ValueLabs Senior Business Analyst Interview Questions, Process, and Tips

Abstract class can have implementation while interface only has method signatures.

• Abstract class can have constructors while interface cannot.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Abstract class can have non-public members while interface only has public members.

• Abstract class is used for creating a base class while interface is used for implementing a contract.

• Example o...read more

Transaction management in Hibernate/JPA

• Hibernate/JPA provides transaction management support through the EntityManager API

• Transactions can be managed programmatically or declaratively using annotations

• The @Transactional annotation can be used to mark a method as transactional

• Hibernate/JPA supports different transaction isolation levels and propagation behaviors

• Rollback can be triggered programmatically or automatically

Agile allows for flexibility, collaboration, and faster delivery compared to the rigid and sequential waterfall model.

• Agile emphasizes on continuous feedback and improvement

• Agile allows for changes to be made throughout the development process

• Agile promotes collaboration and communication among team members

• Agile enables faster delivery of working software

• Waterfall model is rigid and sequential, making it difficult to m...read more

Concurrency is the ability of a program to execute multiple tasks simultaneously.

• Achieved through multi-threading or asynchronous programming

• Requires careful management of shared resources to avoid race conditions

• Examples include implementing a chat application or processing multiple requests simultaneously