What is Hibernate questions and answers?
Hibernate Interview Questions
- 1) What is hibernate?
- 2) What is ORM?
- 3) Explain hibernate architecture?
- 5) Mention some of the advantages of using ORM over JDBC.
- 6) Define criteria in terms of Hibernate.
- 7) List some of the databases supported by Hibernate.
- 8) List the key components of Hibernate.
What is the core interface of Hibernate?
1-Session interface -this is the primary interface used by hibernate applications. The instance of this interface are lightweight and are inexpensive to create and destroy. Hibernate sessions are not thread-safe. 2-SessionFactory interface-this is a factory that delivers the session objects to hibernate application.
What is Cascade in Hibernate?
Tags:cascade | hibernate. Cascade is a convenient feature to save the lines of code needed to manage the state of the other side manually. The “Cascade” keyword is often appear on the collection mapping to manage the state of the collection automatically.
What are hibernate components?
Core components of Hibernate
- hibernate.cfg.xml: This file has database connection details.
- hbm. xml or Annotation: Defines the database table mapping with POJO.
- SessionFactory: There will be a session factory per database.
- Session: The Session object will get physical connection to the database.
Why Hibernate is called ORM?
Hibernate ORM (or simply Hibernate) is an object–relational mapping tool for the Java programming language. It provides a framework for mapping an object-oriented domain model to a relational database….Hibernate (framework)
| Developer(s) | Red Hat |
|---|---|
| Website | hibernate.org |
Why Hibernate is called lightweight?
Hibernate framework is open source and lightweight, A framework is called lightweight when it comes to size and transparency, the term lightweight is sometimes applied to a program, protocol, device, or anything that is relatively simpler or faster or that has fewer parts than something else.
How many types of cache are there in Hibernate?
There are mainly two types of caching: First Level Cache, and. Second Level Cache.
What is the difference between lazy and eager loading in Hibernate?
Eager Loading is a design pattern in which data initialization occurs on the spot. Lazy Loading is a design pattern that we use to defer initialization of an object as long as it’s possible.
What is Hibernate example?
Hibernate is an open-source object relational mapping tool for Java. It provides a framework for mapping an object-oriented domain model to a traditional relational database.
What is Hibernate life cycle?
There are three states or Life cycle of objects in Hibernate which are: Transient, Persistent and Detached.
How many layers are available in Hibernate?
four layers
The Hibernate architecture is categorized in four layers. This is the high level architecture of Hibernate with mapping file and configuration file. Hibernate framework uses many objects such as session factory, session, transaction etc.
What is Hql in Hibernate?
Hibernate Query Language (HQL) is an object-oriented query language, similar to SQL, but instead of operating on tables and columns, HQL works with persistent objects and their properties. HQL queries are translated by Hibernate into conventional SQL queries, which in turns perform action on database.