designed to validate a candidate's expertise in Java programming and the latest features of Java SE 21. It is a globally recognized certification offered by Oracle.

Q. # 2: Who is the target audience for the Oracle 1z0-830 Exam?

The Oracle 1z0-830 exam is ideal for Java developers, software engineers, and IT professionals aiming to enhance their credentials and demonstrate proficiency in Java SE 21.

Q. # 3: What topics are included in the Oracle 1z0-830 Exam?

The Oracle 1z0-830 exam covers a wide range of topics, including Java programming fundamentals, object-oriented principles, exception handling, Java APIs, and modern Java features like modules and streams.

Q. # 4: How many questions are there in the Oracle 1z0-830 Exam?

The Oracle 1z0-830 exam consists of 50 multiple-choice questions.

Q. # 5: What is the duration of the Oracle 1z0-830 Exam?

The Oracle 1z0-830 exam duration is 120 minutes.

Q. # 6: What is the passing score for the Oracle 1z0-830 Exam?

To pass the Oracle 1z0-830 exam, candidates must achieve a minimum score of 68%.

Q. # 7: What is the difference between Oracle 1z0-830 and 1z0-811 Exams?

The Oracle 1z0-830 and 1z0-811 exams cater to different levels of expertise and purposes in Java certification:

  • Oracle 1z0-830 Exam: The Oracle 1z0-830 Exam targets professional-level Java developers seeking to validate their expertise in Java SE 21. It delves into advanced topics like modules, streams, and the latest features of modern Java, requiring a deeper understanding of programming practices.
  • Oracle 1z0-811 Exam: The Oracle 1z0-811 Exam focuses on foundational knowledge of Java programming, making it ideal for beginners. It emphasizes basic concepts such as Java syntax, problem-solving skills, and programming fundamentals to help learners establish a strong base in Java development.

Q. # 8: How can CertsTopics help me prepare for the Oracle 1z0-830 Exam?

CertsTopics offers comprehensive 1z0-830 PDF dumps, practice tests, and questions and answers, to help you prepare effectively and guarantee success.

Q. # 9: Are the 1z0-830 study materials on CertsTopics updated regularly?

Yes, all 1z0-830 study materials are updated to reflect the latest exam syllabus and trends, ensuring you have access to the most relevant content.

Q. # 10: Can I access CertsTopics 1z0-830 exam dumps on multiple devices?

Yes, CertsTopics 1z0-830 exam dumps are compatible with various devices, allowing you to study anytime, anywhere.

Java SE 21 Developer Professional Questions and Answers

Question 1

Given:

java

public class Test {

public static void main(String[] args) throws IOException {

Path p1 = Path.of("f1.txt");

Path p2 = Path.of("f2.txt");

Files.move(p1, p2);

Files.delete(p1);

}

}

In which case does the given program throw an exception?

Options:

A.

Neither files f1.txt nor f2.txt exist

B.

Both files f1.txt and f2.txt exist

C.

An exception is always thrown

D.

File f2.txt exists while file f1.txt doesn't

E.

File f1.txt exists while file f2.txt doesn't

Buy Now
Question 2

Given:

java

public class Test {

static int count;

synchronized Test() {

count++;

}

public static void main(String[] args) throws InterruptedException {

Runnable task = Test::new;

Thread t1 = new Thread(task);

Thread t2 = new Thread(task);

t1.start();

t2.start();

t1.join();

t2.join();

System.out.println(count);

}

}

What is the given program's output?

Options:

A.

It's either 1 or 2

B.

It's either 0 or 1

C.

It's always 2

D.

It's always 1

E.

Compilation fails

Question 3

Given:

java

interface Calculable {

long calculate(int i);

}

public class Test {

public static void main(String[] args) {

Calculable c1 = i -> i + 1; // Line 1

Calculable c2 = i -> Long.valueOf(i); // Line 2

Calculable c3 = i -> { throw new ArithmeticException(); }; // Line 3

}

}

Which lines fail to compile?

Options:

A.

Line 1 and line 3

B.

Line 2 only

C.

Line 1 only

D.

Line 1 and line 2

E.

Line 2 and line 3

F.

Line 3 only

G.

The program successfully compiles