hibernate FAQs

hibernate FAQs

• 1. What is the advantage of Hibernate over jdbc?
• 2. What is Hibernate?
• 3. What is ORM ?
• 4. Hat does ORM consists of ?
• 5. What are the ORM levels ?
• 6. Why do you need ORM tools like hibernate?
• 7. What Does Hibernate Simplify?
• 8. What is the main difference between Entity Beans and Hibernate ?
• 9. What are the Core interfaces and classes of Hibernate framework?
• 10. What is the general flow of Hibernate communication with RDBMS?
• 11. What is the need for Hibernate mapping file?
• 12. What are the important tags of hibernate.cfg.xml?
• 13. What role does the Session interface play in Hibernate?
• 14. What role does the SessionFactory interface play in Hibernate?
• 15. What are the most common ways to specify the Hibernate configuration properties?
• 16. How do you map Java Objects with Database tables?
• 17. How do you define sequence generated primary key algorithm in hibernate?
• 18. What is component mapping in Hibernate?
• 19. Difference between getCurrentSession() and openSession() in Hibernate ?
• 14. What are the types of Hibernate instance states ?
• 15. What are the types of inheritance models in Hibernate?
• 16. What is Hibernate Query Language (HQL)?
• 17. What are the ways to express joins in HQL?
• 18 .Transaction with plain JDBC in Hibernate ?
• 19 .What are the general considerations or best practices for defining your Hibernate persistent classes?
• 20 .Difference between session.update() and session.lock() in Hibernate ?
• 21. What are the Collection types in Hibernate ?
• 22. What is the difference between sorted and ordered collection in hibernate?
• 23. What do you mean by Named – SQL query?
• 24. How do you invoke Stored Procedures?
• 25. Explain Criteria API
• 26. What’s the difference between load() and get()?
• 27. What is the difference between and merge and update ?
• 28. Define cascade and inverse option in one-many mapping?
• 29. Define HibernateTemplate?
• 30. What are the benefits does HibernateTemplate provide?
• 31. How do you switch between relational databases without code changes?
• 32. If you want to see the Hibernate generated SQL statements on console, what should we do?
• 33. What are derived properties?
• 34. Define cascade and inverse option in one-many mapping?
• 35. Explain about transaction file?
• 36. Difference between session.save() , session.saveOrUpdate() and session.persist()?
• 37. Explain about the id field?
• 38. What is the use of dynamic-insert and dynamic-update attributes in a class mapping?
• 39. What is automatic dirty checking?
• 40. What are Callback interfaces?
• 41. What is Hibernate proxy?
• 42. How can Hibernate be configured to access an instance variable directly and not through a setter method ?
• 43. How can a whole class be mapped as immutable?
• 44. Explain about transparent persistence of Hibernate?
• 45. Explain about the dirty checking feature of Hibernate?
• 46. What is the effect when a transient mapped object is passed onto a Sessions save?
• 46. Explain about addClass function?
• 47. Explain about addjar() and addDirectory() methods?
• 48. What is lazy fetching in Hibernate? With Example .
• 49. How to Integrate Struts Spring Hibernate ?
• 50. How to prevent concurrent update in Hibernate?
• 51. What is version checking in Hibernate ?
• 52 . Explain about the dirty checking feature of Hibernate?
• 53 . What is the effect when a transient mapped object is passed onto a Sessions save?
• 54 . Explain about addClass function?