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200+ Questions and Answers on Spring, Spring Boot and Spring MVC
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Spring Interview Guide - 200+ Questions and Answers
Spring Framework is the most popular Java Framework ever. It continues to evolve with changing architectures. Spring Boot is one of the most popular Spring projects. Spring Boot is the most used Java framework to develop RESTful Services and Microservices. Preparing for Spring Interview is tricky. There are wide variety of Spring Modules and Spring Projects you would need to recollect and be prepared to answer questions on.You would need to get a good understanding of the new features of Spring and have firm grasp of the concepts you implemented in your projects. This course helps you prepare for Spring Interview with code examples covering 200+ Spring Interview Questions and Answers on Spring, Spring Boot, Spring MVC, Spring JDBC, JPA, AOP, RESTful Services and SOAP Web Services. List of questions discussed about each topic is listed below.
Spring
What is Loose Coupling? What is a Dependency?
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What is IOC (Inversion of Control)? What is Dependency Injection? Can you give few examples of Dependency Injection? What is Auto Wiring? What are the important roles of an IOC Container? What are Bean Factory and Application Context? Can you compare Bean Factory with Application Context? How do you create an application context with Spring? How does Spring know where to search for Components or Beans? What is a Component Scan? How do you define a component scan in XML and Java Configurations? How is it done with Spring Boot? What does @Component signify? What does @Autowired signify? What’s the difference Between @Controller, @Component, @Repository, and @Service Annotations in Spring? What is the default scope of a bean? Are Spring beans thread safe? What are the other scopes available? How is Spring’s singleton bean different from Gang of Four Singleton Pattern? What are the different types of dependency injections? What is setter injection? What is constructor injection? How do you choose between setter and constructor injections? What are the different options available to create Application Contexts for Spring? What is the difference between XML and Java Configurations for Spring? How do you choose between XML and Java Configurations for Spring? How does Spring do Autowiring? What are the different kinds of matching used by Spring for Autowiring? How do you debug problems with Spring Framework? How do you solve NoUniqueBeanDefinitionException? How do you solve NoSuchBeanDefinitionException? What is @Primary? What is @Qualifier? What is CDI (Contexts and Dependency Injection)? Does Spring Support CDI? Would you recommed to use CDI or Spring Annotations? What are the major features in different versions of Spring? What are new features in Spring Framework 4.0? What are new features in Spring Framework 5.0? What are important Spring Modules? What are important Spring Projects? What is the simplest way of ensuring that we are using single version of all Spring related dependencies? Name some of the design patterns used in Spring Framework? What do you think about Spring Framework? Why is Spring Popular? Can you give a big picture of the Spring Framework?
Spring MVC
What is a profile? How do you define beans for a specific profile? How do you create application configuration for a specific profile? How do you have different configuration for different environments? What is Spring Boot Actuator? How do you monitor web services using Spring Boot Actuator? How do you find more information about your application envrionment using Spring Boot? What is a CommandLineRunner?
Database Connectivity - JDBC, Spring JDBC & JPA
What is Spring JDBC? How is different from JDBC? What is a JdbcTemplate? What is a RowMapper? What is JPA? What is Hibernate? How do you define an entity in JPA? What is an Entity Manager? What is a Persistence Context? How do you map relationships in JPA? What are the different types of relationships in JPA? How do you define One to One Mapping in JPA? How do you define One to Many Mapping in JPA? How do you define Many to Many Mapping in JPA? How do you define a datasource in a Spring Context? What is the use of persistence.xml How do you configure Entity Manager Factory and Transaction Manager? How do you define transaction management for Spring – Hibernate integration?
Spring Data
What is Spring Data? What is the need for Spring Data? What is Spring Data JPA? What is a CrudRepository? What is a PagingAndSortingRepository?
Unit Testing
How does Spring Framework Make Unit Testing Easy? What is Mockito? What is your favorite mocking framework? How do you do mock data with Mockito? What are the different mocking annotations that you worked with? What is MockMvc? What is @WebMvcTest? What is @MockBean? How do you write a unit test with MockMVC? What is JSONAssert?
How do you write an integration test with Spring Boot? What is @SpringBootTest? What is @LocalServerPort? What is TestRestTemplate?
AOP
What are cross cutting concerns? How do you implement cross cutting concerns in a web application? If you would want to log every request to a web application, what are the options you can think of? If you would want to track performance of every request, what options can you think of? What is an Aspect and Pointcut in AOP? What are the different types of AOP advices? What is weaving? Compare Spring AOP vs AspectJ?
SOAP Web Services
What is a Web Service? What is SOAP Web Service? What is SOAP? Waht is a SOAP Envelope? What is SOAP Header and SOAP Body? Can you give an example of SOAP Request and SOAP Response? What is a SOAP Header? What kind of information is sent in a SOAP Header? Can you give an example of a SOAP Header with Authentication information? What is WSDL (Web Service Definition Language)? What are the different parts of a WSDL? What is Contract First Approach? What is an XSD? Can you give an example of an XSD? What is JAXB? How do you configure a JAXB Plugin? What is an Endpoint? Can you show an example endpoint written with Spring Web Services? What is a MessageDispatcherServlet? How do you configure a MessageDispatcherServlet? How do you generate a WSDL using Spring Web Services? How do you implement error handling for SOAP Web Services? What is a SOAP Fault?
RESTful Web Services
What is REST? What are the key concepts in designing RESTful API? What are the Best Practices of RESTful Services? Can you show the code for an example Get Resource method with Spring REST? What happens when we return a bean from a Request Mapping Method? What is GetMapping and what are the related methods available in Spring MVC?
Running Examples
Download the zip or clone the Git repository. Unzip the zip file (if you downloaded one) Open Command Prompt and Change directory (cd) to folder containing pom.xml Open Eclipse File -> Import -> Existing Maven Project -> Navigate to the folder where you unzipped the zip Select the right project Choose the Spring Boot Application file (search for file with @SpringBootApplication) Right Click on the file and Run as Java Application You are all Set For help : use our installation guide - https://www.youtube.com/playlist? list=PLBBog2r6uMCSmMVTW_QmDLyASBvovyAO
What Will I Learn?
You will learn to answer 200 interview questions on Spring, Spring Boot and Spring MVC You will learn to answer questions on basics of JPA, Spring Data, Spring Data JPA, Spring AOP You will learn to answer questions on RESTful Web Services and SOAP Web Services with Spring & Spring Boot You will learn to answer questions on basics of Spring Framework - IOC, Application Context, Dependency Injection, Scope and Component Scan You will learn about Spring Annotations - @Component, @Service, @Repository, @Controller, @Autowired, @Primary, @Qualifier, @Configuration You will understand basic features of Spring Boot - Starters, Auto Configuration, Actuator and Externalized Configuration You will be introduced to the Best Practices in using Spring and Spring Boot You will be introduced to the approaches to handle validation errors with Spring MVC and Spring REST You will be introduced to the approaches for Versioning, Content Negotiation with RESTful Services You will understand the best practices in documenting your RESTful Services with Swagger
Requirements
We use Eclipse as the IDE to demonstrate 100 code examples You should have some programming experience with Java and Spring
Who is the target audience?
You are learning Java You are learning Spring You want to attend Java & Spring Interviews You want to add more depth to your Spring Knowledge
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