Intermediate
Java
Q62 / 100
What is a functional interface?
Correct! Well done.
Incorrect.
The correct answer is B) An interface with exactly one abstract method, usable as a lambda target
B
Correct Answer
An interface with exactly one abstract method, usable as a lambda target
Explanation
A functional interface (annotated with @FunctionalInterface) has exactly one abstract method. Examples: Runnable, Callable, Comparator, and the java.util.function types.
Progress
62/100