Скачать или смотреть If You Don’t Know These Spring Boot Questions, You Won’t Get the Job! | CodeWithMaddy

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In this video, we’ll explore the Top 10 most-asked Spring Boot interview questions to help you ace your next interview! These questions cover key concepts like Dependency Management, Dependency Injection, Exception Handling, Spring Boot Actuator, and much more!

We’ve included:
✅ Realistic answers that interviewers love.
✅ Pro tips to make your responses stand out.
✅ Real-life examples to help you connect theory with practice.
Here’s what we cover with answers:

1️⃣ How does Spring Boot manage dependencies?
Spring Boot uses starter dependencies to simplify dependency management. These pre-configured dependencies group all required libraries for a specific type of application.
Example: Adding spring-boot-starter-web includes libraries like Tomcat, Spring MVC, and validation.
Pro Tip: Mention how the spring-boot-dependencies BOM ensures version compatibility, preventing dependency conflicts.

2️⃣ What is Spring Boot, and why is it used?
Spring Boot is a framework built on top of Spring that simplifies Java application development by providing auto-configuration and embedded servers like Tomcat.
Example: Instead of manually setting up server configurations, Spring Boot does it for you.
Pro Tip: Highlight key features like starter dependencies, embedded servers, and production-ready tools like Actuator.

3️⃣ What is the difference between Spring and Spring Boot?
Spring is a comprehensive framework that requires manual setup, while Spring Boot automates most configurations using conventions like auto-configuration and starter dependencies.
Example: With Spring Boot, you can build a web application with just one dependency: spring-boot-starter-web.
Pro Tip: Emphasize that Spring Boot is Spring’s productivity booster.

4️⃣ What is the role of application.properties or application.yml?
This file centralizes application configuration, like database connections, server ports, or logging levels.
Example: Setting server.port=8081 changes the default server port.
Pro Tip: Mention how environment-specific profiles (application-dev.yml) simplify managing multiple environments.

5️⃣ What is the difference between @RestController and @Controller?

@RestController is a combination of @Controller and @ResponseBody, making it ideal for RESTful APIs.
@Controller is used for traditional web applications, where HTML pages are returned.
Example: Use @RestController for JSON responses and @Controller for Thymeleaf or JSP templates.
Pro Tip: Show that you understand RESTful design when discussing @RestController.
6️⃣ What is Spring Boot Actuator, and how is it used?
Spring Boot Actuator provides built-in endpoints for monitoring and managing applications, such as /actuator/health.
Example: Use it to check app health, metrics, or readiness probes in production environments.
Pro Tip: Mention that Actuator endpoints can be customized for security and production needs.

7️⃣ How do you handle exceptions in Spring Boot?
Use @ControllerAdvice and @ExceptionHandler for centralized exception handling.
Example: Catch InvalidInputException and return a custom error message with an appropriate HTTP status code.
Pro Tip: Always return meaningful error messages and status codes for better client-side debugging.

8️⃣ What is Dependency Injection, and which type is best?
Dependency Injection (DI) is a design pattern where dependencies are provided externally rather than created inside a class.
Types in Spring Boot:

Constructor Injection (preferred).
Setter Injection.
Field Injection.

Pro Tip: Constructor Injection is best because it ensures immutability, aligns with SOLID principles, and makes testing easier.
Real-Life Example: Think of DI like plugging a charger into a device—Constructor Injection ensures the right charger is used from the start.

9️⃣ How does Spring Boot implement security?
Spring Boot uses Spring Security for authentication and authorization.
Example: Adding spring-boot-starter-security enables basic authentication by default.
Pro Tip: Mention using SecurityConfig for customization and implementing JWT for stateless, scalable authentication.

🔟 How does Spring Boot handle database access?
Spring Boot simplifies database interactions using Spring Data JPA.
Example: Use @Entity to map Java classes to database tables and JpaRepository for CRUD operations.
Pro Tip: Highlight @Transactional for managing transactions effectively.

✨ Pro Tips & Real-Life Examples Included!

💡 Whether you’re preparing for a developer interview or brushing up on your Spring Boot skills, this video will give you actionable insights to impress your interviewer.

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