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Spring Boot Interview Questions and Answers

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Ques 16. How are properties defined in Spring Boot and where?

You can define properties in the application.properties file exists in the classpath.

Example: configure default DataSource bean

database.host=localhost

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Ques 17. What is spring-boot-starter-parent?

It is a special starter which makes Gradle or Maven dependency-management easy by adding jars to your classpath.

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Ques 18. How to enable HTTP/2 supports in Spring Boot?

User can enable HTTP/2 support by using server.http2.enabled configuration property.

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Ques 19. What is a Spring Boot Actuator?

Spring Boot Actuator allows you to monitor and manage your application when you want to push it for the production. It helps you to control your application by using HTTP endpoints.

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-actuator</artifactId>

</dependency>

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Ques 20. How can you access a value defined in the application? What is properties file in Spring Boot?

Use the @Value annotation to access the properties which is defined in the application.properties file.

@Value(”${custom.value}”)
private String customVal;

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