Capgemini Senior Java Developer Interview Questions, Process, and Tips

JPA connection in Spring Boot allows for easy integration of Java Persistence API with the Spring framework.

• Use @Entity annotation to mark a class as an entity for JPA

• Configure data source properties in application.properties file

• Use @Repository annotation to enable JPA repository functionality

Spring Boot supports multiple threading through the use of Java's Executor framework.

• Spring Boot provides a TaskExecutor interface for executing tasks asynchronously.

• The @Async annotation can be used to mark a method as asynchronous.

• Spring Boot also supports scheduling tasks using the @Scheduled annotation.

• Thread safety can be ensured through the use of synchronized blocks or locks.

• Examples: implementing a background t...read more

Future is a concurrent programming construct while Completable Future is an extension of Future with more features.

• Future is a simple interface that represents the result of an asynchronous computation.

• Completable Future is an extension of Future that provides more features like chaining, combining, and exception handling.

• Completable Future can be used to create a pipeline of asynchronous tasks.

• Completable Future can a...read more