{"enrichment":{"faq":[{"a":"Java JPA Hibernate is an object-relational mapping (ORM) framework that maps Java objects to database tables automatically. It implements the Java Persistence API (JPA) standard, allowing developers to work with entities as regular Java objects while Hibernate handles SQL generation and database interactions. This abstraction simplifies data persistence and enables code to remain database-agnostic.","q":"What is Java JPA Hibernate and how does it work?"},{"a":"Java JPA Hibernate uses annotations like @Entity, @Table, @Column, and @Id to define the mapping between Java classes and database tables. Each entity class represents a table, properties map to columns, and relationships are defined with @OneToMany, @ManyToOne, and @ManyToMany annotations. 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The framework supports cascade operations, orphan deletion, and bidirectional relationship synchronization to maintain data integrity.","q":"How does Java JPA Hibernate handle entity relationships?"},{"a":"Java JPA Hibernate prevents N+1 query problems through eager loading with @Fetch(FetchMode.JOIN), batch fetching, or using JOIN FETCH in HQL queries. The Criteria API and Spring Data repositories also support fetch strategies. Proper relationship configuration, query optimization, and second-level caching further reduce unnecessary database round-trips in production applications.","q":"What are best practices for preventing N+1 queries in Hibernate?"},{"a":"Java JPA Hibernate manages transactions through EntityManager and session lifecycle configuration. Transactions can be declared via @Transactional annotations or programmatically. Session management handles connection pooling, lazy loading boundaries, and detached entity handling. 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