Spring Boot Basics Quiz

1. What is the primary purpose of Spring Boot?

Simplify Spring application setup and reduce boilerplate code

Replace the Spring Framework entirely

Provide only web development tools

Manage database connections exclusively

Spring Boot's primary purpose is to streamline the development process by simplifying the setup of Spring applications. It reduces the amount of boilerplate code required, allowing developers to focus on writing business logic instead of configuration, thus accelerating the development cycle and enhancing productivity.

Explanation

Spring Boot's primary purpose is to streamline the development process by simplifying the setup of Spring applications. It reduces the amount of boilerplate code required, allowing developers to focus on writing business logic instead of configuration, thus accelerating the development cycle and enhancing productivity.

2. Which annotation is used to mark a class as a Spring Boot application?

@Application

@SpringBootApplication

@Boot

@EnableSpring

@SpringBootApplication is a composite annotation that combines three essential annotations: @Configuration, @EnableAutoConfiguration, and @ComponentScan. It marks the class as a Spring Boot application, enabling automatic configuration and component scanning, which simplifies the setup and configuration of Spring applications. This makes it the primary entry point for Spring Boot applications.

Explanation

@SpringBootApplication is a composite annotation that combines three essential annotations: @Configuration, @EnableAutoConfiguration, and @ComponentScan. It marks the class as a Spring Boot application, enabling automatic configuration and component scanning, which simplifies the setup and configuration of Spring applications. This makes it the primary entry point for Spring Boot applications.

3. What does auto-configuration in Spring Boot do?

Automatically configures Spring application based on classpath dependencies

Automatically writes code for you

Removes the need for a main method

Prevents manual configuration entirely

Auto-configuration in Spring Boot simplifies application setup by automatically configuring beans and settings based on the libraries present in the classpath. This means developers can focus on writing business logic without worrying about extensive configuration, as Spring Boot intelligently determines what components are needed for the application to function correctly.

Explanation

Auto-configuration in Spring Boot simplifies application setup by automatically configuring beans and settings based on the libraries present in the classpath. This means developers can focus on writing business logic without worrying about extensive configuration, as Spring Boot intelligently determines what components are needed for the application to function correctly.

4. Which of the following is the default embedded server in Spring Boot?

Apache Tomcat

Jetty

Undertow

GlassFish

Spring Boot uses Apache Tomcat as its default embedded server due to its popularity, robustness, and ease of integration. Tomcat provides a reliable platform for running Java web applications, making it a suitable choice for Spring Boot's microservices architecture, which emphasizes simplicity and rapid development.

Explanation

Spring Boot uses Apache Tomcat as its default embedded server due to its popularity, robustness, and ease of integration. Tomcat provides a reliable platform for running Java web applications, making it a suitable choice for Spring Boot's microservices architecture, which emphasizes simplicity and rapid development.

5. What is dependency injection in Spring?

A design pattern that provides dependencies to a class rather than creating them

Injecting code into SQL queries

A way to add extra libraries to your project

Forcing dependencies to be static

Dependency injection in Spring is a design pattern that promotes loose coupling by allowing a class to receive its dependencies from an external source rather than instantiating them internally. This approach enhances testability, maintainability, and flexibility, as it decouples the class from its dependencies, making it easier to manage and modify them independently.

Explanation

Dependency injection in Spring is a design pattern that promotes loose coupling by allowing a class to receive its dependencies from an external source rather than instantiating them internally. This approach enhances testability, maintainability, and flexibility, as it decouples the class from its dependencies, making it easier to manage and modify them independently.