Master Hibernate and JPA with Spring Boot in 100 Steps - Step 06 - Writing a deleteByID Method to Delete an Entity

The video tutorial explains how to write a method to delete a course using Java's EntityManager. It covers the implementation of the delete method in a demo application and highlights the importance of transactions in data manipulation. The tutorial also discusses how Spring simplifies transaction management, ensuring data integrity by using annotations like @Transactional. The video concludes with a demonstration of running the application and verifying the deletion of a course.

What is the first step in deleting a course using the entity manager?

• Find the entity by ID

• Create a new course

• Directly remove the course

• Update the course details

Which method is used to remove a course in the entity manager?

• entityManager.persist()

• entityManager.merge()

• entityManager.refresh()

• entityManager.remove()

What is the role of the entity manager in course deletion?

• To create new courses

• To manage database connections

• To find and remove entities

• To update course details

What additional step is performed during the application startup?

• Creating a new course

• Adding more data to the database

• Removing all courses

• Updating course details

Why is transaction management important when deleting a course?

• To reduce memory usage

• To speed up the process

• To increase security

• To ensure data consistency

What does the @Transactional annotation in Spring ensure?

• Changes are rolled back if any step fails

• All changes are permanent

• Data is encrypted

• Transactions are ignored

What happens if a transaction fails during a course deletion?

• The transaction is retried

• All changes are rolled back

• The application crashes

• The course is partially deleted