Q. Which of these is NOT a valid functional interface in Java?

  • (A) Runnable
  • (B) Callable
  • (C) Comparator
  • (D) Thread
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✅ Correct Answer: (D) Thread
Explanation: Thread is a class, not a functional interface.

Published by Mr. Dubey ⭐ 111.42K Points at 21-Jul-2025 06:31 am in JAVA

Explanation by: Mr. Dubey
Thread is a class, not a functional interface.

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