1Z0-811 Object-Oriented Programming Practice Question
A security-sensitive class should not be extended by any other class. Which modifier should be applied to the class declaration?
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
✓
final
The final modifier prevents a class from being subclassed, which is appropriate for security or design reasons.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
final
Why this is correct
Correct. A final class cannot be extended.
- ✗
abstract
Why it's wrong here
abstract is used to enforce inheritance, which is the opposite of preventing it.
- ✗
static
Why it's wrong here
static is used for inner classes or members, not to prevent inheritance.
- ✗
private
Why it's wrong here
private is not a valid class-level modifier for top-level classes; only inner classes can be private.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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