Java 8 Interview Questions—Basic Level
1. What are the newly added features in Java 8?
2. Why was a new version of Java needed in the first place?
3. So, what actual advantages does Java 8 bring?
4. What are Lambda Expressions, and why are they used?
5. What is a functional interface?
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6. Did functional interfaces exist before Java? Or is it a new feature introduced in Java 8?
7. In addition to Predicate and BiPredicate, what is the distinction between Function and BiFunction?
8. What is the relationship between Lambda Expressions and functional interfaces?
9. Is it possible for users to develop a functional interface that is unique to them?
10. In the context of Java 8, what is the meaning of the term "method reference"?
Java 8 Interview Questions—Intermediate Level
11. What are the distinctions between streams and collections?
12. What is optional, and what is it most effective for?
13. What is the definition of type inference?
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14. Provide a list of a few Java 8 Date and Time APIs.
15. What is the necessity of default methods in the interface?
16. What is the purpose of the Java 8 StringJoiner class?
17. What is a default method, and when is it implemented?
18. In Java 8, what is jjs?
19. Which operations are undergoing reductions? List a few of the reducing operations that are available in the Java 8 streams.
20. What are the selection operations available in the Java 8 Stream API?
Java 8 Interview Questions—Experienced Level
21. What is Nashorn, and what are its benefits?
22. What is the definition of stream pipelining?
23. How do you print ten random numbers using forEach?
24. How do you get the highest number that exists on a list?
25. How do you get the second Friday of next month?
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