Cognizant Interview questions | Java | Spring framework | Hibernate | Selected

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Please find below interview questions asked in cognizant interview for java developer position.

Cognizant Interview questions

1. Tell me about your project ?
2. What is difference between Hash set and Tree set ?
3. What is difference between Hash table and Hash map ?
4. How hash map work internally ?
5. What is difference between String , String Builder, String Buffer ?
6. What are the OPPS concepts in java?
7. Can we override private method in java ?
8. Explain the joins in database ?
9. What is Distinct in database ?
10. How mapping is done is hibernate?
11. If you changes database which thing need to update in configuration file ?
12. If you have 10K records then how will you fetch them to make this efficient?
13. How you are returning the jsp?
14. Which framework you have used for unit testing and deploying the code in your previous company ?
15. How you are handling the date to server?
16. How you are configuring column name in xml based configuration?
17. Which annotations you are using for primary and foreign key in hibernate?
18. How you are authenticating or validating different users in your project ?
19. What is singleton scope in spring and what are the ways to break this singleton behavior ?
20. What is DI in spring?
21. How spring MVC work and what is dispatcher servlet ?
22. Explain internal project structure.


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