40 Possible Questions for an Interview in Spring (With Answers)
Part of the hiring process is an interview. It gives the hiring manager a chance to learn more about each candidate and decide if they are a good fit for the job. For some jobs, interviewers might ask technical questions that let candidates show what they know. In the tech industry, interview questions are often more difficult and ask about specific skills and technical processes. Questions for an Interview in Spring
In this article, we’ll talk about some of the questions you might be asked at an interview for a job working with the Spring framework and show you how to answer them.
Here are some examples of spring job interview questions and answers
Review some of the Spring interview questions you might be asked if you apply for a job that fits this framework, as well as some sample answers, to help you feel more prepared.
1. How long have you been working with Spring?
Example: “At my last job, I used the Spring open source development framework to build Java apps. I found that the framework made it easier for me to work with Java development and helped me get better at programming.
2.What Spring framework models have you used?
Example: “I’ve used all of the main core modules in the Spring framework, like core, context, bean, expression language, OXM, ORM, JDBC, web, Java Messaging Service, and transaction.”
3.Can you tell me what the Spring IoC container is and what it does?
Example: “The Spring IoC container is an important part of the framework that is in charge of making the main objects, putting them together, and setting them up. This container also helps with dependency injection and managing the full lifecycle of important objects in applications.
4.In your opinion, what are the benefits of using Spring IoC?
Example: “I’ve found that by using the Spring IoC container, I can write less code for an application and test it more quickly and easily. When I use the unit testing method, I don’t have to use JNDI lookup or singleton lookup.”
5. What kinds of bean scopes does Spring use?
Example: “The Spring framework supports several bean scopes, like singleton, prototype, session, request, and global-session. The framework is set up so that the default is the singleton bean scope.”
6.What do Spring’s bean scopes do?
Example: “In Spring, the default singleton bean scope only works with one instance per container. The scope of the definition is limited to an HTTP request by the request scope. Any number of object instances can be part of the prototype scope. This scope only works inside a Spring ApplicationContext that knows about the web. With the global session scope, the definition is limited to a global HTTP session. With the standard session scope, the definition is limited to any HTTP session. Both of these work just as well in a Spring ApplicationContext.”
7. Describe how a Spring bean grows and changes over time.
“There are several steps in the lifecycle of a Spring bean that is built into the framework. Some of these are instantiation, setting up the properties, calling the set Bean name method with the BeanNameAware method, and calling the set Bean factory method with the BeanFactoryAware method. Then, inside ApplicationContextAware, you call set Application Context. The next step is the pre-initialization of the bean post processor. From there, you call the bean’s “after properties set” initialization method and take care of a custom initialization method. After the post-initialization step is taken care of by the bean post processor, the bean is ready to be used.
Since Spring doesn’t take care of a prototype’s entire lifecycle, you don’t need a custom method to destroy the bean when using a prototype bean.
8. Which parts of the life cycle of a spring bean can be changed or left out?
“Using interfaces like “InitializingBean,” “DisposableBean,” “BeanFactoryAware,” “ApplicationContextAware,” and “BeanNameAware,” a developer can control how a bean acts.
9.What are the three versions of Spring’s most important differences?
Example: “Spring 2.5 was the first version of the framework to support annotations. Spring 3.0 came out after two years. It added support for JEE6 and included the changes made to Java 5. Spring 4.0 is the most recent version, and it works well with Java 8.”
10.Spring has how many modules?
“Spring is made up of about 20 main modules, which are split into six main groups. Some of the categories include Data Access/Integration, Core Container, Aspect Oriented Programming (AOP), Test, Instrumentation, and the Web.
11. Explain how the Spring core container group modules are used.
Example: “The core container, which is made up of Spring Core, Spring Bean, Spring Context, and Spring Expression Language, is the most important grouping of Spring’s modules. It is used to make the main structure of the module.”
12. Describe how the modules in the category “Spring data access/integration” work.
Example: “The data access and integration category helps you use Spring’s database. It has modules like Java DataBase Connectivity, Object XML Mappers, transactions, Java Messaging Service, and Object Relational Mapping.”
13. Explain what the Spring AOP (Aspect-Oriented Programming) modules are and how they are used.
Example: “The AOP category is a layer that lets you put the code in different places. It comes with Pointcuts, Advices, and other tools.”
14. Tell me how the modules in the Spring test category are used.
“When you need to test the application or framework, you can use this category, which works with TestNG and Junit.”
15. Describe what the Spring instrumentation modules are and how they are used.
“The instrumentation category is a layer that helps implement both classloader instrumentation and class instrumentation.”
