Knowledge Factory

Here is a list of 50 Spring Unit Testing interview questions with answers to help you prepare: 1. Basic Questions What is unit testing, and why is it important? Unit testing involves testing individual components of a program to ensure they work as expected. It helps catch bugs early, improves code quality, and facilitates refactoring. What is the difference between unit testing and integration testing? Unit testing focuses on isolated components, while integration testing checks the interaction between multiple components. Why is unit testing critical in Spring applications? Spring applications rely on dependency injection and configurations, so unit testing ensures that beans and dependencies behave correctly in isolation. What are the key annotations for unit testing in Spring? @Test , @MockBean , @ExtendWith , @SpringBootTest , @ContextConfiguration , and @WebMvcTest . What is the purpose of the @SpringBootTest annotation? It loads the full application context, making it suitable...

Hello everyone, today we will go through the most important topics we must prepare for the next spring boot interview. Here is a list of essential Spring topics you should prepare for your next interview,  Click the below link and start learning: Spring Boot Basics Spring MVC Spring Core Spring Security Spring Bean Spring Boot Actuator Spring Data JPA Spring Cloud Spring Webflux Mockito Java 8 Stream Java collection   Hands-On Recipies Spring Boot-Schedule a task with SpringBoot-Download Source Code Configuring a Tomcat Connection pool and Configuring Hikari Connection in Spring Boot Quick Start: Spring Boot Rest Quick Start: Free Marker with Spring Boot Quick Start: JPA Configuration and H2 in-memory database with Spring Boot Quick Start: Mustache with Spring Boot Quick Start: Swagger with Spring Boot Quick Start: Vaadin with Spring Boot Quick Start: Hystrix Circuit Breaker Pattern with Spring Boot Quick Start: Using jetty as the embedded server with Spring Boot Quick Start: ...

1. What is the concept of AOP? Aspect-oriented programming (AOP) is an approach to programming that sanctions the global properties of a program to determine how it is compiled into an executable program. AOP can be utilized with object-oriented programming (OOP). An aspect is a subprogram that is associated with a specific property of a program. More Java interview questions and answers... Spring Boot actuator interview questions and answers Spring Core - Interview Questions Top Spring Cloud Interview Questions Spring Security Interview Questions Spring MVC - Interview Questions Spring Webflux Interview Questions Top Spring Boot Interview Questions Spring Data JPA Interview Questions and Answers Top Mockito Interview Questions and Answers Java Collections Interview Questions Java Stream API Interview Questions and Answers - Frequently asked Quarkus - Interview questions and answers   Spring Interview questions and answers 2. Why do we use AOP? Reduced code clutter Truncated c...

More Java interview questions and answers... Spring Boot actuator interview questions and answers Spring Core - Interview Questions Top Spring Cloud Interview Questions Spring Security Interview Questions Spring MVC - Interview Questions Spring Webflux Interview Questions Top Spring Boot Interview Questions Spring Data JPA Interview Questions and Answers Top Mockito Interview Questions and Answers Java Collections Interview Questions Java Stream API Interview Questions and Answers - Frequently asked Quarkus - Interview questions and answers   Spring Interview questions and answers 1. What is Spring bean? Spring beans are objects which are engendered and managed completely by spring container. Beans can be defined in spring either by utilizing XML configuration or by utilizing Annotation. In XML configuration, bean can be defined utilizing < bean > tag inside < beans > tag. In the Annotation configuration, the bean can be defined utilizing the annotations like @Comp...

More Java interview questions and answers... Spring Boot actuator interview questions and answers Spring Core - Interview Questions Top Spring Cloud Interview Questions Spring Security Interview Questions Spring MVC - Interview Questions Spring Webflux Interview Questions Top Spring Boot Interview Questions Spring Data JPA Interview Questions and Answers Top Mockito Interview Questions and Answers Java Collections Interview Questions Java Stream API Interview Questions and Answers - Frequently asked Quarkus - Interview questions and answers   Spring Interview questions and answers 1. What is the Spring Boot actuator? An actuator is a tool with which we can monitor and manage our application. When the application is pushed into production it provides HTTP endpoints with which we can monitor and get metrics of our application. This monitoring and management information is exposed via REST-like endpoint URLs. 2. Which are the some of important and widely used actuator endpoi...

1. What is Unit Testing? Unit Testing is a method of testing the smallest piece of code called a unit. The main aim is to isolate each unit of the system to identify, analyze and fine-tune the defects.  2. What are the Benefits of Unit Testing?   Reduces bugs when transmuting the existing functionality.  Reduces the Cost of Testing as defects are captured in the very early phase.  Ameliorates design and sanctions better refactoring of code. 3. What is the Mockito framework?   Mockito is a mocking framework. It is a Java-based library used to engender simple and basic test APIs for performing unit testing of Java applications. It can additionally be utilized with other frameworks such as JUnit and TestNG.  4. What is mocking? Mocking is primarily utilized in unit testing. An object under test may have dependencies on other objects. To isolate the behaviour of the object we optate to supersede the other objects by mocks that simulate the behaviour of the real...