The correct solution is to change the access modifier of getDetails() in Employee to public (or protected). This is because in Java, a method declared with default (package-private) access is not visible to subclasses in different packages, meaning Manager and Director cannot truly override it—their getDetails() methods are treated as entirely new methods, breaking polymorphic behavior. When printDetails(Employee e) calls e.getDetails(), it only sees the Employee version, which is why only name and ID print. On the Oracle Java Foundations 1Z0-811 exam, this tests your understanding of access modifiers and overriding, a common trap where default access silently prevents polymorphism across packages. Remember: overriding requires the parent method to be at least as accessible as the child method. Memory tip: “Default is dead across packages”—if you want subclasses in other packages to override, make it public or protected.
1Z0-811 Object-Oriented Programming Practice Question
This 1Z0-811 practice question tests your understanding of object-oriented programming. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A company develops a payroll system in Java with a hierarchy: Employee, Manager (extends Employee), and Director (extends Manager). Each class overrides a method getDetails() that returns a string with employee information. Employee's getDetails() returns name and ID. Manager's getDetails() adds department. Director's getDetails() adds division. The system uses a single method printDetails(Employee e) that calls e.getDetails(). After a recent deployment, the system prints only the name and ID for all employees, even for managers and directors. The code review reveals that Employee's getDetails() is declared with default (package-private) access, while the overridden versions in Manager and Director are public. The printDetails method and the Manager/Director classes are in different packages. What is the most likely cause and the correct solution?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Change the access modifier of getDetails() in Employee to public (or protected).
Option A is correct. In Java, a default-access method is not visible to subclasses in different packages, so Manager and Director cannot override it; their getDetails() methods are new methods, not overriding Employee's. Making Employee's getDetails() public (or protected) allows proper overriding and polymorphic behavior. Option B is wrong because it bypasses polymorphism. Option C is wrong because @Override only helps catch errors, but the access issue remains. Option D is wrong because making the method final would prevent overriding entirely.
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.
✓
Change the access modifier of getDetails() in Employee to public (or protected).
Why this is correct
A is correct: default access prevents overriding from different packages; changing to public enables proper polymorphism.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Modify printDetails() to accept Manager or Director objects instead of Employee.
Why it's wrong here
B is wrong: this breaks polymorphism and requires overloaded methods.
✗
Add @Override annotation to the overridden methods in Manager and Director.
Why it's wrong here
C is wrong: @Override only catches mistakes at compile time; it does not fix the access issue.
✗
Declare getDetails() in Employee as final to ensure consistent behavior.
Why it's wrong here
D is wrong: final prevents overriding, which is the opposite of the desired fix.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 1Z0-811 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 1Z0-811 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Object-Oriented Programming — This question tests Object-Oriented Programming — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Change the access modifier of getDetails() in Employee to public (or protected). — Option A is correct. In Java, a default-access method is not visible to subclasses in different packages, so Manager and Director cannot override it; their getDetails() methods are new methods, not overriding Employee's. Making Employee's getDetails() public (or protected) allows proper overriding and polymorphic behavior. Option B is wrong because it bypasses polymorphism. Option C is wrong because @Override only helps catch errors, but the access issue remains. Option D is wrong because making the method final would prevent overriding entirely.
What should I do if I get this 1Z0-811 question wrong?
Identify which 1Z0-811 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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