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Spring Boot Interview questions

What Is Spring Boot?
Spring Boot Framework is Spring Boot Starter, Spring Boot AutoConfigurator, Spring Boot Actuator, Embedded HTTP Servers and Groovy.
Spring Boot makes it easy to create stand-alone, production-grade Spring based applications that you can just run.

Spring Boot Framework is Spring Boot CLI.

What are the features of Spring Boot?
The features of Spring Boot as following -
1.      Dependency Management
2.      Starter dependency
3.      Auto-Configuration and Advanced Externalized Configuration
4.      Spring Initializer
5.      Spring Actuator
6.      Spring CLI
7.      Runnable Jars

What are the advantages of spring boot application?
1.      Perfect tool for building cloud microservices
2.      Easy to develop Spring Based applications with Java
3.      Create stand-alone spring applications
4.      Embed Tomcat, Jetty or Undertow directly
5.      Reduces lots of development time
6.      Easier to launch from a contain
7.      Increases productivity
8.      Strong support for Security
9.      Automatically configure spring whenever possible
10. Absolutely no code generation and no requirement for XML configuration
11. Plenty of SpringBoot Starter to quickly get up and running

What does spring framework do?
Spring framework lets you develop java j2ee applications in a rapid easy ways but the problem is setting up spring project manually as it involved lot of xml configurations.

What does spring boot do?
Spring boot aims to wrap all the spring components in a convenient way with no external xml configuration whatsoever. So basically spring boot wraps the spring framework itself.

What Is spring boot Microservices?
Microservices allow large systems to be built up from a number of collaborating components.

Why we need Spring Boot?
Spring Framework aims to simplify Java Applications Development.
Spring Boot Framework aims to simplify Spring Development.

Explain about Spring boot starter POM file?
Starter POM files actually contains a lot of dependencies, so that project can be up and running quickly within in a very short span of time.

What Is auto configuration in spring boot?
Spring Boot auto-configuration attempts to automatically configure your spring application based on the jar dependencies that we have added.

We need to opt-in to auto-configuration by adding the @EnableAutoConfiguration or @SpringBootApplication annotations to one of our @Configuration classes.

What Is Spring Boot Starter?
Spring Boot Starters are just JAR Files and it used by Spring Boot Framework to provide Auto-Dependency Resolution.

What Is Spring Boot AutoConfigurator?
Spring Boot AutoConfigurator is used by Spring Boot Framework to provide Auto-Configuration.

What Is @configuration in spring boot?
What are the uses of @EnableAutoConfiguration annotation?
What Is the difference between @SpringBootApplication and @EnableAutoConfiguration annotation?

What Is Spring Boot CLI?
Spring Boot CLI is Auto Dependency Resolution, Auto-Configuration, Management EndPoints, and Groovy.

What Is thymeleaf?
Thymeleaf is a server side Java template engine for web application and its main goal is to bring elegant natural templates to your web application.

Thymeleaf can be integrating with Spring Framework and ideal for HTML5 Java web applications.

What Is @RestController annotation in Spring Boot?
The @RestController is a stereotype annotation.

What Is @RequestMapping annotation in Spring Boot?
The @RequestMapping annotation is used to provide routing information

What Is Spring MVC?
Spring MVC is a traditional web application framework that helps you to build web applications. It is similar to Struts framework.

Is spring boot a MVC?
Spring Web MVC is a feature of the core Spring Framework — MVC (Model View Controller) is a software engineering design pattern, commonly used in designing web applications.

Spring Web MVC provides the groundwork for writing web apps in spring. Spring Boot includes Spring Framework, which includes Spring Web MVC.
By Anil Singh | Rating of this article (*****)

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