Welcome to our comprehensive 100+ Spring Boot MCQ Questions and Answers series, designed to guide you through the intricate world of Spring Boot, one of the most popular frameworks for building enterprise-grade applications with ease. This series spans 10 sets, encompassing a total of 100 multiple-choice questions that cover the breadth and depth of Spring Boot.

Spring Boot, an extension of the Spring framework, simplifies the development process of stand-alone, production-grade Spring-based Applications that you can "just run". It is known for its ability to auto-configure a Spring application based on the jar dependencies you add to your project, allowing for rapid application development.

From the basics of Spring Boot's architecture, its core principles, and auto-configuration to advanced topics like microservices with Spring Boot, each set in this series is crafted to enhance your understanding and mastery of Spring Boot. Whether you're a beginner eager to dive into the world of application development with Spring Boot or an experienced developer looking to solidify your knowledge and tackle more complex topics, this series has something for you.

The questions are designed to test your knowledge and provide insightful explanations that enrich your learning experience. As you progress from Set 1 to Set 10, you'll gain confidence in your Spring Boot skills, enabling you to leverage their full potential in your projects.

Complete Spring Boot MCQ Questions and Answers series:

Spring Boot MCQ Questions and Answers | Set 1

Spring Boot MCQ Questions and Answers | Set 2

Spring Boot MCQ Questions and Answers | Set 3

Spring Boot MCQ Questions and Answers | Set 4

Spring Boot MCQ Questions and Answers | Set 5

Spring Boot MCQ Questions and Answers | Set 6

Spring Boot MCQ Questions and Answers | Set 7

Spring Boot MCQ Questions and Answers | Set 8

Spring Boot MCQ Questions and Answers | Set 9

Spring Boot MCQ Questions and Answers | Set 10

Embark on this educational journey with our Spring Boot MCQ series and unlock the door to becoming a proficient Spring Boot developer. Whether for interview preparation, certification, or simply to challenge yourself, these sets will provide a comprehensive overview of everything Spring Boot offers.

1. What is the primary goal of Spring Boot?

a) To provide a set of Java APIs for Windows applications

b) To support web development with PHP

c) To create stand-alone, production-grade Spring-based applications

d) To enhance the performance of Java Virtual Machine

Answer:

c) To create stand-alone, production-grade Spring-based applications

Explanation:

Spring Boot is designed to simplify the bootstrapping and development of new Spring applications. Its primary goal is to create stand-alone, production-grade applications quickly and with minimal configuration.

2. Which version of Java is required for Spring Boot 3?

a) Java 8

b) Java 11

c) Java 17

d) Java 21

Answer:

c) Java 17

Explanation:

Spring Boot 3 requires Java 17, ensuring compatibility with newer features and improvements in the Java language.

3. What is the role of @SpringBootApplication annotation in Spring Boot?

a) It is used to define a batch job

b) It is used to mark a configuration class

c) It is a convenience annotation that adds @SpringBootConfiguration, @EnableAutoConfiguration, and @ComponentScan

d) It is used for defining RESTful web services

Answer:

Click to View Answer and Explanation

Explanation:

Answer: c) It is a convenience annotation that adds @SpringBootConfiguration, @EnableAutoConfiguration, and @ComponentScan

4. What is the purpose of Spring Boot Starters?

a) To provide scripts for starting and stopping the application

b) To provide a set of convenient dependency descriptors for a specific type of application

c) To automatically configure security settings

d) To offer a graphical user interface for application configuration

Answer:

b) To provide a set of convenient dependency descriptors for a specific type of application

Explanation:

Spring Boot Starters are a set of convenient dependency descriptors that you can include in your application to get a ready setup for a specific type of technology or infrastructure.

5. Which embedded servlet container is NOT supported by default in Spring Boot?

a) Tomcat

b) Jetty

c) Undertow

d) Apache HTTP Server

Answer:

d) Apache HTTP Server

Explanation:

Spring Boot supports embedded servlet containers like Tomcat, Jetty, and Undertow, but Apache HTTP Server is not an embedded container supported by default.

6. How does Spring Boot simplify Maven configuration?

a) By providing a parent POM for dependency management

b) By eliminating the need for a pom.xml file

c) By automatically generating Maven build scripts

d) By replacing Maven with its own build system

Answer:

a) By providing a parent POM for dependency management

Explanation:

Spring Boot simplifies Maven configuration by offering a parent POM (spring-boot-starter-parent), which provides dependency management and sensible defaults.

7. What versions of Gradle are compatible with Spring Boot 3?

a) Gradle 5.x and 6.x

b) Gradle 6.x only

c) Gradle 7.x (7.5 or later) and 8.x

d) Gradle 4.x and 5.x

Answer:

c) Gradle 7.x (7.5 or later) and 8.x

Explanation:

Spring Boot is compatible with Gradle 7.x (7.5 or later) and 8.x.

8. What is the purpose of Spring Boot Actuator?

a) To provide support for client-side UI development

b) To offer a set of production-ready features to help monitor and manage the application

c) To enable batch processing capabilities

d) To provide ORM (Object-Relational Mapping) support

Answer:

b) To offer a set of production-ready features to help monitor and manage the application

Explanation:

Spring Boot Actuator provides production-ready features, such as health checks, metrics, and environment information, that help you monitor and manage your application.

9. What is the default port for a web application in Spring Boot?

a) 80

b) 443

c) 8080

d) 8000

Answer:

c) 8080

Explanation:

By default, Spring Boot configures embedded servlet containers to listen on port 8080 for web applications.

10. How can you customize the banner in a Spring Boot application?

a) Modifying the application.properties file

b) Adding a banner.txt file in the classpath

c) Writing custom Java code

d) Using the Spring Boot CLI

Answer:

b) Adding a banner.txt file in the classpath

Explanation:

To customize the banner displayed on startup, you can add a banner.txt file to your classpath, and Spring Boot will automatically use it as the application banner.