This 1Z0-829 practice question tests your understanding of utilizing java object-oriented approach. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
abstract class Animal {
abstract void sound();
}
interface Pet {
default void play() { System.out.println("Playing"); }
}
class Dog extends Animal implements Pet {
void sound() { System.out.println("Bark"); }
}
public class Test {
public static void main(String[] args) {
Dog d = new Dog();
d.sound();
d.play();
}
}Refer to the exhibit. What is the result?
abstract class Animal {
abstract void sound();
}
interface Pet {
default void play() { System.out.println("Playing"); }
}
class Dog extends Animal implements Pet {
void sound() { System.out.println("Bark"); }
}
public class Test {
public static void main(String[] args) {
Dog d = new Dog();
d.sound();
d.play();
}
}Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Bark Playing
The code compiles and runs without error. The object referenced by a1 is a Dog instance. The code first calls the bark() method, which prints 'Bark' (defined in Dog). Then it calls the play() method, which is not overridden in Dog, so it invokes the inherited play() method from Animal, printing 'Playing'. Therefore, the output is 'Bark' followed by 'Playing', which matches option B.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Common exam traps
The trap here is that candidates may think the `play()` method must be overridden in `Dog` to be called, or that the output would be only 'Bark' because they overlook the inherited method call, leading them to choose option D.
Detailed technical explanation
In Java, when a method is called on an object, the actual runtime type determines which method is invoked (dynamic method dispatch). Here, `play()` is defined in `Animal` and not overridden in `Dog`, so the inherited version runs. The `bark()` method is specific to `Dog` and is accessible because the reference variable `a1` is of type `Dog`. This demonstrates that inherited methods are available to subclasses without explicit overriding, and that method resolution follows the object's actual class at runtime.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 1Z0-829 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Utilizing Java Object-Oriented Approach — study guide chapter
Learn the concepts, then practise the questions
Utilizing Java Object-Oriented Approach practice questions
Targeted practice on this topic area only
All 1Z0-829 questions
519 questions across all exam domains
Oracle Certified Professional Java SE 17 Developer 1Z0-829 study guide
Full concept coverage aligned to exam objectives
1Z0-829 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
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 this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Utilizing Java Object-Oriented Approach — This question tests Utilizing Java Object-Oriented Approach — Read the scenario before looking for a memorised answer..
The correct answer is: Bark Playing — The code compiles and runs without error. The object referenced by a1 is a Dog instance. The code first calls the bark() method, which prints 'Bark' (defined in Dog). Then it calls the play() method, which is not overridden in Dog, so it invokes the inherited play() method from Animal, printing 'Playing'. Therefore, the output is 'Bark' followed by 'Playing', which matches option B.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
Last reviewed: Jul 4, 2026
This 1Z0-829 practice question is part of Courseiva's free Oracle certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 1Z0-829 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.