1. Which collection is best to insert values in inserstion order without any duplicates
2. String s1=”java”;
String s2=new String(“java”);
System.out.println(s1==s2);
System.out.println(s1.equals(s2));
What is the output and explain
3. how do you transform List<List<Integer>> to List<Integer> using java 8 ?
4. What is the output System.out.println(10+20+”Java”+10+20);
5. Take a map and sort the it based on values
6. Given a String, find the repeated character in it using Stream functions
7. final List<String> fruits=new ArrayList<>(); is this correct ?
8. Interface vs Functional Interface
9. Why optional
10. What is Spring Acctuators
11. How to configure Database in Spring project
12. Can we configure more than one DB in Spring project, if yes, How?
13. Put vs POST
14. @RestController vs @Controller
15. will finaly block execute if i give System.exit() in try block
16. How to perform Asysncronus operation in SpringBoot
17. How you handle 404 error in springboot
18. RestTemplate vs FiegnClient
19. What is offset in Kafka
20. can we modify final list
21. use of @cacheable annotation
22. How to implement JWT
23. What is multithreading and how any ways are there to create a thread.
24. Can we override static method
