2 – 3 Years Java Developer Spring Boot Interview Questions (2026) – Most Asked Spring & Spring Boot Interview Questions

If you’re preparing for a Java Developer interview with around 2 years of experience, you can expect interviewers to focus on your understanding of Spring Framework and Spring Boot internals rather than just basic Java concepts. Companies are increasingly asking scenario-based and framework-level questions to evaluate how well candidates understand the technologies they use in real-world projects.

This article lists some of the most frequently asked Spring and Spring Boot interview questions for developers with 2 years of experience. These questions are commonly asked in service-based companies, product-based companies, and MNCs during technical interviews.

---

Spring Framework Interview Questions

Spring Core

• Explain Spring Bean Lifecycle internally.
• What is the role of the IoC (Inversion of Control) Container?
• What is the difference between BeanFactory and ApplicationContext?
• What happens during component scanning?
• How does Dependency Injection work internally?
• Constructor Injection vs Setter Injection vs Field Injection.
• Why is Constructor Injection preferred?
• What is Circular Dependency? How do you resolve it?
• What are Bean Scopes in Spring?
• What are Singleton Bean thread safety issues?
• What is @PostConstruct and @PreDestroy?
• What is BeanPostProcessor?
• What is the @Lazy annotation?
• What is the @Primary annotation?
• What is the @Qualifier annotation?
• What are Conditional Annotations in Spring?
• What is the difference between @Component, @Service, @Repository, and @Controller?

---

Spring Bean and Dependency Management

• What is @Configuration?
• What is the difference between @Configuration and @Component?
• What is the difference between @Bean and @Component?
• What is the difference between @Autowired and @Inject?
• What happens if multiple beans of the same type exist?
• How does Spring resolve bean conflicts?
• What is eager loading and lazy loading?
• What is BeanDefinition?
• What is DefaultListableBeanFactory?
• Can Spring manage objects created using the new keyword?
• What is FactoryBean?
• What is the Environment interface in Spring?

---

Spring AOP and Proxy

• What is Spring AOP?
• How does Spring create proxies?
• What is the difference between JDK Dynamic Proxy and CGLIB Proxy?
• What is the use of the @Value annotation?
• What is the lifecycle of a Prototype Bean?
• How does BeanPostProcessor create proxies?
• What is the difference between compile-time weaving and runtime weaving?

---

Spring Boot Interview Questions

Spring Boot Basics

• What is Spring Boot?
• How does Auto Configuration work internally?
• What is the role of @SpringBootApplication?
• Which annotations are included inside @SpringBootApplication?
• How does Spring Boot identify Auto Configurations?
• What are Spring Boot Starters?
• How do you create a custom Spring Boot Starter?
• What is Spring Boot Actuator?
• What are the important Actuator endpoints?
• What is Externalized Configuration?

---

Spring Boot Configuration

• What is the order of Property Resolution in Spring Boot?
• How do Spring Profiles work?
• What is the difference between application.properties and application.yml?
• How do you configure multiple profiles?
• What is @ConfigurationProperties?
• What is the difference between @ConfigurationProperties and @Value?
• What is Relaxed Binding?
• How do you exclude Auto Configuration?
• What are Conditional Auto Configurations?

---

Spring Boot Startup

• What happens internally when a Spring Boot application starts?
• How do you customize Spring Boot startup behavior?
• What is SpringApplication?
• What is SpringApplicationBuilder?
• What is CommandLineRunner?
• What is ApplicationRunner?
• How does the embedded Tomcat server start?
• How do you change the default server port?
• What is the difference between JAR and WAR deployment?
• What is Spring Boot DevTools?

---

Advanced Spring Boot Interview Questions

Application Flow

• Explain the complete request flow in Spring Boot.
• How does DispatcherServlet work internally?
• Explain the internal flow of a REST API request.
• What happens internally when @Autowired is used?
• Explain the complete Spring Boot startup sequence.
• How are beans loaded into the ApplicationContext?
• What is the difference between @ComponentScan and @EntityScan?
• What is the difference between @Import and @ComponentScan?

---

Troubleshooting and Best Practices

• How do you improve Spring Boot application startup performance?
• How do you troubleshoot Bean Creation Exceptions?
• What causes NoSuchBeanDefinitionException?
• What causes BeanCurrentlyInCreationException?
• How do you resolve Circular Dependency in Spring Boot?
• What is the difference between Singleton and Prototype scope?
• How does Spring Boot handle configuration precedence?
• How do you secure sensitive application properties?
• How do you create custom annotations in Spring?
• How do you debug Spring Boot startup issues?

---

Final Thoughts

Preparing these Spring Framework and Spring Boot interview questions will help you build a strong foundation for Java Developer interviews with 2 years of experience. Most interviewers focus on framework internals, dependency injection, bean lifecycle, auto-configuration, application startup, and real-time project scenarios. Along with these questions, be prepared to explain your current project architecture, REST APIs, Spring Data JPA, Microservices, Exception Handling, Logging, Security, and deployment process, as these topics are frequently discussed during technical interviews.

This list serves as a practical checklist to ensure you cover the most important concepts before attending your next Java Spring Boot interview.