Top Spring Interview Question & Answer

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Top Spring Interview Questions and Answers

• Hub4Tech

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Question 1 What is Spring?

• Answer
• It is a lightweight, loosely coupled and
  integrated framework for developing enterprise
  applications in java.

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Question 2 What are the advantages of spring
framework?

• Answer
• Predefined Templates
• Loose Coupling
• Easy to test
• Lightweight
• Fast Development
• Powerful Abstraction
• Declarative support

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Question 3 What are the modules of spring
framework?

• Answer
• Test
• Spring Core Container
• AOP, Aspects and Instrumentation
• Data Access/Integration
• Web

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Question 4 What are the types of Dependency
Injection Spring supports?

• Answer
• Setter Injection Setter-based DI is realized by
  calling setter methods on your beans after
  invoking a no-argument constructor or no-argument
  static factory method to instantiate your bean.
• Constructor Injection Constructor-based DI is
  realized by invoking a constructor with a number
  of arguments, each representing a collaborator.

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Question 5What is the role of IOC container in
spring?

• Answer
• IOC container is responsible to
• create the instance
• configure the instance, and
• assemble the dependencies

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Question 6 What is BeanFactory?

• Answer
• 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.
• BeanFactory is able to create associations
  between collaborating objects as they are
  instantiated. This removes the burden of
  configuration from bean itself and the beans
  client.
• BeanFactory also takes part in the life cycle of
  a bean, making calls to custom initialization and
  destruction methods.

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Question 7What are the types of IOC container
in spring?

• Answer
• There are two types of IOC containers in spring
  framework.
• BeanFactory
• ApplicationContext

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Question 8What is the difference between
BeanFactory and ApplicationContext?

• Answer
• BeanFactory is the basic container whereas
  ApplicationContext is the advanced container.
  ApplicationContext extends the BeanFactory
  interface. ApplicationContext provides more
  facilities than BeanFactory such as integration
  with spring AOP, message resource handling for
  i18n etc.

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