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Spring Boot Essentials

on July 06, 2023

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Technical Section.

Interview Questions & Tutorial on Jersey REST API What is rest ? Rest is representational state transfer and it uses HTTP protocol for communication. It is working on the top of HTTP protocol.Here component is a resource and accessed by standard HTTP protocols. It is architectural style representation of HTTP. Each resource is identified by URI. It supports both XML and JSON. It is used for making single page web apps Commonly used HTTP method Get -> It is used for accessing data.It is a read only operation Post -> It is used to create new data like create new object .It is read and write both Put -> It is used to update if data is not present then used to create it Delete -> It is used delete the data with given id or some identifier. What is a web service? It is collection of open protocols used for exchanging data between systems. Different ways to represent a resource ? JSON XML HTML FORMS(param...

Hibernate

What is Hibernate ? Hibernate is just a ORM(Object Relational Mapping) tool which is used for persisting data to database and retrieving data from database. . What is difference between Hibernate & JPA? JPA is a interface which has no concrete implementation and Hibernate is implementation and just a JPA provider. JPA venders: Batoo JPA DataNucleus (formerly JPOX) EclipseLink (formerly Oracle TopLink) IBM, for WebSphere Application Server Hibernate ObjectDB OpenJPA Hibernate Advantages: Hibernate takes care of mapping Java classes to database tables using XML files and without writing any line of code. Provides simple APIs for storing and retrieving Java objects directly to and from the database. Hibernate does not require an application server to operate. Manipulates Complex associations of objects of your database. Minimize database access with smart fetching strategies. Provides Simple queryin...

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