Spring Boot Interview Questions

Filed Under: Spring

Today we will look into some spring boot interview questions and answers. So far, we have discussed some posts about Spring Boot Framework with some real-time examples. In this post, I’m going to give you brief or one-shot answers to some Spring Boot Interview Questions. They are very useful when we want to face interview.

Spring Boot Interview Questions

Spring Boot is a one-stop Framework to develop Spring applications very easily. I have covered a lot of spring interview questions earlier, this is specifically for spring boot interview questions and answers.

These spring boot interview questions are good for experienced programmers as well as new to spring boot framework.

What is Spring Boot?

In simple words, Spring Boot Framework is Auto-Dependency Resolution, Auto-Configuration, Management EndPoints, Embedded HTTP Servers(Jetty/Tomcat etc.) and Spring Boot CLI

spring boot interview questions, what is spring boot

In other words, Spring Boot Framework is Spring Boot Starter, Spring Boot Auto-Configurator, Spring Boot Actuator, Embedded HTTP Servers, and Groovy.

Spring Boot interview questions and answers

In other words, Spring Boot Framework is Spring Boot CLI.

what is Spring Boot CLI

NOTE:-
If you are confused about the last two definitions, please read the rest of the post to make it clear.

Why we need Spring Boot?

  1. Spring Framework aims to simplify Java Applications Development.
  2. Spring Boot Framework aims to simplify Spring Development.

spring boot benefits

Spring Boot Components

Spring Boot Framework has the following components:

  1. Spring Boot Starter
  2. Spring Boot AutoConfigurator
  3. Spring Boot Actuator
  4. Spring Boot CLI
  5. Spring Boot Initilizr

What is Spring Boot Starter?

Spring Boot Starters are just JAR Files. They are used by Spring Boot Framework to provide “Auto-Dependency Resolution”.

spring boot starter

What is Spring Boot AutoConfigurator?

Spring Boot AutoConfigurator is used by Spring Boot Framework to provide “Auto-Configuration”.

spring boot auto configurator

What is Spring Boot Actuator?

Spring Boot Actuator is used by Spring Boot Framework to provide “Management EndPoints” to see Application Internals, Metrics etc.

spring boot actuator

What is Spring Boot CLI?

In simple words, Spring Boot CLI is Auto Dependency Resolution, Auto-Configuration, Management EndPoints, Embedded HTTP Servers(Jetty, Tomcat etc.) and (Groovy, Auto-Imports)

spring boot cli

In other words, Spring Boot CLI is Spring Boot Starter, Spring Boot Auto-Configurator, Spring Boot Actuator, Embedded HTTP Servers, and Groovy.

what is spring boot cli

With Spring Boot CLI:

  • No Semicolons
  • No Public and private access modifiers
  • No Imports(Most)
  • No “return” statement
  • No setters and getters
  • No Application class with main() method(It takes care by SpringApplication class).
  • No Gradle/Maven builds.
  • No separate HTTP Servers.

What is Spring Boot Initilizr?

Spring Boot Initilizr is a Spring Boot tool to bootstrap Spring Boot or Spring Applications very easily.

Spring Boot Initilizr comes in the following forms:

  1. Spring Boot Initilizr With Web Interface
  2. Spring Boot Initilizr With IDEs/IDE Plugins
  3. Spring Boot Initilizr With Spring Boot CLI
  4. Spring Boot Initilizr With ThirdParty Tools

Why we need Spring Boot Initilizr?

Spring Boot Initilizr simplifies Spring Applications Development by providing initial project structure and build scripts.

  • It reduces Development time
  • It increases Productivity

Spring Boot With Maven/Gradle?

Spring Boot Framework uses one of the greatest features of Maven/Gradle build tools: “Transitively Dependency Resolution Management”.

What is “Transitively Dependency Resolution Management”?

“Transitively Dependency Resolution Management” means: If we define an “A” dependency in build scripts, “A” is dependent on “B” and “B” is dependent on “C”, That means “A” is also dependent on “C”.
Then Build Tools will download and add all Three Jar files “A”, “B” and “C” to our application classpath.

transitive dependency resolution

That’s all about Spring Boot interview questions and answers. If you want to learn these concepts in depth, please go through my previous posts one by one. You should also go through official documentation.

Comments

  1. sami klamy says:

    i think you should write what CLI abbreviation is for

    1. Sean Litgit says:

      CLI is command line interface.

  2. ksahoo says:

    Good to start with. Thanks for sharing

  3. Ajeet Singh says:

    Rambabu thanks for sharing this info.

    Could you please add some more questions/tutorials related to customized configuration in Boot

    1. Rambabu says:

      Thanks Ajeet Singh to read my tutorials. Yes sure will work on them soon.

  4. Developer says:

    It could be better if you more questions on this.

  5. pranit says:

    Informative and very helpful article!
    I have been looking for some spring boot interview questions and answers and here i have found it so well so i can prepare for my next interview. Now after reading this article i am very much clear about all concepts related to spring boot. Thanks for sharing it!

  6. Mathi says:

    Very well explained. Thank you and appreciated

  7. Mouli says:

    Thanks, it is a nice start up

  8. Sridhar says:

    Really a fantastic way of definitions and explanations..I can easily understand all the topics very easily….Very thanks…

  9. mashaoli says:

    Java Design Patterns 130

  10. Marcos Azevedo says:

    Yes, I’ve been following too. Spring boot seems a good alternative to Grails

    1. Rameshkumar Ramasamy says:

      Spring boot is inspired by Groovy. IMHO, Pivotal Labs has remodeled it.

  11. Bala says:

    I read all Spring Boot Tutorial. They are really good useful for me. Waiting for some advanced concepts please.

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