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Java Software Engineer Interview Questions
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Exception Handling
String concepts, Exception handling, core java related questions
What exactly static and final keywords, oops concept and explain springboot and microservices.
Day to Day activity as Java developer.
Technical Round: Q1. Explain the Spring Security. Q2. Explain the flow of a Rest API call from frontend to backend and response back to frontend. Q3. Explain JWT token. Q4. Define Filters and Segmentation in Spring Security. Q5. How one microservices authenticate another microservice with jwt? Q6. What is a functional interface? Q7. Give an example of a java interface which uses a functional interface. Q8. Write a code to implement Runnable using lambda. Q9. Which is springboot default server and How to use another server in srpingboot? Q10. What are profiles and how to use them? Q11. How is bean Injection working? Q12. How to inject a specific bean of the same object? Q13. How to set up a discovery server? Like Eureka Q14. What is the use of @Primary annotation? Q15. Which method can we use to check if a service is up or not? Q16. How would you externalize a microservice? Q17. What is the default port of springboot? Q18. What is an optional class and its use? Q19. Optional.Of() vs Optional.ofNullable() Q20. Write sql query to return 2nd highest salary. Q21. What is a Rest template?
Basic core Java Springboot annotation Micro service
2) I have a link list - of 13 nodes, I have variable M & N. You need to define M & N, 7th node your skip and delete the next nth node. M = 2, N = 1. Find the Nth node delete the nth node. Given the linked Ist and 2 integers m and n, the task is to traverse the linked list such that you skip m nodes then delete the next n nodes and continue the same till end of the linked list
Normal Tech question without coding
What is an abstract class?
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