Java MCQs with answers Page - 480

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Q. Which functional interface accepts two arguments and returns a result?

  • (A) Function
  • (B) BiFunction
  • (C) Supplier
  • (D) Consumer

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Q. What is the main benefit of using functional interfaces in Java?

  • (A) Supports multiple inheritance
  • (B) Enables lambda expressions
  • (C) Allows method overloading
  • (D) Simplifies polymorphism

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Q. Which interface is marked as functional even though it has `default` methods?

  • (A) Comparable
  • (B) Runnable
  • (C) Predicate
  • (D) Consumer

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Q. Which functional interface method returns void?

  • (A) Supplier.get()
  • (B) Function.apply()
  • (C) Consumer.accept()
  • (D) Predicate.test()

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Q. In which Java version were functional interfaces introduced?

  • (A) Java 6
  • (B) Java 7
  • (C) Java 8
  • (D) Java 9

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Q. Which functional interface is preferred for computations that may fail with an exception?

  • (A) Supplier
  • (B) Runnable
  • (C) Callable
  • (D) Function

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