Java Programming for Complete Beginners - Java 16 - Step 04 - Mapping Course Entity and Populating Data with data sql

The video tutorial explains how to use JPA to map Java entities to database tables without writing queries. It covers the use of annotations like @Entity and @Id, and demonstrates how Spring Boot's autoconfiguration creates tables in an in-memory database. The tutorial also shows how to customize table and column names and insert default data using a data.sql file. Finally, it sets the stage for building an API around the data.

What is the primary purpose of using JPA in Java applications?

• To map Java objects to database tables

• To handle user authentication

• To configure server settings

• To manually write SQL queries

Which annotation is used to define a primary key in a JPA entity?

• @Key

• @PrimaryKey

• @Id

• @Entity

How does Spring Boot handle table creation in an in-memory database?

• It does not support in-memory databases

• It uses predefined templates

• It requires manual SQL scripts

• It automatically creates tables based on entity definitions

What happens when you change the entity name using the @Entity annotation?

• The database table name remains unchanged

• The entity is ignored during table creation

• The database table is renamed to match the new entity name

• The application throws an error

Which annotation allows you to customize column names in a JPA entity?

• @Name

• @Field

• @Table

• @Column

What is the purpose of the data.sql file in a Spring Boot application?

• To manage user sessions

• To insert default data into the database

• To define entity relationships

• To configure application properties

What error might you encounter if the data.sql file is empty?

• The database will be deleted

• A script must not be null or empty error

• The application will not start

• The application will ignore the file