Advanced
Java
Q93 / 100
What does the Sealed Classes feature (Java 17) restrict?
Correct! Well done.
Incorrect.
The correct answer is B) Which classes or interfaces may directly extend or implement a sealed type
B
Correct Answer
Which classes or interfaces may directly extend or implement a sealed type
Explanation
A sealed class uses permits to explicitly list subclasses. This enables exhaustive pattern matching and makes class hierarchies easier to reason about.
Progress
93/100