Spring Interview Questions & Answers

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Q: – What is Spring ?

Spring is an open source framework created to address the complexity of enterprise application development. One of the chief advantages of the Spring framework is its layered architecture, which allows you to be selective about which of its components you use while also providing a cohesive framework for J2EE application development.

Q: – What are the advantages of Spring framework?

The advantages of Spring are as follows:

  • Spring has layered architecture. Use what you need and leave you don't need now.
  • Spring Enables POJO Programming. There is no behind the scene magic here. POJO programming enables continuous integration and testability.
  • Dependency Injection and Inversion of Control Simplifies JDBC
  • Open source and no vendor lock-in.

Q: -What is Bean Factory ?

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.

Q: – What do you mean by Bean wiring ?

The act of creating associations between application components (beans) within the Spring container is reffered to as Bean wiring.

Q: – What is DelegatingVariableResolver?

Spring provides a custom JavaServer Faces VariableResolver implementation that extends the standard Java Server Faces managed beans mechanism which lets you use JSF and Spring together. This variable resolver is called as DelegatingVariableResolver.

Q: – What is Significance of JSF- Spring integration ?

Spring – JSF integration is useful when an event handler wishes to explicitly invoke the bean factory to create beans on demand, such as a bean that encapsulates the business logic to be performed when a submit button is pressed.

Q: – How to integrate your Struts application with Spring?

To integrate your Struts application with Spring, we have two options:

Configure Spring to manage your Actions as beans, using the ContextLoaderPlugin, and set their dependencies in a Spring context file. Subclass Spring's ActionSupport classes and grab your Spring-managed beans explicitly using a getWebApplicationContext() method.

Q: – What are ORM’s Spring supports ?

Spring supports the following ORM’s :

  • Hibernate
  • iBatis
  • JPA (Java Persistence API)
  • TopLink
  • JDO (Java Data Objects)
  • OJB

Q: – What are the ways to access Hibernate using Spring ?

There are two approaches to Spring’s Hibernate integration:

  • Inversion of Control with a HibernateTemplate and Callback
  • Extending HibernateDaoSupport and Applying an AOP Interceptor

Submitted By:-Payal Rani           Email-ID: – payalrani583@gmail.com

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