Q. What is the type of `x -> x.toUpperCase()` if x is a String?

  • (A) Predicate<String>
  • (B) Function<String, String>
  • (C) Consumer<String>
  • (D) Supplier<String>
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✅ Correct Answer: (B) Function<String, String>
Explanation: It takes a String input and returns a String output, which is a Function.

Published by Mr. Dubey ⭐ 111.42K Points at 21-Jul-2025 06:37 am in JAVA

Explanation by: Mr. Dubey
It takes a String input and returns a String output, which is a Function.

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