{"id":25098,"date":"2024-06-01T21:05:11","date_gmt":"2024-06-01T15:35:11","guid":{"rendered":"https:\/\/leverageedu.com\/explore\/?p=25098"},"modified":"2024-06-01T21:05:11","modified_gmt":"2024-06-01T15:35:11","slug":"top-70-spring-boot-interview-questions","status":"publish","type":"post","link":"https:\/\/leverageedu.com\/explore\/career-counselling\/top-70-spring-boot-interview-questions\/","title":{"rendered":"Top 70 Spring Boot Interview Questions"},"content":{"rendered":"\n

Spring Boot is a powerful framework that makes developing Spring applications easier and faster. As a developer, you can create Spring Boot by following many configuration steps required to set up a general Spring application. <\/p>\n\n\n\n

To show your skills and expertise on the Top Spring Boot topics in big organisations, you need to prepare well for Top Spring Boot interview questions from scratch. We have listed down 70 Spring Boot Interview questions into different categories to make your preparation smoother.<\/p>\n\n\n\n\n\n\n

Questions based on Spring Boot<\/span><\/h2>\n\n\n\n

Find 10 questions and answers related to the Introduction<\/strong> in Spring Boot Interview Questions:<\/p>\n\n\n\n

\"Questions<\/figure>\n\n\n\n
Question 1: What is Spring Boot?<\/strong>

Answer: <\/strong>Spring Boot is a framework that simplifies the development of Java applications by providing pre-configured setups and reducing the need for boilerplate code.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 2: How do you create a Spring Boot application?<\/strong>

Answer<\/strong>: Create a Spring Boot application using Spring Initializr, which generates a project with the necessary dependencies and structure.\u00a0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 3: What is the purpose of the \u00b4@SpringBootApplication\u00b4 annotation?<\/strong>

Answer:<\/strong> The \u00b4@SpringBootApplication\u00b4 annotation marks the main class of a Spring Boot application. It combines three annotations: \u00b4@EnableAutoConfiguration\u00b4, \u00b4@ComponentScan\u00b4, and \u00b4@Configuration\u00b4.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 4: How does Spring Boot manage dependencies?<\/strong>

Answer: <\/strong>Spring Boot uses Maven or Gradle for dependency management. It provides starters, which are sets of convenient dependency descriptors you can include in your project.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 5:<\/strong> What is the use of the \u00b4application.properties\u00b4 file?<\/strong>

Answer:<\/strong> The \u00b4application.properties\u00b4 file is used to configure various settings for your Spring Boot application, such as server port, database connection, and logging levels.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 6:<\/strong> How do you change the default port of a Spring Boot application?<\/strong>

Answer:<\/strong> Change the default port by adding the following line to your \u00b4application.properties\u00b4 file:\"<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 7:<\/strong> What is the purpose of Spring Boot starters?<\/strong>

Answer: <\/strong>Spring Boot starters are pre-defined dependency packages that simplify the inclusion of related dependencies. For example, \u00b4spring-boot-starter-web\u00b4 includes all necessary dependencies for a web application.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 8: How do you run a Spring Boot application?<\/strong>

Answer:<\/strong> You can run a Spring Boot application by executing the \u00b4main\u00b4 method of your main class (annotated with \u00b4@SpringBootApplication\u00b4). Alternatively, you can use the \u00b4mvn spring-boot:run\u00b4 or \u00b4gradle bootRun\u00b4 command.
\"How<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 9: What is Spring Boot Actuator?<\/strong>

Answer:<\/strong> Spring Boot Actuator provides production-ready features such as monitoring and management through endpoints. It helps you understand and manage your application in real-time.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 10: How do you handle exceptions in a Spring Boot application?<\/strong>

Answer: <\/strong>Handle exceptions in a Spring Boot application using the \u00b4@ControllerAdvice\u00b4 and \u00b4@ExceptionHandler\u00b4 annotations. These allow you to create global exception handlers for your application.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Also Read:<\/strong> 10 Advantages of the Ability to Work Independently<\/strong><\/a><\/p>\n\n\n\n

Core Concept Questions<\/span><\/h2>\n\n\n\n

Find 10 questions and answers related to Core Concepts Questions<\/strong> in Spring Boot Interview Questions:<\/p>\n\n\n\n

\"Core<\/figure>\n\n\n\n
Question 1: What is auto-configuration in Spring Boot?<\/strong>

