Crack Spring Interview | Questions for Freshers and 1-3 Years of Experience Part-2
Spring Framework is one of the most widely used framework in the industry so, we can expect a lot of questions from this topic in the interview.
This is the second video for Spring interview questions for freshers and then in the upcoming videos we'll cover more advanced questions for experienced developers.
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0:15 What is the Spring Bean Lifecycle?
2:38 What are different Scopes of a Bean in Spring Framework?
4:30 @Component VS @Repository VS @Controller VS @Service
8:15 Should we use @Autowired for Dependency Injection?
8:58 What is the use of Spring Data JPA?
10:57 Can we change default JPA provider in Spring boot from Hibernate?
To check out more on the tutorials Topic wise you can follow below links
Links:
Please do checkout other tutorial videos also if required:
Spring Framework: • Spring Framework
DevOps: • DevOps
Java Design Patterns: • Design Patterns
Java 8 Features: • Java 8
Core Java Complete Tutorial: • Core Java Complete Guide
Interview Preparation for Java: • Interview Preparation Java
Python: • Python
Linux: • Linux
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The Spring Framework is an application framework and inversion of control container for the Java platform. The framework's core features can be used by any Java application, but there are extensions for building web applications on top of the Java EE platform.(Wikipedia)
A BeanFactory is like a factory class that contains a collection of beans. The BeanFactory holds Bean Definitions of multiple beans within itself and then instantiates the bean whenever asked for by clients.
The BeanFactory is the actual container which instantiates, configures, and manages a number of beans. These beans typically collaborate with one another, and thus have dependencies between themselves. These dependencies are reflected in the configuration data used by the BeanFactory
BeanFactory also takes part in the life cycle of a bean, making calls to custom initialization and destruction methods.
Bean life cycle is managed by the spring container. When we run the program then, first of all, the spring container gets started. After that, the container creates the instance of a bean as per the request, and then dependencies are injected. And finally, the bean is destroyed when the spring container is closed. Therefore, if we want to execute some code on the bean instantiation and just after closing the spring container, then we can write that code inside the custom init() method and the destroy() method.
Spring Bean Scope in a nutshell refers to the lifecycle and visibility of a bean instance in a Spring-based application. Bean scopes determine the number of instances of a bean that will be created and how long the bean instances will exist. The five main scopes in Spring are: Singleton, Prototype, Request, Session, and Global Session.
#java #spring #springframework #springmvc
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