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Core Java Multiple Choice Questions And Answers

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21. The newly introduced Streams API is available in which package of java 8

  • java.io.streams
  • java.io.stream
  • java.util.streams
  • java.util.stream

22. Lambda expressions in java 8 are based on

  • Procedural programming
  • Functional programming
  • Data programming
  • All

23. In Java 8 Interfaces, methods can be:

  • default
  • abstract
  • all
  • none

24. Which method can be used to check null on an Optional variable in Java 8

  • isPresent()
  • isNullable()
  • isPresentable()
  • isNotNull()

25. Which of these does Stream map() operates on

  • Class
  • Interface
  • Predicate
  • Function