Find Interview Questions for Relinns Technologies

Right Answer:
The types of model relationships in Django are:

1. **One-to-One**: Each record in one model is related to one record in another model.
2. **One-to-Many**: A record in one model can be related to multiple records in another model.
3. **Many-to-Many**: Records in one model can be related to multiple records in another model, and vice versa.

Right Answer:
Please provide the code fragment for analysis.

Right Answer:
You can test Spring Boot applications using the `@SpringBootTest` annotation, which loads the full application context. You can also use `@MockBean` to mock dependencies, `@Test` for writing test methods, and `@Autowired` to inject beans. Additionally, you can use `MockMvc` for testing web layers and `@DataJpaTest` for testing JPA repositories.

Right Answer:
To create RESTful APIs in Spring Boot, follow these steps:

1. **Set up a Spring Boot project** using Spring Initializr or your preferred method, including dependencies like Spring Web.

2. **Create a Controller class** annotated with `@RestController`.

3. **Define request mapping methods** using annotations like `@GetMapping`, `@PostMapping`, `@PutMapping`, and `@DeleteMapping` to handle different HTTP methods.

4. **Use `@RequestParam`, `@PathVariable`, and `@RequestBody`** to handle input data.

5. **Return appropriate response types**, such as `ResponseEntity` or custom objects, to send data back to the client.

6. **Run the application** and test the endpoints using tools like Postman or curl.

Right Answer:
Spring Framework is a comprehensive framework for building Java applications, providing features like dependency injection, aspect-oriented programming, and transaction management. Spring Boot, on the other hand, is a tool built on top of the Spring Framework that simplifies the setup and development of new Spring applications by providing default configurations, embedded servers, and a convention-over-configuration approach.

Right Answer:
In Spring Boot, you can implement exception handling using the `@ControllerAdvice` annotation along with `@ExceptionHandler` methods. This allows you to define global exception handling for your controllers. You can also use `ResponseEntity` to customize the response. Here's a simple example:

```java
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;

@ControllerAdvice
public class GlobalExceptionHandler {

@ExceptionHandler(Exception.class)
public ResponseEntity<String> handleException(Exception ex) {
return new ResponseEntity<>(ex.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
}
}
```

Right Answer:
To create and manage a Spring Boot microservice, follow these steps:

1. **Set Up Project**: Use Spring Initializr (https://start.spring.io/) to generate a new Spring Boot project with dependencies like Spring Web, Spring Data JPA, etc.

2. **Define Application Structure**: Organize your project with packages for controllers, services, repositories, and models.

3. **Create REST Controller**: Implement a controller class annotated with `@RestController` to handle HTTP requests.

4. **Implement Service Layer**: Create a service class annotated with `@Service` to contain business logic.

5. **Set Up Data Access**: Use `@Repository` for data access classes, and configure JPA/Hibernate for database interactions.

6. **Configuration**: Define application properties in `application.properties` or `application.yml` for database connection and other settings.

7. **Run the Application**: Use the command `mvn spring-boot:run` or