Answer:<\/strong> Auto-configuration in Spring Boot automatically configures your Spring application based on the dependencies you have added. It tries to guess the best configuration for your needs.\u00a0
For example, if you include the `spring-boot-starter-web` dependency, Spring Boot will automatically set up a web server and other necessary components like a dispatcher servlet, view resolver, etc., without needing much manual configuration.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 2: How do you create a RESTful web service using Spring Boot?<\/strong>

Answer: <\/strong>To create a RESTful web service in Spring Boot:

1. Create a Spring Boot project: <\/strong>Use Spring Initializr (start.spring.io) to generate a new project with the `spring-boot-starter-web` dependency.

2. Define a Controller:<\/strong> Create a class annotated with `@RestController` to handle HTTP requests.

3. Map endpoints: <\/strong>Use `@GetMapping`, `@PostMapping`, etc., to map HTTP methods to specific methods in your controller.
“`java
@RestController
@RequestMapping(“\/api”)public class MyController {\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
@GetMapping(“\/greet”)\u00a0\u00a0\u00a0\u00a0
public String greet() {\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
return “Hello, World!”;\u00a0\u00a0\u00a0\u00a0
}
}
“`<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Question 3: What is Spring Boot DevTools?<\/strong>

Answer:<\/strong> Spring Boot DevTools is a module that helps with the development process. It provides features like automatic restarts, live reload, and configurations that are only useful during development.\u00a0
When you change a file, DevTools will automatically restart the application, so you don’t have to do it manually.
<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Question 4: How do you connect a Spring Boot application to a database?<\/strong>

Answer: <\/strong>To connect a Spring Boot application to a database:

1. Add dependencies: <\/strong>Include `spring-boot-starter-data-jpa` and the appropriate database driver in your `pom.xml`.
2. Configure the database:<\/strong> Add database connection details (URL, username, password) in `application.properties` or `application.yml`.
3. Create a JPA entity:<\/strong> Define a class annotated with `@Entity` representing a table in the database.
4. Create a repository: <\/strong>Define an interface that extends `JpaRepository`.

Example of configuration in `application.properties`:<\/strong>
“`properties
spring.datasource.url=jdbc:mysql:\/\/localhost:3306\/mydb
spring.datasource.username=root
spring.datasource.password=rootpassword
spring.jpa.hibernate.ddl-auto=update“`


<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Question 5: What is Spring Data JPA in Spring Boot?<\/strong>
Answer: <\/strong>Spring Data JPA is a part of Spring Data, which makes it easier to implement JPA-based repositories.
\u00a0It reduces the boilerplate code required for data access and provides powerful methods to interact with the database. By extending `JpaRepository`, you get CRUD operations and the ability to define custom queries.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 6: How do you secure a Spring Boot application?<\/strong>
Answer:<\/strong> To secure a Spring Boot application:

1. Add security dependency: <\/strong>Include `spring-boot-starter-security` in your project.
2. Configure security:<\/strong> Create a class that extends `WebSecurityConfigurerAdapter` and override
its methods to define security rules.


Example:<\/strong>
“`java<\/strong>
@Configuration<\/strong>
@EnableWebSecurity<\/strong>
public class SecurityConfig extends WebSecurityConfigurerAdapter {        <\/strong>
@Override    <\/strong>
protected void configure(HttpSecurity http) throws Exception{        <\/strong>
http            <\/strong>
.authorizeRequests()            <\/strong>
.antMatchers(“\/public\/**”).permitAll()            <\/strong>
.anyRequest().authenticated()           <\/strong>
.and()            <\/strong>
.formLogin()            <\/strong>
.loginPage(“\/login”).permitAll()            <\/strong>
.and()            <\/strong>
.logout().permitAll();<\/strong>
    }<\/strong>
}<\/strong>
“`<\/strong>
<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 7. What is the difference between \u00b4@Component\u00b4, \u00b4@Service\u00b4, and \u00b4@Repository\u00b4 in Spring Boot?<\/strong>

Answer. Here is the difference between \u00b4@Component\u00b4, \u00b4@Service\u00b4, and \u00b4@Repository\u00b4 in Spring Boot.<\/strong>

\u00b4@Component`: <\/strong>A generic stereotype for any Spring-managed component. It’s a general-purpose annotation.

`@Service`: A specialization of `@Component`, it indicates that the class contains business logic.

