What is a Three-Tier Architecture?

Answer Posted / nilesh

Three-tier architecture also known as MVC architecture in
which software design is split into three groups as Model,
View and Controller part of UI goes in model section while
Business logic goes in controller section and data access
layer goes in view layer.
Now consider the view or data access layer(DAL) in which
operations such as data access from database insertion such
type of operations are kept in this section. In Controller
known as business logic layer in which all logic related to
UI and DAL is implemented here and accessed from UI using
instance of objects. Finally in UI only UI related code is
written here.

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