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The Ultimate Guide to Liferay DXP Performance Tuning: Speed Up Your Portal

The Ultimate Guide to Liferay DXP Performance Tuning: Speed Up Your Portal In the enterprise web space, milliseconds equal millions. Whether you are running a B2B commerce storefront, a customer support portal, or an employee intranet on Liferay DXP, slow load times will devastate your user experience and destroy your SEO rankings. Out of the box, Liferay is configured to run on almost any machine. This means its default settings are highly conservative to ensure compatibility, not maximum performance. If you are launching a production environment without tuning your server, you are leaving massive amounts of speed and scalability on the table. In this comprehensive, deep-dive guide, we are going to explore the critical layers of Liferay performance tuning. We will cover backend Java Virtual Machine (JVM) configuration, Database Connection Pooling, Elasticsearch optimization, and Frontend caching strategies. By the end of this guide, you will have a blazing-fast, enterprise-grade...
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🚀 Top Spring Boot Interview Questions (2026) – For Freshers & Experienced Developers

 

🚀 Top Spring Boot Interview Questions (2026) – For Freshers & Experienced Developers



If you are preparing for a Spring Boot interview, this comprehensive list of frequently asked Spring Boot interview questions will help you revise core concepts and advanced topics.

Whether you are a fresher or an experienced developer, interviewers often ask fundamental questions to evaluate your conceptual clarity.

Below is a categorized list of important Spring Boot interview questions.


🔹 Basic Spring Boot Interview Questions

  1. What is Spring Boot?

  2. How is Spring Boot different from the Spring Framework?

  3. Why was Spring Boot introduced?

  4. What are the advantages of Spring Boot?

  5. What are the limitations or drawbacks of Spring Boot?

  6. What is the architecture of Spring Boot?

  7. How does Spring Boot simplify application development?

  8. What is auto-configuration in Spring Boot?

  9. How does Spring Boot work internally?

  10. What is the difference between Spring and Spring Boot?

🔹 Core Concepts & Annotations

  1. What is @SpringBootApplication and how does it work internally?

  2. What are the annotations included inside @SpringBootApplication?

  3. What is @ComponentScan?

  4. What is @EnableAutoConfiguration?

  5. What is @Configuration?

  6. What is the difference between @Component, @Service, and @Repository?

  7. What is @Autowired and how does dependency injection work?

  8. What is @Qualifier?

  9. What is @Value annotation?

  10. What is the Bean lifecycle in Spring Boot?

🔹 Embedded Servers & Deployment

  1. What are the default embedded servers in Spring Boot?

  2. How do you change the default embedded server?

  3. What is the difference between JAR and WAR packaging?

  4. How do you deploy a Spring Boot application on an external Tomcat server?

  5. What are the prerequisites for deploying Spring Boot on external Tomcat?

  6. How does Spring Boot load dependencies into the classpath?

  7. What is spring-boot-starter-parent?

  8. What are starter dependencies in Spring Boot?

  9. How does Spring Boot handle application properties?

  10. What is the difference between application.properties and application.yml?

🔹 Spring MVC & REST

  1. What is MVC architecture?

  2. What is the difference between @Controller and @RestController?

  3. What is @RequestMapping?

  4. What is @GetMapping, @PostMapping, @PutMapping, and @DeleteMapping?

  5. What is ResponseEntity?

  6. How does exception handling work in Spring Boot?

  7. What is @ControllerAdvice?

  8. What is CORS and how do you configure it in Spring Boot?

  9. What is content negotiation?

  10. How does Spring Boot handle JSON conversion?

🔹 Spring Data & Database

  1. What is Spring Data JPA?

  2. What is the difference between CrudRepository and JpaRepository?

  3. What is the difference between findById() and getById()?

  4. What is Lazy loading vs Eager loading?

  5. What is the N+1 problem?

  6. How does transaction management work in Spring Boot?

  7. What is @Transactional?

  8. How do you configure multiple databases in Spring Boot?

  9. What is Hibernate’s role in Spring Boot?

  10. How do you enable SQL logging?

🔹 Security & Authentication

  1. What is Spring Security?

  2. How does authentication work in Spring Boot?

  3. What is JWT and how is it implemented in Spring Boot?

  4. What is OAuth2?

  5. What is the difference between authentication and authorization?

  6. How do you secure REST APIs in Spring Boot?

  7. What is CSRF?

  8. What is password encoding in Spring Security?

🔹 Microservices & Cloud

  1. What is a microservice architecture?

  2. How is Spring Boot used in microservices?

  3. What is Eureka Server?

  4. What is an API Gateway?

  5. What is a Circuit Breaker pattern?

  6. What is OpenFeign?

  7. What is Spring Cloud?

  8. What is centralized configuration?

  9. How do services communicate in microservices architecture?

🔹 Production & Monitoring

  1. What is Spring Boot Actuator?

  2. What are Actuator endpoints?

  3. How do you monitor application health?

  4. How do you configure logging in Spring Boot?

  5. What is Logback?

  6. How do you enable profile-based configuration?

  7. What is DevTools in Spring Boot?

  8. How do you handle application performance tuning?

🔹 Advanced & Frequently Asked Questions

  1. What is IoC (Inversion of Control)?

  2. What is Dependency Injection?

  3. What is AOP in Spring Boot?

  4. What is the difference between ApplicationRunner and CommandLineRunner?

  5. What are conditional annotations in Spring Boot?

  6. What is the difference between synchronous and asynchronous processing?

  7. How does caching work in Spring Boot?

  8. What is @Async annotation?

  9. How do you handle file uploads in Spring Boot?

  10. How do you configure Swagger in Spring Boot?

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