`@Repository`: Also a specialization of `@Component`, it indicates that the class is responsible for data access and might catch database exceptions and translate them into Spring’s DataAccessException.
<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 8: How does Spring Boot handle externalized configuration?<\/strong>

Answer:<\/strong> Spring Boot handles externalized configuration by allowing you to define settings in `application.properties` or `application.yml`. These files can reside in different locations and be overridden by environment variables, command-line arguments, or other property sources.

Example `application.properties`:<\/strong>
“`properties
server.port=8081
spring.datasource.url=jdbc:mysql:\/\/localhost:3306\/mydb“`<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Question 9: What is the purpose of the \u00b4@SpringBootTest\u00b4 annotation?<\/strong>

Answer: <\/strong>`@SpringBootTest` is used in testing to indicate that the application context should be loaded for the test. It provides a comprehensive test environment that mimics the real application context, allowing you to write integration tests that verify the behavior of your application.
<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 10. How do you enable scheduling in a Spring Boot application?<\/strong>

Answer.<\/strong> To enable scheduling in a Spring Boot application:

1. Enable scheduling:<\/strong> Add `@EnableScheduling` to a configuration class.
2. Create a scheduled task:<\/strong> Use `@Scheduled` on methods that should run periodically.

Example:<\/strong>
“`java<\/strong>
@Configuration<\/strong>
@EnableScheduling<\/strong>
public class SchedulingConfig {<\/strong>
}<\/strong>
@Component <\/strong>
public class MyScheduledTask {\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/strong>
@Scheduled(fixedRate = 5000)<\/strong>
\u00a0\u00a0\u00a0\u00a0public void performTask() {<\/strong>
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(“Task executed at ” + new Date());<\/strong>
\u00a0\u00a0\u00a0\u00a0}}<\/strong>
“`<\/strong>
This setup will execute `performTask` every 5 seconds.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Also Read: <\/strong>Team Work vs Individual Work<\/strong><\/a><\/p>\n\n\n\n

Question on Spring Boot Starters<\/span><\/h2>\n\n\n\n

Find 10 questions and answers related to Question on Spring Boot Starters<\/strong> in Spring Boot Interview Questions:<\/p>\n\n\n\n

\"Question<\/figure>\n\n\n\n
Question 1: What are Spring Boot Starters?<\/strong>

Answer:<\/strong> Spring Boot Starters are a set of convenient dependency descriptors that you can include in your project to get a ready-to-use set of libraries for common tasks, like building web applications or accessing databases.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 2: Why should you use Spring Boot Starters?<\/strong>

Answer: <\/strong>You should use Spring Boot Starters to save time and reduce the hassle of manually specifying and configuring dependencies. They provide a quick and easy way to set up common functionalities.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 3: What is the \u00b4spring-boot-starter-web\u00b4 starter used for?<\/strong>

Answer: <\/strong>The \u00b4spring-boot-starter-web\u00b4 starter is used to build web applications. It includes dependencies for Spring MVC, RESTful services, and embedded servers like Tomcat.
<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 4: How do you add a Spring Boot Starter to your project?<\/strong>

Answer:<\/strong> You add a Spring Boot Starter to your project by including it in your pom.xml (for Maven) or build.gradle (for Gradle) file. For example, to add spring-boot-starter-web using Maven:
\"<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 5:<\/strong> What is the \u00b4spring-boot-starter-data-jpa\u00b4 starter?

Answer: <\/strong>The \u00b4spring-boot-starter-data-jpa\u00b4 starter is used to include Spring Data JPA, Hibernate, and other necessary libraries to work with relational databases using JPA (Java Persistence API).<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 6:<\/strong> What does the \u00b4spring-boot-starter-test\u00b4 starter provide?

Answer: <\/strong>The \u00b4spring-boot-starter-test\u00b4 starter provides dependencies for testing Spring Boot applications, including JUnit, Hamcrest, and Mockito. It makes it easier to write and run tests.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 7: How do Spring Boot Starters simplify dependency management?<\/strong>

Answer. <\/strong>Spring Boot Starters simplify dependency management by grouping commonly used dependencies into a single starter package, reducing the need to specify each dependency individually.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 8: What is the \u00b4spring-boot-starter-security\u00b4 starter?<\/strong>

