Bounteous x Accolite Java Back End Developer Interview Questions, Process, and Tips

Implemented multithreading using Java's Thread class and Executor framework.

• Used Thread class to create and manage threads.

• Utilized Executor framework for managing thread pools and executing tasks.

• Implemented synchronization mechanisms like locks and semaphores to prevent race conditions.

• Used Java's concurrent data structures like ConcurrentHashMap and BlockingQueue for thread-safe operations.

Lock isolation in Spring Framework ensures that each transaction operates independently without interfering with other transactions.

• Lock isolation prevents concurrent transactions from affecting each other's data.

• Different levels of lock isolation can be set in Spring, such as READ_COMMITTED and REPEATABLE_READ.

• For example, setting a higher level of lock isolation like REPEATABLE_READ ensures that a transaction will no...read more

The @Primary annotation is used to give a higher priority to a bean when multiple beans of the same type are present. The @Qualifier annotation is used to specify which bean to inject when multiple beans of the same type are present.

• Use @Primary annotation to specify the primary bean to be used when multiple beans of the same type are present.

• Use @Qualifier annotation along with the bean name to specify which bean to i...read more

Implementing security measures for microservices involves using authentication, authorization, encryption, and monitoring.

• Implement authentication mechanisms such as OAuth, JWT, or API keys to verify the identity of clients accessing the microservices.

• Enforce authorization rules to control access to different parts of the microservices based on roles and permissions.

• Use encryption techniques like TLS/SSL to secure comm...read more

Saga pattern is used to manage distributed transactions in microservices by breaking them into smaller, independent transactions.

• Saga pattern involves breaking down a long transaction into a series of smaller, independent transactions.

• Each step in the saga is a separate transaction that can be rolled back if needed.

• Compensating transactions are used to undo the effects of a previously completed step in case of failure.

• ...read more