Spring Boot - Level II

Practice 67 Spring Boot - Level II interview questions with detailed answers. Part of the Spring Boot track on Java Interview Hub.

• How would you handle inter-service communication in a microservices architecture using Spring Boot?
• Can you explain the caching mechanisms available in Spring Boot?
• How would you implement caching in a Spring Boot application?
• Your Spring Boot application is experiencing performance issues under high load. What are the steps you would take to identify and address the performance?
• What are the best practices for versioning REST APIs in a Spring Boot application?
• How does Spring Boot simplify the data access layer implementation?
• What are conditional annotations and explain the purpose of conditional annotations in Spring Boot?
• Explain the role of @EnableAutoConfiguration annotation in a Spring Boot application. How does Spring Boot achieve autoconfiguration internally?
• What are Spring Boot Actuator endpoints?
• How can we secure the actuator endpoints?
• How can we handle multiple beans of the same type?
• What are some best practices for managing transactions in Spring Boot applications?
• How do you approach testing in Spring Boot applications?
• Discuss the use of @SpringBootTest and @MockBean annotations?
• What advantages does YAML offer over properties files in Spring Boot? Are there limitations when using YAML for configuration?
• Explain how Spring Boot profiles work.
• Why Use Profiles?
• What is aspect-oriented programming in the spring framework?
• What is Spring Cloud and how it is useful for building microservices?
• How does Spring Boot make the decision on which server to use?
• How to get the list of all the beans in your spring boot application?
• Describe a Spring Boot project where you significantly improved performance. What techniques did you use?
• Explain the concept of Spring Boot's embedded servlet containers.
• How does Spring Boot make DI easier compared to traditional Spring?
• How does Spring Boot simplify the management of application secrets and sensitive configurations, especially when deployed in different environments?
• Explain Spring Boot's approach to handling asynchronous operations.
• How can you enable and use asynchronous methods in a Spring Boot application?
• You are creating an endpoint in a Spring Boot application that allows users to upload files. Explain how you would handle the file upload and where you would store the files.
• Can you explain the difference between authentication and authorization in Spring Security?
• After successful registration, your Spring Boot application needs to send a welcome email to the user. Describe how would you send the emails to the registered users.
• What is Spring Boot CLI and how to execute the Spring Boot project using boot CLI?
• How Is Spring Security Implemented In A Spring Boot Application?
• How to Disable a Specific Auto-Configuration?
• Explain the difference between cache eviction and cache expiration.
• If you had to scale a Spring Boot application to handle high traffic, what strategies would you use?
• Describe how to implement security in a microservices architecture using Spring Boot and Spring Security.
• In Spring Boot, how is session management configured and handled, especially in distributed systems?
• How you would manage externalized configuration and secure sensitive configuration properties in a microservices architecture?
• Can we create a non-web application in Spring Boot?
• How does Spring Boot support internationalization (i18n)?
• What Is Spring Boot DevTools Used For?
• How can you mock external services in a Spring Boot test?
• How do you mock microservices during testing?
• Explain the process of creating a Docker image for a Spring Boot application.
• Discuss the configuration of Spring Security to address common security concerns.
• Discuss how would you secure a Spring Boot application using JSON Web Token (JWT)
• How can Spring Boot applications be made more resilient to failures, especially in microservices architectures?
• Explain the conversion of business logic into serverless functions with Spring Cloud Function.
• How can Spring Cloud Gateway be configured for routing, security, and monitoring?
• How would you manage and monitor asynchronous tasks in a Spring Boot application, ensuring that you can track task progress and handle failures?
• Your application needs to process notifications asynchronously using a message queue. Explain how you would set up the integration and send messages from your Spring Boot application.
• You need to secure a Spring Boot application to ensure that only authenticated users can access certain endpoints. Describe how you would configure Spring Security to set up a basic form-based authentication.
• How to Tell an Auto-Configuration to Back Away When a Bean Exists?
• How to Deploy Spring Boot Web Applications as Jar and War Files?
• What Does It Mean That Spring Boot Supports Relaxed Binding?
• Discuss the integration of Spring Boot applications with CI/CD pipelines.
• Can we override or replace the Embedded Tomcat server in Spring Boot?
• How to resolve whitelabel error page in the spring boot application?
• How can you implement pagination in a springboot application?
• How to handle a 404 error in spring boot?
• How can Spring Boot be used to implement event-driven architectures?
• What are the basic Annotations that Spring Boot offers?
• Discuss the integration and use of distributed tracing in Spring Boot applications for monitoring and troubleshooting.
• Your application needs to store and retrieve files from a cloud storage service. Describe how you would integrate this functionality into a Spring Boot application.
• To protect your application from abuse and ensure fair usage, you decide to implement rate limiting on your API endpoints. Describe a simple approach to achieve this in Spring Boot.
• For audit purposes, your application requires a "soft delete" feature, where records are marked as deleted instead of being removed from the database. How would you implement this feature in your Spring Boot application?
• You're tasked with building a non-blocking, reactive REST API that can handle a high volume of concurrent requests efficiently. Describe how you would use Spring WebFlux to achieve this.