Answer:<\/strong> The \u00b4spring-boot-starter-security\u00b4 starter is used to add Spring Security to your project. It provides security features such as authentication, authorization, and protection against common attacks.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 9: Can you create your own custom Spring Boot Starter?<\/strong>

Answer:<\/strong> Yes, you can create your own custom Spring Boot Starter by defining a new module with a \u00b4pom.xml\u00b4 or \u00b4build.gradle\u00b4 file that includes the desired dependencies and configurations. This custom starter can then be reused across multiple projects.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 10: What is the spring-boot-starter-actuator starter used for?<\/strong>

Answer: <\/strong>The \u00b4spring-boot-starter-actuator\u00b4 starter is used to add production-ready features to your application, such as monitoring, metrics, and health checks. It provides endpoints to help manage and monitor your application in real time.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Also Read: <\/strong>How to Answer, \u2018What Type of Work Environment Do You Prefer?\u2019<\/strong><\/a><\/p>\n\n\n\n

Spring Boot Configuration Question<\/span><\/h2>\n\n\n\n

Find 10 questions and answers related to Spring Boot Configuration Question<\/strong> in Spring Boot Interview Questions:<\/p>\n\n\n\n

\"Spring<\/figure>\n\n\n\n

Question 1:<\/strong> What is the purpose of the \u00b4application.properties\u00b4 file in Spring Boot?<\/strong>

Answer:<\/strong> The \u00b4application.properties\u00b4 file is used to configure various settings in a Spring Boot application, such as server port, database connection details, and custom application properties.
<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 2: How do you change the server port in a Spring Boot application?<\/strong>

Answer: <\/strong>You change the server port by adding the following line to the \u00b4application.properties\u00b4 file:
\"How<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 3: What is the difference between \u00b4application.properties\u00b4 and \u00b4application.yml\u00b4?<\/strong>

Answer: <\/strong>\u00b4Application.properties\u00b4 and \u00b4application.yml\u00b4 are used for configuration in Spring Boot. The difference lies in their format: \u00b4application.properties\u00b4 uses key-value pairs, while \u00b4application.yml\u00b4 uses YAML syntax, which can be more readable and supports hierarchical data.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 4: How do you configure a Spring Boot application to connect to a MySQL database?<\/strong>

Answer: <\/strong>Add the MySQL driver dependency to \u00b4pom.xml\u00b4 and configure the data source in \u00b4application.properties\u00b4.
\"How<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 5: How can you set up an embedded server (like Tomcat) in a Spring Boot application?<\/strong>

Answer: <\/strong>Spring Boot uses an embedded server by default. Form Tomcat, simply include the \u00b4spring-boot-starter-web\u00b4 dependency in your \u00b4pom.xml\u00b4
\"<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 6: How do you externalize configuration in a Spring Boot application?<\/strong>

Answer:<\/strong> You can externalize configuration using \u00b4application.properties\u00b4 or \u00b4application.yml\u00b4 files, environment variables, command-line argument, or Spring Cloud Config for centralized configuration.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 7: How do you profile-specific properties in Spring Boot?<\/strong>

Answer:<\/strong> Define profile-specific properties files like \u00b4application-dev.properties\u00b4 and \u00b4application-prod.properties.\u00b4 Activate a profile by setting the \u00b4spring.profiles.active\u00b4 property:
\"How<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 8: How do you enable scheduling in a Spring Boot application?<\/strong>

Answer:<\/strong> To schedule in the Spring application add the \u00b4@EnableScheduling\u00b4 annotation to a configuration class and use \u00b4@Scheduled\u00b4 on the methods you want to run scheduled tasks.
\"<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 9: How do you configure logging in a Spring Boot application?<\/strong>

Answer: <\/strong>Configure logging in \u00b4application.properties\u00b4 or \u00b4logback-spring.xml\u00b4. Let us see an example in \u00b4application properties\u00b4:
\"<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 10: How do you configure a custom banner in Spring Boot?<\/strong>

Answer: <\/strong>Create a \u00b4banner.txt\u00b4 file in the \u00b4src\/main\/resources\u00b4directory with the custom ASCII art or text you want to display on application startup.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Also Read: <\/strong>How to Answer \u2018Walk Me Through Your Resume?\u2019<\/strong><\/a><\/p>\n\n\n\n

Spring Boot Actuator<\/span><\/h2>\n\n\n\n

Find 10 questions and answers related to Spring Boot Actuator<\/strong> in Spring Boot Interview Questions:<\/p>\n\n\n\n

