Spring Boot Interview Questions and Answers

Ques 1. How can you change JDK version in Spring Boot?

<properties>
<java.version>11</java.version>
</properties>

Ques 2. What is Spring Boot starter? How is it useful?

Ques 3. How can you access a value defined in the application? What is properties file in Spring Boot?

@Value(”${custom.value}”)

private String customVal;

Ques 4. What is the primary difference between Spring and Spring Boot?

Spring is a web application development framework based on Java. On the other hand Spring Boot is an extension of the spring framework which eliminated the boilerplate configuration required for setup a Spring application.

Ques 5. How can you connect Spring Boot to the database using JPA?

Spring Boot supports spring-boot-starter-data-jpa, which helps you to connect spring application with a relational database.

Ques 6. What is the main difference between JPA and Hibernate?

The main difference between both of them is that JPA is a specification/Interface, whereas Hibernate is only JPA implementations.

Ques 7. What are Spring Boot Starter Projects?

Starters in Spring Boot are a set of convenient descriptors that are included in Spring Boot applications. It comes with a variety of Spring-related technology which makes the entire process of the application development much easier.

Ques 8. What is @pathVariable?

@PathVariable annotation helps you to extract information from the URI directly.

Ques 9. How to scan all the beans and package declarations in Spring Boot?