Welcome to Set 2 of our engaging Spring Boot MCQ Questions and Answers series. Building upon the foundational knowledge you've gained from Set 1, this collection delves deeper into the Spring Boot, preparing you for even more advanced topics covered in Set 3.
Navigate through the complete Spring Boot MCQ Questions and Answers series:
11. What is the use of the spring-boot-starter-web dependency?
a) To support desktop application development
b) To provide basic web and RESTful development support
c) To enable WebSocket functionality
d) To add support for batch processing
Answer:
b) To provide basic web and RESTful development support
Explanation:
The spring-boot-starter-web starter includes all the dependencies needed for building web and RESTful applications with Spring Boot.
12. Which component in Spring Boot auto-configures a DataSource based on the classpath settings?
a) DataSourceConfig
b) DataSourceAutoConfiguration
c) JdbcTemplate
d) HibernateTemplate
Answer:
b) DataSourceAutoConfiguration
Explanation:
DataSourceAutoConfiguration in Spring Boot auto-configures a DataSource bean based on the classpath settings and the properties defined in the application.properties file.
13. What is the purpose of the spring-boot-starter-test dependency?
a) To provide support for testing Spring Boot applications
b) To enable live testing of web applications
c) To offer a testing framework for database operations
d) To integrate external testing tools
Answer:
a) To provide support for testing Spring Boot applications
Explanation:
The spring-boot-starter-test starter includes dependencies useful for testing Spring Boot applications, such as JUnit, Spring Test, and Mockito.
14. Which embedded servlet container is supported by default in Spring Boot?
a) Apache HTTP Server
b) Tomcat
c) Microsoft IIS
d) Nginx
Answer:
b) Tomcat
Explanation:
Spring Boot provides default support for the Tomcat embedded servlet container. It simplifies web application development by embedding Tomcat directly in the application.
15. How can you run a Spring Boot application?
a) By using the Java -jar command with the application's JAR file
b) By deploying it on a web server like Apache Tomcat
c) By executing a main method in an IDE
d) All of the above
Answer:
d) All of the above
Explanation:
A Spring Boot application can be run in multiple ways, including using the Java -jar command with the built JAR file, running the main method in an IDE, or deploying it to a web server.
16. What is the primary use of the @ComponentScan annotation in Spring Boot?
a) To scan for Spring components and configurations
b) To configure the application's security settings
c) To define database entities
d) To configure message sources for internationalization
Answer:
a) To scan for Spring components and configurations
Explanation:
The @ComponentScan annotation in Spring Boot is used to specify the packages to scan for annotated components. It enables Spring to detect and register your components, configurations, services, etc.
17. What is the use of @Autowired annotation in Spring Boot?
a) Injects property values from the application.properties file
b) Provides database connectivity
c) Automatically wires beans into properties, constructors, or methods
d) Initializes application components
Answer:
c) Automatically wires beans into properties, constructors, or methods
Explanation:
The @Autowired annotation in Spring Boot is used to automatically inject dependency. Spring automatically injects beans into the fields, constructors, or methods where @Autowired is used.
18. What is the use of @Entity annotation in Spring Boot?
a) To define a REST controller
b) To declare a JPA entity
c) To create a scheduled task
d) To define a component scan path
Answer:
b) To declare a JPA entity
Explanation:
The @Entity annotation in Spring Boot is used with JPA to define an entity, a class that maps to a database table.
19. What is the role of the spring-boot-starter-data-jpa dependency?
a) To support Java Messaging Service (JMS)
b) To provide Java Persistence API (JPA) integration
c) To enable Spring Security features
d) To integrate with Apache Kafka
Answer:
b) To provide Java Persistence API (JPA) integration
Explanation:
The spring-boot-starter-data-jpa is a starter for using Spring Data JPA with Hibernate. It simplifies the configuration and usage of JPA for database interaction in Spring Boot applications.
20. What is the use of @SpringBootTest annotation?
a) To create batch jobs
b) To configure application security
c) To support testing with a Spring application context
d) To manage application properties
Answer:
c) To support testing with a Spring application context
Explanation:
The @SpringBootTest annotation in Spring Boot is used in testing. It provides a way to start a full Spring application context in the test, which is useful for integration tests.
What's Next?
Complete Spring Boot MCQ Questions and Answers series:
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