\"Spring<\/figure>\n\n\n\n
Question 1: What is Spring Boot Actuator?<\/strong>
Answer: <\/strong>Spring Boot Actuator provides production-ready features to help you monitor and manage your Spring Boot application. It includes endpoints for health checks, metrics, and more.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 2: How do you enable Spring Boot Actuator in a project?<\/strong>
Answer:<\/strong> Add the \u00b4spring-boot-starter-actuator\u00b4dependency to your \u00b4pom.xml’:
\"How<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 3: How do you access Actuator endpoints?<\/strong>
Answer<\/strong>: By default, Actuator endpoints are accessible via HTTP at \u00b4\/actuator\u00b4. For example, \u00b4https:\/\/localhost:8080\/actuator\/health\u00b4for for health checks.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 4: How can you customize the Actuator endpoints?<\/strong>
Answer: <\/strong>Customize Actuator endpoints using the \u00b4application.properties\u00b4 file. For example, to enable the \u00b4shutdown\u00b4endpoint:
\"How<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 5: What is the purpose of the \u00b4\/actuator\/health\u00b4endpoints?<\/strong>
Answer: <\/strong>The \u00b4\/actuator\/health\/\u00b4endpoint provides the health status of your application. It checks various components and reports whether they are operating correctly.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 6: What is the purpose of the \u00b4\/actuator health\/\u00b4endpoints?<\/strong>
Answer:<\/strong> The \u00b4\/actuator\/health\/\u00b4endpoints provide the health status of your application. It checks various components and reports whether they are operating correctly.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 7: How do you secure Actuator endpoints?<\/strong>
Answer:<\/strong> Secure Actuator endpoints using Spring Security. You can configure security settings in a class that extends \u00b4WebSecurityConfigureAdapter\u00b4:\"<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 8: How do you add custom health indicators?<\/strong>
Answer:<\/strong> Implement the \u00b4HeathIndicator\u00b4 interface and override the \u00b4health\u00b4 method. Register the custom health indicator as a Spring bean:
\"How<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 9: What is the \u00b4\/actuator\/info\u00b4endpoint used for?<\/strong>
Answer:<\/strong> The \u00b4\/actuator\/info\u00b4endpoint provides general information about the application. You can customize the information by adding properties to \u00b4application.properties\u00b4:
\"What<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 10: How do you configure custom metrics in Spring Boot Actuator?<\/strong>
Answer<\/strong>: Use the \u00a8MeterRegistry\u00b4 to create custom metrics. For example
\"How<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Also Read: <\/strong>Why Do You Want This Job? Tips, Samples<\/strong><\/a><\/p>\n\n\n\n

Security in Spring Boot<\/span><\/h2>\n\n\n\n

Find 10 questions and answers related to Security<\/strong> in Spring Boot Interview Questions:<\/p>\n\n\n\n

\"Security<\/figure>\n\n\n\n
Question 1: What is Spring Security in Spring Boot?<\/strong>

Answer:<\/strong> Spring Security is a framework in Spring Boot that provides authentication, authorization, and other security features for your application. It helps you secure your web application by configuring security measures easily.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 2: How do you add Spring Security to a Spring Boot application?<\/strong>

Answer: <\/strong>To add Spring Security to a Spring Boot application, you need to include the \u00b4spring-boot\u2013starter-security dependency in your \u00b4pom.xml.\u00b4file. Spring Boot will automatically configure basic security settings.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 3: How do you create a custom login page in Spring Security?<\/strong>

Answer: <\/strong>To create a custom login page, you configure it in your security configuration class by overriding the \u00b4configure (HttpSecurity http)\u00b4method. Use the \u00b4formLogin ()\u00b4 method and set your login page URL with \u00b4loginPage(\u00a8\/my-login-page\u00a8)\u00b4.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 4: What is CSRF and how do you enable it in Spring Boot?<\/strong>

Answer<\/strong>: CSRF (Cross-Site Request Forgery) is an attack that tricks a user performing actions they did not intend to. Spring Security enables CSRF protection by default. You cna disable it (not recommended) by configuring \u00b4http.csrf (). Disable ()\u00b4 in your security configuration class.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 5: How do you secure REST endpoints in a Spring Boot application?<\/strong>

