1Z0-829 Utilizing Java Object-Oriented Approach Practice Question
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.
Which TWO statements about Java interfaces are true? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Interfaces can contain static methods with a body.
Option C is correct because, since Java 8, interfaces can contain static methods with a body. These static methods belong to the interface itself and are not inherited by implementing classes, allowing utility methods to be defined directly within the interface.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
An interface can extend at most one other interface.
Why it's wrong here
An interface can extend multiple interfaces.
✗
Fields in an interface can be declared as protected.
Why it's wrong here
Interface fields are implicitly public static final; protected is not allowed.
✓
Interfaces can contain static methods with a body.
Why this is correct
Static methods in interfaces are allowed since Java 8.
Related concept
Read the scenario before looking for a memorised answer.
✓
Interfaces can contain private methods.
Why this is correct
Private methods are allowed since Java 9.
Related concept
Read the scenario before looking for a memorised answer.
✗
Default methods are used to prevent method overriding.
Why it's wrong here
Default methods provide a default implementation but can be overridden.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume interfaces follow the same single-inheritance rule as classes, or that static methods in interfaces cannot have a body, or that default methods prevent overriding, leading them to select incorrect options A, B, or E.
Detailed technical explanation
How to think about this question
Under the hood, static methods in interfaces are stored in the interface's own static context and are invoked via the interface name (e.g., MyInterface.staticMethod()), avoiding any ambiguity in multiple inheritance scenarios. Default methods, introduced to support backward compatibility when adding new methods to interfaces, use the 'virtual extension method' pattern and can be overridden; if a conflict arises from multiple interfaces, the implementing class must explicitly override the method. Private methods in interfaces (since Java 9) allow code reuse within the interface itself, reducing duplication in default and static methods while remaining inaccessible to implementing classes.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
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 — This question tests Utilizing Java Object-Oriented Approach — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Interfaces can contain static methods with a body. — Option C is correct because, since Java 8, interfaces can contain static methods with a body. These static methods belong to the interface itself and are not inherited by implementing classes, allowing utility methods to be defined directly within the interface.
What should I do if I get this 1Z0-829 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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