Q. What is a functional interface in Java?

  • (A) An interface with default methods only
  • (B) An interface with exactly one abstract method
  • (C) Any interface with static methods
  • (D) Any abstract class
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✅ Correct Answer: (B) An interface with exactly one abstract method
Explanation: A functional interface has exactly one abstract method, enabling it to be used with lambda expressions.

Published by Mr. Dubey ⭐ 104.94K Points at 22-Jul-2025 06:41 am in JAVA

Explanation by: Mr. Dubey
A functional interface has exactly one abstract method, enabling it to be used with lambda expressions.

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