Java Spring Interview Questions
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Top 100 Spring Interview Questions and Answers
This book contains basic to expert level Spring interview questions that an interviewer asks. Each question is accompanied with an answer so that you can prepare for job interview in short time. We have compiled this list after attending dozens of technical interviews in top-notch companies like- Google, Facebook, Ebay, Amazon etc.Often, these Spring questions and concepts are used in our daily programming work. But these are most helpful when an Interviewer is trying to test your deep knowledge of Spring.Sample questions are:What are the cases in which Autowiring may not work in Spring framework?Given a choice between declarative and programmatic Transaction Management, which method will you choose?Is it allowed to inject null or empty String values in Spring?What are the different types of events provided by Spring framework?What are the benefits provided by Spring Framework's Transaction Management?What is the difference between DispatcherServlet and ContextLoaderListener in Spring?What is a Java-based Configuration in Spring?What is the difference between Full @Configuration and 'lite' @Beans mode?In Spring framework, what is Annotation-based container configuration?How will you switch on Annotation based wiring in Spring?What are the two ways to enable RequiredAnnotationBeanPostProcessor in Spring?What is @Qualifier annotation in Spring?How Spring framework makes JDBC coding easier for developers?What are the benefits of using Spring DAO?What are the different ways to use Hibernate in Spring?What types of Object Relational Mapping (ORM) are supported by Spring?How will you integrate Spring and Hibernate by using HibernateDaoSupport?What are the different types of the Transaction Management supported by Spring framework?What is Aspect Oriented Programming (AOP)What is an Aspect in Spring?In Spring AOP, what is the main difference between a Concern and a Cross cutting concern?What is a Joinpoint in Spring AOP?What is an Advice in Spring AOP?What are the different types of Advice in Spring AOP?What is a Pointcut in Spring AOP?What is an Introduction in Spring AOP?What is a Target object in Spring AOP?What is a Proxy in Spring AOP?What are the different types of AutoProxy creators in Spring?What is Weaving in Spring AOP?In Spring AOP, Weaving is done at compile time or run time?What is XML Schema-based Aspect implementation?What is Annotation-based aspect implementation in Spring AOP?How does Spring MVC framework work?What is DispatcherServlet?Can we have more than one DispatcherServlet in Spring MVC?What is WebApplicationContext in Spring MVC?What is Controller in Spring MVC framework?What is @Controller annotation in Spring MVC?What is @RequestMapping annotation in Spring?What are the main features of Spring MVC?What is the difference between a Singleton and Prototype bean in Spring?How will you decide which scope- Prototype or Singleton to use for a bean in Spring?What is the difference between Setter and Constructor based Dependency Injection (DI) in Spring framework?What are the drawbacks of Setter based Dependency Injection (DI) in Spring?What are the differences between Dependency Injection (DI) and Factory Pattern?In Spring framework, what is the difference between FileSystemResource and ClassPathResource?Name some popular Spring framework annotations that you use in your project?How can you upload a file in Spring MVC Application'http://www.knowledgepowerhouse.com
Spring Boot Interview Questions and Answers - English
Here are some common Spring Boot interview questions along with their answers: What is Spring Boot? Spring Boot is an open-source Java-based framework used to create stand-alone, production-grade Spring-based applications with minimal setup and configuration. What are the key features of Spring Boot? Some key features include: Auto-configuration: It automatically configures the Spring application based on dependencies present in the class path. Starter dependencies: Pre-configured dependencies to simplify dependency management. Embedded servers: It provides support for embedding servlet containers like Tomcat, Jetty, and Undertow. Production-ready features: It includes features like metrics, health checks, and externalized configuration. Explain the difference between Spring and Spring Boot. Spring is a comprehensive framework for building enterprise-level Java applications, while Spring Boot is an extension of the Spring framework that simplifies the process of building and deploying Spring applications by providing defaults for configuration and eliminating boilerplate code. How does Spring Boot simplify the development process? Spring Boot simplifies development by providing defaults for configuration, reducing the amount of boilerplate code, and offering a range of pre-built features and plugins. What is Spring Boot Starter? Spring Boot Starter is a set of convenient dependency descriptors that you can include in your application. You can add starters to your application's class path, and Spring Boot will automatically configure the appropriate dependencies based on the libraries present. How does Spring Boot handle configuration? Spring Boot uses convention over configuration and auto-configuration to minimize the need for explicit configuration. It provides sensible defaults for configuration and automatically configures components based on the classpath and application properties. What is Spring Boot Actuator? Spring Boot Actuator is a set of production-ready features that help you monitor and manage your application. It includes endpoints for health checks, metrics, info, environment details, and more. Explain the difference between @Component, @Service, @Repository, and @Controller annotations in Spring Boot. @Component is a generic stereotype annotation for any Spring-managed component. @Service is used to mark a class as a service component in the business layer. @Repository is used to mark a class as a data access component in the persistence layer. @Controller is used to mark a class as a controller component in the presentation layer, typically for handling HTTP requests. How does Spring Boot support testing? Spring Boot provides support for unit testing, integration testing, and end-to-end testing using frameworks like JUnit, Mockito, and Spring Boot Test. It includes features like @SpringBootTest annotation for loading Spring application contexts, @MockBean annotation for mocking beans, and TestRestTemplate for testing RESTful endpoints. What is Spring Boot CLI? Spring Boot CLI (Command Line Interface) is a command-line tool that allows you to quickly develop Spring Boot applications using Groovy scripts. It provides features like auto-restart, dependency management, and more, directly from the command line. These questions cover some of the fundamental aspects of Spring Boot that are commonly asked in interviews. Make sure to understand these concepts thoroughly and be prepared to provide examples or elaborate on them during interviews.
Advanced Java Interview Questions and Answers
Java has remained one of the most widely used programming languages in the software industry, with applications ranging from enterprise solutions to web development, mobile applications, and cloud computing. As technology evolves, so do the expectations from Java developers. Companies today seek professionals who possess not only a strong foundation in Java but also expertise in advanced topics such as multithreading, design patterns, performance optimization, microservices, and frameworks like Spring and Hibernate. This book, "Advanced Java Interview Questions & Answers", has been meticulously crafted to help developers and job seekers prepare for Java interviews with confidence. It serves as a comprehensive guide, covering a broad spectrum of advanced Java concepts that are frequently asked in technical interviews. Whether you are a fresher aiming to break into the industry or an experienced developer looking to level up your career, this book will be your go-to resource. Each chapter presents interview questions along with detailed explanations, practical code snippets, and best practices to help you understand the underlying concepts. The questions are structured to reflect real-world problems faced by developers, enabling you to approach interviews with a problem-solving mindset. Additionally, we have included case studies and scenario-based questions to simulate real interview experiences. Our goal is not only to help you crack interviews but also to enhance your Java expertise by reinforcing your knowledge of core and advanced concepts. We encourage you to practice the examples, experiment with code, and explore the additional resources provided in this book. We hope this book serves as a valuable companion in your Java career journey. Happy learning and best of luck with your interviews!