16. Tell me how the modules in the Spring web category are used.
Example: “In the Spring web category, you have access to help that lets you make web-based applications. It has web-portlets, web-sockets, web-MVC, and web modules.”
17. What is a file that is used to set up Spring?
“A configuration file in Spring is an XML file that has information about classes. The file explains how the classes are set up and how they interact with each other.”
18.What can you do with the Spring framework?
Example: “The Spring framework is flexible and can be used for remote access, as a web application, as an Enterprise Java Bean, and as a third-party web framework. You can wrap Plain Old Java Objects when you use Spring as an Enterprise Java Bean.
19. Tell me what dependency injection is and what it has to do with Spring.
Example: “Dependency injection is a part of the Spring framework that lets you tell how each object should be made. This means you don’t have to make objects.” The IoC will then connect them based on how the code describes the objects.”
20.What are the three most common ways to deal with Spring’s dependency injection?
Example: “The constructor, the interface, and the setter are the three main ways to do dependency injection.”
21. Describe the difference between setter dependency injection and construction dependency injection.
Example: “Constructor injection doesn’t support partial injection, but setter does. The setter property will take precedence over the constructor property, but the constructor property will not take precedence over the setter property. When you have less properties, Setter works better. When changes are made to the constructor, new instances are made. This is not the case when the setter is used.
22. Which types of Spring IoC containers are most often used?
“In Spring, the most important IoC containers are BeanFactory and ApplicationContext.”
23. Explain the ApplicationContext IoC container.
“ApplicationContext uses aggressive or eager initialization, and it does support internalization and annotation-based dependency.”
24. Describe what the BeanFactory IoC container is and how it works.
“BeanFactory is an interface that the framework sets up. It uses lazy initialization, gives you a resource object through syntax, and doesn’t support dependency or internalization based on annotations.
25.Why would you want to use Spring’s Inversion of Control?
Example: “Using IoC in Spring cuts down on the amount of code in the application and makes it easier for it to be loosely coupled.” It also makes it easier to test the code for an app and lets services load slowly.
26. How does Spring tell the container about the configuration?
Example: “In Spring, configuration data is sent to the container in three main ways: through XML, through annotations, and through Java.”
27. Describe how configuring XML works.
“XML-based configuration uses the XML configuration files to figure out what services and dependencies beans need.”
28. Explain how configuration works when annotations are used.
Example: “The bean is set up as its own component class using annotations on the related class method.” The Spring configuration file must be changed to allow this.
29. Explain how to set up Java.
“The @Bean annotated methods and the @Configuration annotated classes are the two most important parts of the new Java-based configuration support.”
30. What are inner spring beans?
“A bean is an inner bean if it is owned by another bean.”
31. How many different ways does bean auto-wiring work?
“No, the modes that can be used for bean auto-wiring in Spring are byName, constructor, autodetect, and byType.”
32. How far can auto-wiring beans go?
“Spring’s auto-wiring is limited because it can be turned off, it can be confusing and lose accuracy, and it only works with primitive data types like classes and strings.
33. How do you turn on annotation wiring in Spring?
Example: “To use this feature, you need to turn on annotation wiring in Spring. You can do this by adding the context:annotation-config element to the configuration files.”
34.What kind of support does Spring DAO have?
Example: “JDO, Hibernate, and JDBC are easier to use because Spring DAO supports them. This support module also makes it easier to use these technologies because you don’t have to worry about catching exceptions that are specific to each one.
35. What classes are in the Spring JDBC API?
For instance, “The JDBC API in Spring classes includes JDBCTemplate, SimpleJDBCCall, SimpleJDBTemplate, SimpleJDBCInsert, and NamedParameterJDBCTemplate.”
36.What are the two ways that Spring can handle transactions?
“There are two main types of transaction management that Spring supports: declarative transaction management and programming transaction management.”
37. Talk about how declarative transaction management works in Spring.
“Spring’s declarative transaction management separates the transaction from the business code by using configurations and annotations based on XML.”
38. Tell me how to use the programming language Spring to handle transactions.
“Spring transaction management programming gives you more freedom in programming, but it’s harder to keep up with.”
39. Which Object-Relational Mappers (ORMs) does Spring support?
“Spring works with OJB, HiberNate, iBATIS, JDO, and Oracle Toplink,” for example.
40. Explain what Advice means using the Spring framework.
Advice in Spring is something that an aspect does at a certain join point. Spring’s AOP uses pieces of advice as “interceptors” to keep a chain going around that “join point.”