Top 50 Spring Boot Interview Questions and Answers in 2024

Spring Boot Interview Questions For Freshers
  • What are the advantages of using Spring Boot? …
  • What are the Spring Boot key components? …
  • Why Spring Boot over Spring? …
  • What is the starter dependency of the Spring boot module? …
  • How does Spring Boot works? …
  • What does the @SpringBootApplication annotation do internally?

Spring Boot Interview Questions and Answer | Most asked / Tricky Interview Questions | Code Decode

Spring Boot Interview Questions

Spring Spring Boot
A web application framework based on Java A module of Spring
Provides tools and libraries to create customized web applications Used to create a Spring application project which can just run/ execute
Spring is more complex than Spring Boot Spring Boot is less complex than the Spring framework
Takes an unopinionated view Takes an opinionated view of a platform

60. What is dependency Injection?

Classes often require references to other classes. For example, a Train class might need a reference to an Engine class. These required classes are called dependencies, and in this example, the Train class is dependent on having an instance of the Engine class to run.

Dependency injection is a programming technique that makes a class independent of its dependencies. This is achieved by decoupling the usage of an object from its creation. Dependency injection allows the creation of dependent objects outside of a class, and it provides those objects to a class in different ways. The user can move the creation and binding of the dependent objects outside of the class that depends on them, using dependency injection.

26. Mention the advantages of Spring Boot.

Advantages of Spring Boot-

  • It allows convention over configuration hence you can fully avoid XML configuration.
  • SpringBoot reduces lots of development time and helps to increase productivity.
  • Helps to reduce a lot of boilerplate code in your application.
  • It comes with embedded HTTP servers like tomcat, Jetty, etc to develop and test your applications.
  • It also provides CLI (Command Line Interface) tool which helps you to develop and test your application from CMD.
  • Q2. What is Spring Boot and mention the need for it?

    Spring Boot is a Spring module that aims to simplify the use of the Spring framework for Java development. It is used to create stand-alone Spring-based applications that you can just run. So, it basically removes a lot of configurations and dependencies. Aiming at the Rapid Application Development, Spring Boot framework comes with the auto-dependency resolution, embedded HTTP servers, auto-configuration, management endpoints, and Spring Boot CLI.

    So, if you ask me why should anybody use Spring Boot, then I would say, Spring Boot not only improves productivity but also provides a lot of conveniences to write your own business logic.

    7. How to install spring boot in eclipse?

    The classic and preferred way to install STS in eclipse is:

    Go to Eclipse IDE, click on “Help”->then go to Eclipse marketplace->and type Spring IDE and click on the finish button.

    3. How to deploy spring boot application in tomcat?

    Whenever you will create your spring boot application and run it, Spring boot will automatically detect the embedded tomcat server and deploy your application on tomcat. After successful execution of your application, you will be able to launch your rest endpoints and get a response.

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