Topic: Mastering Hibernate and Spring Framework
Hibernate and Spring are essential components in the technology stack of any Java developer.
Hibernate is a Java Framework which is developed on JPA(Java Persistence API) that provides an efficient way to perform the database operation. It is a high-performance Object/Relational persistence and query service which is much appreciated for its elevated data processing capabilities with accessibility through Java APIs.
Spring, on the other hand, is an open-source, lightweight framework. It creates and manages the life cycle of different beans via Inversion of Control (IoC) and Dependency Injection (DI). The Spring’s layered architecture consists of several modules such as Spring AOP, Spring MVC, Spring ORM etc. Spring MVC helps in building flexible and loosely coupled web applications. The AOP module allows for aspect-oriented programming and you can even add functionality to objects declaratively. Spring Boot is a way to easily create stand-alone, production-grade Spring-based applications.
Interview Questions:
1. What is Hibernate Framework?
Answer: Hibernate is a framework that provides an abstract layer for mapping object-oriented domain models to a traditional relational database. In other words, you can communicate with the database in a Java-friendly manner without writing complex SQL queries.
2. Explain the Core concepts of the Spring Framework.
Answer: The core concepts of Spring Framework are Inversion of Control (IoC) and Dependency Injection (DI). The Spring container uses DI to manage the components that make up an application. These objects are called Spring Beans, and they are managed in the Spring IoC container.
3. How does Spring MVC work?
Answer: Spring MVC, or Model-View-Controller, is a module in the Spring Framework. The Controller takes the request and calls the appropriate service methods based on a used GET or POST method. The service method will set the model data and send that data to the view. The view is then generated and sent to the client for display.
4. Describe Hibernate’s transaction management.
Answer: Transaction management is an important part of any enterprise application and it helps maintain data integrity. Hibernate transaction management is based on the JTA specification and it allows you to work in both managed and non-managed environments. It also integrates smoothly with various transaction strategies, from JTA to a local database transaction.
5. What is Spring Boot and why is it important?
Answer: Spring Boot makes it easy to create stand-alone, production-grade Spring-based applications. It simplifies the setup of Spring applications. You can get started with minimum configurations without the need for an entire Spring configuration setup.
