1Z0-811 Object-Oriented Programming Practice Question
Which TWO of the following are valid benefits of using inheritance in Java? (Choose two.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Allows polymorphic behavior
Options B and C are correct. Inheritance promotes code reuse by allowing subclasses to reuse fields and methods from superclasses, reducing redundancy. It also enables polymorphic behavior through method overriding, allowing objects to be treated as instances of their parent class. Option A is incorrect because inheritance actually increases coupling between classes, which is generally considered a disadvantage, not a benefit. Option D is incorrect because encapsulation is enforced through access modifiers (private, protected, public), not inheritance. Option E is incorrect because inheritance can actually complicate debugging by introducing dependencies across classes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increases coupling between classes
Why it's wrong here
Coupling is a disadvantage, not a benefit.
- ✓
Allows polymorphic behavior
Why this is correct
Inheritance supports method overriding and runtime polymorphism.
- ✓
Promotes code reuse
Why this is correct
Subclasses can reuse superclass code.
- ✗
Enforces encapsulation
Why it's wrong here
Encapsulation is separate; inheritance can actually break encapsulation if not designed carefully.
- ✗
Simplifies debugging
Why it's wrong here
Inheritance can make debugging harder due to multiple levels.
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