Oracle certification practice
Practise 1Z0-829 ACL questions covering standard vs extended ACLs, top-down processing, implicit deny, inbound vs outbound placement, and troubleshooting traffic that is unexpectedly blocked or permitted. Courseiva helps you prepare with realistic practice questions, topic-based revision, explained answers and structured study routes.
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Key facts for the Oracle Certified Professional Java SE 17 Developer 1Z0-829 exam.
Exam cost
$245 USD / ~£195
Duration
90 minutes
Question count
50 questions
Passing score
68%
Validity
Lifetime (no expiry)
Delivered by
Pearson VUE
Online proctored
Yes — available
Retake policy
100% free — no account required
Everything on Courseiva for 1Z0-829 is free — no subscription, no trial, no email wall.
Courseiva provides free Oracle Certified Professional Java SE 17 Developer 1Z0-829 (1Z0-829) practice questions with original exam-style questions, detailed explanations, topic-based practice, mock exams, readiness tracking, and study analytics. Courseiva is an independent platform and is not affiliated with Oracle.
14 days between attempts
Question formats
The Oracle Certified Professional Java SE 17 Developer (1Z0-829) is the premier certification for Java developers, validating deep knowledge of Java SE 17 language features, APIs, and object-oriented design principles. The exam covers records, sealed classes, pattern matching, text blocks, modules (JPMS), streams, lambdas, concurrency, generics, and I/O. It replaced the Java SE 11 OCP as the current professional-level Java credential and is recognized globally by enterprise software companies as proof of Java expertise. No associate-level exam is required as a prerequisite.
Official prerequisite
No formal prerequisites; Oracle removed the mandatory associate exam requirement for this version.
Recommended experience
1–3 years of professional Java development experience; solid understanding of OOP, Java SE APIs, and at least Java 8 features (streams, lambdas).
1–3 years of Java development experience with familiarity with Java 8+ features.
Should you skip this exam?
Complete beginners to Java programming or those who only use Java peripherally and do not need to prove language-level expertise.
Courseiva study tip
Write and compile code by hand daily — the exam includes tricky code-trace questions. Use Selikoff & Boyarsky's OCP Java 17 Study Guide and practice with mock exams extensively.
UK salary range
£50,000–£85,000
US salary range
$90,000–$140,000
Job roles that cite 1Z0-829
What certification to take next
The 1Z0-829 exam costs $245 USD per attempt when booked through Pearson VUE.
You need to score 68% or higher to pass the Oracle Certified Professional Java SE 17 Developer exam.
The exam has 50 questions with a 90-minute time limit. Questions include multiple choice, multiple response, and code analysis (reading and predicting output of code snippets).
The exam covers Java SE 17 features including records, sealed classes, pattern matching, text blocks, the Java Module System (JPMS), streams, functional interfaces, lambdas, concurrency, generics, I/O, and exception handling.
Yes, it is widely considered one of the harder programming certification exams. Code-trace questions require precise understanding of Java's execution model, operator precedence, and subtle API behaviour.
No. Oracle Java certifications do not expire — they are lifetime credentials, though they certify a specific Java version.
No. Oracle removed the mandatory prerequisite for the Java SE 17 OCP. You can register and sit 1Z0-829 directly without passing an associate-level exam.
See how 1Z0-829 stacks up against related certifications.
Practice modes
Choose a mode that matches your current study phase. Use topic practice early on and mock exams closer to your exam date.
All 1Z0-829 Questions
Browse the full question bank organised by domain and difficulty.
Practice Test
Start a session with detailed answer explanations after each question.
Mock Exam
Simulate the real exam with a timed, full-length question set.
Quick 10
A 10-question warm-up — ideal for a short daily study session.
Flashcards
Reinforce key terms, commands, and protocol facts with flashcards.
Domain Practice
Focus exclusively on one exam domain to target your weakest area.
50-Question Set
Mid-length practice set covering all domains.
Full-length Simulation
Full exam simulation matching the real question count.
Exam guide
Start with a short practice session, review each missed answer, then return to the topics that caused mistakes.
ACL questions usually test top-down rule processing, source and destination matching, protocol or port logic, and where the ACL should be applied.
Standard versus extended ACL behaviour.
Top-down processing and the implicit deny rule.
Source, destination, protocol and port matching.
Inbound versus outbound ACL placement.
Related practice questions
Use these internal links to move from the exam guide into focused topic practice pages.
Practise 1Z0-829 questions linked to Handling Date, Time, Text, Numeric and Boolean Values.
Practise 1Z0-829 questions linked to Controlling Program Flow.
Practise 1Z0-829 questions linked to Utilizing Java Object-Oriented Approach.
Practise 1Z0-829 questions linked to Handling Exceptions.
Practise 1Z0-829 questions linked to Working with Arrays and Collections.
Practise 1Z0-829 questions linked to Working with Streams and Lambda Expressions.
Practise 1Z0-829 questions linked to Java Platform Overview and Packaging.
Practise 1Z0-829 questions linked to Java I/O API and Securing Applications.
Practise 1Z0-829 questions linked to 1Z0-829 fundamentals.
