Master Java Web Services and REST API with Spring Boot- Step 3: Introduction to JPA

The video tutorial introduces JPA and its role in solving object-relational mapping issues. It explains how JPA maps application classes to database tables using entities and relationships. The Entity Manager is highlighted for managing data operations, while JPQL and Criteria API are introduced for querying. The tutorial covers mapping annotations, relationships, and inheritance strategies, providing a big-picture overview of JPA's capabilities. Future steps will involve hands-on practice with these concepts.

What problem does JPA aim to solve in application development?

• User authentication

• Network security

• Data encryption

• Object-relational mapping

Which JPA feature allows you to manage entities and perform database operations?

• Database Connector

• SQL Executor

• Data Mapper

• Entity Manager

What is JPQL primarily used for in JPA?

• Encrypting data

• Querying databases using entities

• Managing user sessions

• Designing user interfaces

How can you map a class field to a database column using JPA?

• Using a SQL query

• Through a configuration file

• With an annotation like @Column

• By setting a column name in the database

Which annotation is used to establish a many-to-many relationship in JPA?

• @ManyToMany

• @Entity

• @OneToOne

• @JoinColumn

What strategy does JPA use for inheritance mapping when all subclasses are stored in one table?

• Separate schema

• Joined table

• Single table

• Table per class

What is the purpose of the discriminator column in JPA inheritance mapping?

• To encrypt data

• To identify the type of entity

• To store metadata

• To manage database connections