Master Hibernate and JPA with Spring Boot in 100 Steps - Step 13 - Entity Manager Methods-refresh

The video tutorial explores the use of the refresh method in the entity manager, contrasting it with the clear method. It demonstrates how the refresh method can be used to revert changes to an entity by fetching the current state from the database. The tutorial includes a step-by-step debugging process to illustrate the method's functionality and its impact on database operations. The video concludes with recommendations for further exploration through debugging.

What is the primary function of the refresh method in the entity manager?

• To clear all managed entities

• To detach an entity from the manager

• To update an entity with the latest database state

• To save changes to the database

Why is the clear method removed in the setup for the refresh example?

• To prevent database updates

• To avoid errors during execution

• Because it is redundant

• To ensure the entity manager still manages the entities

What happens to the changes made to an entity when the refresh method is called?

• They are temporarily stored

• They are merged with database values

• They are lost and replaced with database values

• They are saved to the database

During debugging, what indicates that the refresh method has been executed?

• The application crashes

• A select query is executed for the entity

• A new insert query is generated

• The console shows a clear command

What is the result of calling flush after a refresh if the entity data matches the database?

• The entity is saved again

• The entity is cleared

• The entity is detached

• No changes are saved

What is the purpose of setting a debug point during the refresh method execution?

• To observe the method's impact on the database

• To stop the application

• To clear the console

• To save the current state

What is the final state of course one after the refresh and flush operations?

• It has the updated name

• It retains the original database name

• It is merged with course two

• It is deleted from the database