C# interview questions :- What are the benefits of three tier architecture ?

C# interview questions :- What are the benefits of three tier architecture ?


This is a very popular c# interview question. In 3 tier architecture / layer we divide the project in to 3 layers UI , Middle  and DAL.  Due the modular approach we have 2 big advantages

Reusability :- You can reuse the middle layer with different
user interfaces like ASP.NET , windows etc. You can also reuse you DAL with  different projects.

Maintainability :-  When we change in one layer due to the
modular approach it does not have ripple effect on other layers. we have to do less amount of changes in other layer when we change logic of one layer.


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