Hi Aivazhagan Sekar,
Architectural pattern is depend up on what about project structure and how to build the application and how to link the application with database etc,...
Your question is totally different with the above concerns, one you done the application you can run that application in N no of systems, but we won't say that is 1-Tier, 2-Tier based on application run in no of systems, we can say that how it is interrelated with project and how it's configure, how data fetches from database with easiest and effective way etc...
So, please elaborate your question clearly..
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