Epsilon Lead Developer Interview Questions, Process, and Tips for Experienced

Abstract and Interface are important concepts in object-oriented programming.

• Abstract classes provide a way to define common behavior for a group of classes.

• Interfaces define a contract that classes must adhere to.

• Abstract classes can have both abstract and non-abstract methods.

• Interfaces can only have abstract methods and constants.

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

• ...read more

The life cycle of an MVC application involves the stages of initialization, request processing, rendering, and disposal.

• Initialization: Application starts, routes are configured, and controllers and views are initialized.

• Request processing: User sends a request, which is routed to the appropriate controller. Controller processes the request and interacts with the model and view.

• Rendering: Controller passes data to the ...read more

Indexers in SQL servers are database objects that improve query performance by allowing faster data retrieval.

• Indexers are created on one or more columns of a table to speed up data retrieval operations.

• They work by creating a separate data structure that holds a copy of a portion of the data, allowing for faster searching and sorting.

• Indexers can be created on both clustered and non-clustered tables.

• They can be create...read more

Filters in MVC are used to intercept and modify incoming requests or outgoing responses.

• Filters can be used to implement authentication and authorization.

• They can be used to handle exception and error logging.

• Filters can be used to modify the response before it is sent to the client.

• They can be used to implement caching and performance optimizations.

• Filters can be applied globally or to specific controllers or actions.