Hibernate (Optional)

Practice 25 Hibernate (Optional) interview questions with detailed answers. Part of the Hibernate track on Java Interview Hub.

• What is Hibernate?
• What are the core components of Hibernate?
• Explain the role of the SessionFactory in Hibernate.
• What is a Session in Hibernate?
• How does Hibernate manage transactions?
• What is HQL (Hibernate Query Language)?
• What is the Criteria API in Hibernate?
• Explain the concept of Object States in Hibernate.
• What is the purpose of the Configuration class in Hibernate?
• Describe the Second Level Cache in Hibernate.
• What are the differences between get() and load() methods in Hibernate?
• How does Hibernate ensure data integrity?
• What is the N+1 SELECT problem in Hibernate? How can it be prevented?
• Explain the role of the @Entity annotation in Hibernate.
• What is cascading in Hibernate?
• What is a Composite Key in Hibernate?
• How does Hibernate handle SQL Injection?
• What is Lazy Loading in Hibernate?
• How can you achieve concurrency in Hibernate?
• What is an optimistic locking in Hibernate?
• You have noticed that your Hibernate application is running slowly when fetching data from a database with many relationships. What strategy could you use to improve performance?
• How do you handle a Hibernate session in a web application to ensure that it is properly closed, avoiding memory leaks?
• During a transaction, an error occurs after several database operations have been successfully executed. How does Hibernate ensure data integrity in this situation?
• You need to add auditing features to track changes in entity data. What Hibernate feature would you use to achieve this?
• You are working with a legacy database where the table and column names do not follow your standard naming conventions. How can you map these tables without modifying the existing database schema?