Answer:<\/strong> To secure REST endpoints, you can configure HTTP security in your security configuration class. Use \u00b4authorizeRequests()\u00b4 to specify which endpoints need authentication and authorization, and use \u00b4httpBasic ()\u00b4 or \u00b4forLogin ()\u00b4 for authentication mechanisms.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 6: What is the purpose of the \u00b4@Secured\u00b4 annotation in Spring Security?<\/strong>

Answer: <\/strong>The \u00b4@Secured\u00b4 annotation is used to specify security constraints on individual methods. You can use it to allow access to a method only to users with certain roles for example, \u00b4@Secured(\u00a8ROLE_USER\u00a8)\u00b4.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 7: How do you store use details for authentication in Spring Security?<\/strong>

Answer: <\/strong>You can store user details in memory, in a database, or using an external authentication provider. For in-memory storage, use \u00b4InMemoryUserDetailsManager\u00b4 and for database storage, you typically implement \u00b4UserDetailsService\u00b4 and configure a \u00a8JdbcUserDetailsManage\u00b4.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 8: What is the difference between \u00b4@PreAuthorize\u00b4 and \u00b4annotation?<\/strong>

Answer: <\/strong>The \u00b4@PreAuthorize\u00b4 annotation checks the given expression before the method executes, ensuring that the user has the necessary permissions. The \u00b4@PostAuthrize\u00b4 annotation checks the expression after the method has executed, which can be useful for checking the return values.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 9: How do you implement password encoding in Spring Security?<\/strong>

Answer: <\/strong>To implement password encoding, you configure a \u00b4PasswordEncoder\u00b4 bean. Commonly used encoders include \u00b4BCryptPasswordEncoder\u00b4. You use this encoder to hash passwords before storing them and to verify passwords during login.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 10: What is OAuth2 and how does Spring Boot support it?<\/strong>

Answer:<\/strong> OAuth2 is an authorization framework that allows applications to access resources on behalf of users. Spring Boot supports OAuth2 by providing auto-configuration for OAuth2 resources and clients. You can configure OAuth2 properties in your application properties file and use the \u00b4spring-security-oauth2-client\u00b4 dependency for integration.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Also Read: <\/strong>How to Answer, \u2018What You Can Bring to the Company?\u2019<\/strong><\/a><\/p>\n\n\n\n

Deployment and Monitoring<\/span><\/h2>\n\n\n\n

Find 10 questions and answers related to Deployment and Monitoring<\/strong> Spring Boot Interview Questions:<\/p>\n\n\n\n

\"Deployment<\/figure>\n\n\n\n
Question 1: How do you package a Spring Boot application for deployment?<\/strong>

Answer: <\/strong>You package a Spring Boot application as a JAR (Java ARchive) or WAR (Web Application Archive) file. You can do this by running \u00b4mvn package\u00b4 for Maven or \u00b4 .\/gradlew build\u00b4 for Gradle, which creates the packaged file in the \u00b4target\u00b4 or \u00b4build\/libs\u00b4 directory.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 2: How do you run a Spring Boot application as a standalone JAR?<\/strong>

Answer:<\/strong> You run a Spring Boot application as a standalone JAR by using the command \u00b4java -jar your-application.jar\u00b4. This starts the embedded web server and runs your application.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 3: How do you deploy a Spring Boot application to a server like Tomcat?<\/strong>

Answer:<\/strong> To deploy a Spring Boot application to a Tomcat server, you package it as a WAR file by setting \u00b4packaging\u00b4 to \u00b4war\u00b4 in your pom.xml. Then, you copy the WAR file to the \u00b4webapps\u00b4 directory of your Tomcat server.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 4: How do you configure environment-specific properties in Spring Boot?<\/strong>

Answer: <\/strong>You configure environment-specific properties by creating separate properties files for each environment, such as \u00b4application-dev.properties\u00b4 and \u00b4application-prod.properties\u00b4. You then specify the active profile using \u00b4spring.profiles.active\u00b4 in your application properties or as a command-line argument.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 5: How do you use Docker to deploy a Spring Boot application?<\/strong>

Answer: <\/strong>You deploy a Spring Boot application using Docker by creating a \u00b4Dockerfile\u00b4 that specifies the base image, copies your JAR file into the image, and sets the command to run the JAR. You then build the Docker image with \u00b4docker build\u00b4 and run it with \u00b4docker run\u00b4.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Also Read: <\/strong>How to Answer, \u2018What Are Your Greatest Strengths?\u2019<\/strong><\/a><\/p>\n\n\n\n

