TOP 20 INTERVIEW QUESTIONS ON JAVA 8 STREAMS
TOP 20 INTERVIEW QUESTIONS ON JAVA COLLECTIONS
Content:
1. What are Java 8 Streams? How do they differ from collections?
2. Explain the difference between Stream and ParallelStream. When would you
use each?
3. What is the difference between intermediate and terminal operations in a stream?
4. How does the filter() method work in Java Streams? Can you provide an
example?
5. What is the purpose of the map() function in streams? How does it differ from
flatMap()?
6. Can you explain the working of the reduce() method in streams with an
example?
7. What are collectors in Java Streams? Explain Collectors.toList() and
Collectors.toMap().
8. How does Stream.sorted() work? Can it sort in descending order?
9. What is the difference between findFirst() and findAny()?
10. Explain the forEach() method in streams. How is it different from a traditional
loop?
11. What is lazy evaluation in streams? How does it affect performance?
12. What is the purpose of peek() in streams? When should it be used?
13. What is the purpose of peek() in streams? When should it be used?
14. Can you convert a Stream back to a Collection? How?
15. What is the difference between anyMatch(), allMatch(), and noneMatch() in
streams?
16. Explain limit() and skip() methods in streams. How are they useful?
17. How can you concatenate two streams in Java 8?
18. What are parallel streams? How do you create one?
19. Explain short-circuiting operations in streams. Give an example.
20. What is the role of the distinct() method in streams?
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