Spring Framework - Level II

Practice 21 Spring Framework - Level II interview questions with detailed answers. Part of the Spring track on Java Interview Hub.

• Explain the process and significance of the Spring Bean lifecycle. How might understanding this be crucial in a large-scale application?
• What are the differences between ApplicationContext and BeanFactory?
• Mention scenarios where BeanFactory can be used and scenarios where ApplicationContext can be used.
• What is a circular dependency issue?
• Explain different ways provided by Spring Boot to resolve circular dependencies.
• Difference between @Component and @Service. Are these interchangeable?
• Difference between JpaRepository and CrudRepository, and mention the scenario where CrudRepository is used.
• What is the difference between @Qualifier and @Primary, and where is this annotation used? Difference between @Component and @Service. Are these interchangeable?
• Usage of @Transactional annotation.
• What is Spring Profiles? How do you start an application with a certain profile?
• How can you inject properties using environment variables?
• Imagine you have a conflict between beans in your application; how would you resolve it using Spring Boot?
• What happens if multiple AutoConfiguration classes define the same bean?
• Do you prefer using XML or annotations for configuration in Spring applications, and why?
• What is the difference between the @Spy and @Mock annotations in Mockito?
• What is the difference between Joint Point and Point Cuts in Spring AOP.
• What is the use of Spring Batch, have you ever implemented the same, if yes kindly tell me the steps?
• What type of injection use by @Autowired?
• Why constructor injection is recommended over setter-based injection?
• Define AOP, and share its biggest disadvantage.
• How can you prevent cyclic dependency in spring?