Monitoring Questions<\/span><\/h3>\n\n\n\n
Question 6: What is Spring Boot Actuator and how does it help in monitoring?<\/strong>

Answer: <\/strong>Spring Boot Actuator provides production-ready features like health checks, metrics, and monitoring for your application. It helps you monitor the application’s state, metrics, and environment through various endpoints.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 7: How do you enable Actuator endpoints in Spring Boot?<\/strong>

Answer: <\/strong>You enable Actuator endpoints by including the \u00b4spring-boot-starter-actuator\u00b4 dependency in your \u00b4pom.xml\u00b4 or \u00b4build.gradle\u00b4 file. You can then configure which endpoints to expose in your \u00b4application.properties\u00b4 file.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 8: How do you customize Actuator endpoints in Spring Boot?<\/strong>

Answer: <\/strong>You customize Actuator endpoints by setting properties in your \u00b4application.properties\u00b4 file, such as \u00b4management.endpoints.web.exposure.include=* to expose all endpoints or specify individual endpoints to include or exclude.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 9: How do you integrate Spring Boot with Prometheus for monitoring?<\/strong>

Answer: <\/strong>You integrate Spring Boot with Prometheus by adding the micrometer-registry-prometheus dependency. You then configure Prometheus to scrape metrics from the \u00b4 \/actuator\/prometheus\u00b4 endpoint provided by Actuator.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Question 10: How do you set up health checks in Spring Boot?<\/strong>

Answer: <\/strong>You set up health checks in Spring Boot using Actuator’s health endpoint. By default, it includes several health indicators. You can add custom health indicators by implementing the \u00b4HealthIndicator\u00b4 interface and registering it as a bean.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Spring Boot helps simplify the development process of Spring applications by providing auto-configuration, embedded servers, and production-ready features out of the box. <\/p>\n\n\n\n

By understanding the concepts and features of the topic, one can effectively communicate their knowledge during Spring Boot interview questions. <\/p>\n\n\n\n

This further helps in demonstrating the interviewee’s learning skills and proficiency with the popular framework while also increasing their chances of success. <\/p>\n\n\n\n

Also Read: <\/strong>What is Your Greatest Weakness? Tips, Samples<\/strong><\/a><\/p>\n\n\n\n

FAQs<\/span><\/h2>\n\n\n\n
Q.1: How do I prepare for a Spring Boot Interview?<\/strong><\/strong>

Ans:<\/strong> To prepare for the Spring Boot Interview, focus on understanding the core concepts like auto-configuration and embedded servers. Practice building sample applications and explore features like Actuator and Dev Tools. You can also review Spring fundamentals and real-world cases.<\/p> <\/div>

Q.2: What is Spring Boot’s main purpose?<\/strong><\/strong>

Ans:<\/strong> The main purpose of Spring Boot is to simplify and accelerate the development of Spring-based applications by reducing initial setup and configuration, allowing developers to focus on writing application logic.\u00a0<\/p> <\/div>

Q.3 What are the advantages of Spring Boot?\u00a0<\/strong><\/strong>

Ans:<\/strong> The advantages of Spring Boot include auto-configuration, embedded servers, starter dependencies, production-ready features, live reloading during development, and streamlined project setup through the initialisation, enabling rapid application development.\u00a0<\/p> <\/div> <\/div>\n\n\n\n

Related Reads<\/strong><\/p>\n\n\n\n

How to Ask for Promotion?<\/strong><\/a><\/td>How to Give a Self Introduction in Viva Exam?<\/strong><\/a><\/td><\/tr>
Teacher Self Introduction in Interview<\/strong><\/td>Self-Introduction for Internship Interview<\/strong><\/a><\/td><\/tr>
Self-Introduction for Experienced Software Engineers: Samples<\/strong><\/a><\/td>Self-Introduction in English for Medical Representative Interview<\/strong><\/a><\/td><\/tr>
Types of Guidance and Counselling: <\/strong><\/a>
Benefits and Difference<\/strong><\/a><\/td>		Self-Introduction for Customer Service<\/strong><\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

This was all about the Spring Boot Interview Questions. We hope the above-listed questions will make your interview preparation efficient. For more information on such creative topics, visit our career counselling<\/strong><\/a> page and follow Leverage edu<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"Spring Boot is a powerful framework that makes developing Spring applications easier and faster. 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