Business Layer in 3 tier Architecture

Question

I went for an interview, and was asked to show up my Business layer architecture. I have some idea about 3 tier architecture but really no idea, to what to write in front of

Answer 1

A 3-tier architecture is a type of software architecture which is composed of three “tiers” or “layers” of logical computing. They are often used in applications as a specific type of client-server system. 3-tier architectures provide many benefits for production and development environments by modularizing the user interface, business logic, and data storage layers.

Business Logic Layer: Business logic is the programming that manages communication between an end user interface and a database. The main components of business logic are business rules and workflows.

A Business Logic Layer (BLL) that serves as an intermediary for data exchange between the presentation layer and the DAL. In a real-world application, the BLL should be implemented as a separate Class Library project in App_Code folder in order to simplify the project structure. below illustrates the architectural relationships among the presentation layer, BLL, and DAL.

The BLL Separates the Presentation Layer from the Data Access Layer and Imposes Business Rules