Medival Technologies Senior Software Developer Interview Questions and Answers

Annotations in Spring Boot are used to simplify the configuration and management of the application.

• Annotations are used to define the behavior of the application components.

• They are used to configure the application context, controllers, services, repositories, etc.

• Annotations can be used to define the request mapping, data binding, validation, security, etc.

• Some commonly used annotations in Spring Boot are @RestContr...read more

The @JoinColumn is used to specify the column used for joining an entity association or element collection.

• Used in JPA to specify the column used for joining an entity association or element collection

• Helps to map the foreign key column in the owning entity to the primary key column in the target entity

• Can be used to customize the join column name, nullable, unique, and foreign key constraints

ManyToOne is a JPA annotation used to define a many-to-one relationship between two entities.

• ManyToOne is used to map a single entity to multiple instances of another entity.

• It is used to define a parent-child relationship between two entities.

• It is used to specify the foreign key column in the child entity.

• It is used to optimize database queries by reducing the number of joins.

• Example: A customer can have multiple ord...read more

Random unique numbers can be generated using UUID class in Spring framework.

• Import java.util.UUID class

• Create a UUID object using UUID.randomUUID() method

• Convert UUID to string using toString() method

Collection is a data structure used to store and manipulate a group of objects in Spring framework.

• Collections are used to manage and manipulate groups of objects in Spring.

• Spring provides several collection classes such as List, Set, and Map.

• Collections can be configured and managed using Spring's dependency injection.

• Collections can be used to store and retrieve data from databases, files, and other sources.