Latest hibernate interview questions code#
Hibernate’s code is database independent because you do not need to change the HQL queries (with a few exceptions) when you change databases like MySQL, Oracle, etc. What are the advantages of Hibernate over JDBC? In hibernate each record is represented as a Object but in JDBC each record is nothing but a data which is nothing but primitive values. Whereas JDBC is not object oriented moreover we are dealing with values means primitive data. Hibernate is a ORM tool means it support Object relational mapping. so hibernate is faster as compared to jdbc.ĥ. Hibernate supports Cache Memory whereas JDBC does not support cache memory.
In Hibernate, Exception Handling is not mandatory, whereas In JDBC exception handling is mandatory. Hibernate framework is independent of Database because it supports HQL (Hibernate Query Language) which is not specific to any database, whereas JDBC is database dependent.Ĥ. It means in JDBC we have to manually set a primary key for a table. Hibernate supports Auto Primary key generation. But Hibernate can do DDL operations for you internally like creation of table,drop a table,alter a table etc.Ģ. In JDBC manually we have to create table and declare the data-type for each and every column. Hibernate framework support Auto DDL operations. What are the important benefits of using Hibernate Framework?ġ. Object mapping is configurable, but defaults tend to work well. Once the table is set up, each table row corresponds to an object in the application. In Java, the ORM layer converts Java classes and objects so that they can be stored and managed in a relational database.īy default, the name of the object being persisted becomes the name of the table, and fields become columns. As part of the application architecture, the ORM layer is responsible for managing the conversion of objects to interact with the tables and columns in a relational database. A framework like Hibernate ORM codifies that task into a library or framework, an ORM layer.
Likewise, while JPA was originally intended for use with relational/SQL databases, some JPA implementations have been extended for use with NoSQL datastores.Īns - Object-relational mapping is a task–one that developers have good reason to avoid doing manually. While JPA's object-relational mapping (ORM) model was originally based on Hibernate, it has since evolved.
What is Java Persistence API (JPA)?Īns - JPA is not a tool or framework rather, it defines a set of concepts that can be implemented by any tool or framework.
Latest hibernate interview questions software#
More precisely Hibernate is an open-source, non-invasive, light-weight java ORM(Object-relational mapping) framework to develop objects which are independent of the database software and make independent persistence logic in all JAVA, JEE. Persistence logic means to store and process the data for long use. It is a java framework which is used to develop persistence logic. Ans - Hibernate is a framework which provides some abstraction layer, meaning that the programmer does not have to worry about the implementations, Hibernate does the implementations for you internally like Establishing a connection with the database, writing query to perform CRUD operations etc.
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