Practise 1Z0-829 questions linked to 1Z0-829 scenario.
Practise 1Z0-829 questions linked to 1Z0-829 troubleshooting.
Practice directory
Every practice set is a unique selection of questions — numbered tests, domain-focused sessions, and topic-specific quizzes.
Showing 30 of 37 tests. See all 37 1Z0-829 practice tests →
Timed mode
Official blueprint
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Free study guide
The Courseiva 1Z0-829 study guide covers exam format, the official domain blueprint with weights, a structured study plan, and domain-specific tips for each section. Use it alongside practice questions to build both conceptual depth and exam confidence.
Sample questions
Select your answer before revealing the explanation. These questions are original exam-style — not copied from any exam or dump site.
Trap 1: Wrap the parse call in a synchronized block
Thread-safe but causes contention, reducing performance.
Trap 2: Use a ThreadLocal<SimpleDateFormat> to give each thread its own…
Works but is more complex and less performant than using DateTimeFormatter.
Trap 3: Create a new SimpleDateFormat instance for each parse call
Avoids thread safety but creates many objects, hurting performance.
Wrap the parse call in a synchronized block
Why wrong: Thread-safe but causes contention, reducing performance.
Use a ThreadLocal<SimpleDateFormat> to give each thread its own instance
Why wrong: Works but is more complex and less performant than using DateTimeFormatter.
Replace SimpleDateFormat with DateTimeFormatter.ISO_INSTANT and use Instant.from()
Thread-safe and correct for ISO 8601.
Create a new SimpleDateFormat instance for each parse call
Why wrong: Avoids thread safety but creates many objects, hurting performance.
Trap 1: Case values can be runtime expressions.
Case values must be compile-time constants.
Trap 2: A break statement is mandatory after each case block.
Break is optional; fall-through occurs without it.
Trap 3: Case labels can be variables if they are final and assigned a…
They must be compile-time constants, but final variables are allowed only if initialized with constant expressions.
The default case can be placed anywhere within the switch block.
Default can be at any position.
Case values can be runtime expressions.
Why wrong: Case values must be compile-time constants.
A break statement is mandatory after each case block.
Why wrong: Break is optional; fall-through occurs without it.
Case labels can be variables if they are final and assigned a constant expression.
Why wrong: They must be compile-time constants, but final variables are allowed only if initialized with constant expressions.
The switch statement can be used with int, char, String, and enum types.
These are valid types for switch.
Trap 1: The Collection.forEach() method is inherited from the Collection…
It is inherited from Iterable.
Trap 2: The Collection interface inherits the stream() method from the…
stream() is defined in Collection, not Iterable.
The Collection.forEach() method is inherited from the Collection interface.
Why wrong: It is inherited from Iterable.
The Stream.forEach() operation processes elements in the encounter order of the stream only for sequential streams.
Parallel streams may process elements out of order.
The Collection interface inherits the stream() method from the Iterable interface.
Why wrong: stream() is defined in Collection, not Iterable.
The Stream.toList() method returns an unmodifiable list.
Since Java 16.
The Iterator interface provides a default method forEachRemaining(Consumer<? super E> action).
Introduced in Java 8.
Trap 1: ArithmeticException
ArithmeticException is an unchecked exception.
Trap 2: ArrayIndexOutOfBoundsException
ArrayIndexOutOfBoundsException is an unchecked exception.
Trap 3: NullPointerException
NullPointerException is an unchecked exception.
SQLException
SQLException is a checked exception.
ArithmeticException
Why wrong: ArithmeticException is an unchecked exception.
ArrayIndexOutOfBoundsException
Why wrong: ArrayIndexOutOfBoundsException is an unchecked exception.
NullPointerException
Why wrong: NullPointerException is an unchecked exception.
IOException
IOException is a checked exception.
Trap 1: Comparator.comparing(Employee::getName,…
Sorts by name case-insensitive ascending, then age ascending - age should be descending.
Trap 2: Comparator.comparingInt(Employee::getAge).reversed().thenComparing(E…
Sorts by age descending first, then name - name should be primary key.
Trap 3: Comparator.comparing(Employee::getName).thenComparingInt(Employee::g…
Reverses entire comparator, so name descending, age descending - name should be ascending.
Comparator.comparing(Employee::getName, String.CASE_INSENSITIVE_ORDER).thenComparingInt(Employee::getAge)
Why wrong: Sorts by name case-insensitive ascending, then age ascending - age should be descending.
Comparator.comparing(Employee::getName, String.CASE_INSENSITIVE_ORDER).thenComparing(Comparator.comparingInt(Employee::getAge).reversed())
Correctly sorts by name case-insensitive ascending, then age descending.
Comparator.comparingInt(Employee::getAge).reversed().thenComparing(Employee::getName, String.CASE_INSENSITIVE_ORDER)
Why wrong: Sorts by age descending first, then name - name should be primary key.
Comparator.comparing(Employee::getName).thenComparingInt(Employee::getAge).reversed()
Why wrong: Reverses entire comparator, so name descending, age descending - name should be ascending.
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