Spring Boot Interview Questions: Spring Boot is a framework built on top of the Spring framework that helps to build standalone Spring-based applications easily and quickly. It is designed to provide a simpler and faster way to develop and deploy applications using Spring without requiring extensive configuration.

Spring Boot achieves this by providing a range of pre-configured features and settings that can be used out-of-the-box and by using an opinionated approach to a design that helps to reduce the amount of boilerplate code required.

Spring Boot also provides a range of production-ready features, such as monitoring and management tools, that can be used to help deploy and manage applications in production environments.

Some key benefits of using Spring Boot include faster development time, simplified deployment, automatic configuration, and increased productivity. Overall, Spring Boot is a popular choice for building modern Java applications and is widely used in various industries and applications.

Spring Boot Interview Questions

A Spring Boot interview asks candidates about their knowledge and experience with Spring Boot, a popular Java framework for building standalone Spring-based applications.

The interview typically covers topics such as the advantages of using Spring Boot, the different types of dependencies, how to create a Spring Boot project, how to use annotations like @SpringBootApplication, and more.

The interview aims to assess the candidate’s understanding of Spring Boot and its ability to use it effectively in real-world projects. The interviewer may also ask the candidate to demonstrate their knowledge by providing code examples or solving coding problems related to Spring Boot.

Most Asked Spring Boot Interview Questions With Answers:

Q: What is Spring Boot, and what are its advantages?

Spring Boot is a framework that helps to build standalone Spring-based applications. It is built on top of the Spring framework and provides an easy way to create applications quickly. Its advantages include reduced development time, automatic configuration, simplified deployment, and increased productivity.

Q: What is the difference between Spring and Spring Boots?

Spring is a framework for building enterprise-level Java applications, while Spring Boot is a framework for building standalone Spring applications with minimal configuration.

Q: What are the different types of dependencies in Spring Boot?

There are three types of dependencies in Spring Boot: Starter Dependencies, Test Dependencies, and BOM (Bill of Materials) Dependencies.

Q: What is a Spring Boot Starter?

A Spring Boot Starter is a pre-configured set of dependencies that can be used to set up and build a specific type of application quickly.

Q: How do you create a Spring Boot project?

You can create a Spring Boot project using the Spring Initializr, a web-based tool that helps generate a Spring Boot project with the necessary dependencies.

Q: What is the role of the @SpringBootApplication annotation?

The @SpringBootApplication annotation marks the main class of a Spring Boot application. It combines three annotations: @Configuration, @EnableAutoConfiguration, and @ComponentScan.

Q: What is auto-configuration in Spring Boot?

Auto-configuration in Spring Boot is the process of automatically configuring the application based on the dependencies that are included in the project.

Q: What is a Spring Boot Actuator?

Spring Boot Actuator is a sub-project of Spring Boot that provides production-ready features to help monitor and manage the application.

Q: What is the difference between @Component, @Service, and @Repository in Spring?

@Component is a generic annotation used to mark any Spring-managed component, @Service is used to mark a service component, and @Repository is used to mark a repository component.

Q: What is Spring Boot CLI, and how is it used?

Spring Boot CLI is a command-line interface tool that creates, develops and tests Spring Boot applications. It can be used to create a new project, run the application, and test it.

Q: What is the difference between Spring MVC and Spring Boot?

Spring MVC is a framework for building web applications using the Model-View-Controller (MVC) pattern, while Spring Boot is a framework for building standalone Spring applications.

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Q: What is Spring Boot DevTools, and how is it used?

Spring Boot DevTools is a set of tools that can enhance the development experience of Spring Boot applications. It provides features such as automatic restart, lives to reload, and more.

Q: What is the role of application.properties in Spring Boot?

Application.properties is a configuration file that can be used to configure the properties of a Spring Boot application.

Q: What is Spring Data JPA, and how is it used in Spring Boot?

Spring Data JPA is a sub-project of Spring Data that provides a framework for working with relational databases. It can be used in Spring Boot to simplify working with databases.

Q: What is the difference between @Autowired and @Resource in Spring?

@Autowired is used to inject dependencies by type, while @Resource is used to inject dependencies by name.

Q: What is the purpose of @Transactional in Spring Boot?

@Transactional is used to mark a method as transactional, which means that if any exception occurs during the execution of the method, the entire transaction will be rolled back.

Q: What is Spring Boot Actuator endpoint?

Spring Boot Actuator endpoint is an HTTP endpoint provided by the Spring Boot Actuator sub-project. It can be used to monitor and manage the application.

How To Crack Spring Boot Interview

To crack a Spring Boot interview, here are some tips and strategies:

• Know the basics: Make sure you have a strong understanding of the core concepts of Spring Boot, including the advantages, different types of dependencies, how to create a project, how to use annotations, and more.
• Practice coding: Get comfortable with coding in Spring Boot by practicing coding exercises and working on sample projects. This will help you to gain a deeper understanding of the framework and its features.
• Be prepared for technical questions: Expect to be asked technical questions related to Spring Boot, such as how to handle dependencies, how to configure properties, how to use different annotations, and more. Practice answering these questions to build your confidence.
• Understand the application lifecycle: Make sure you understand the lifecycle of a Spring Boot application, including how it is initialized, how dependencies are managed, and how the application is deployed.
• Be prepared to demonstrate your knowledge: During the interview, you may be asked to show your expertise by providing code examples or solving coding problems related to Spring Boot. Practice doing this beforehand to build your confidence.
• Know the latest trends and best practices: Keep up to date with the latest trends and best practices in Spring Boot and demonstrate your knowledge during the interview. This will show the interviewer you are committed to staying current with industry developments.
• Be confident and personable: Finally, be confident during the interview. Show your enthusiasm for Spring Boot and interest in the company and the role. Good communication skills and a positive attitude can go a long way toward impressing the interviewer.