In English. With Limited words. In an Easy Understandable 
Manner.

  Architecture of particular project means one tier or two 
tier or three tier projoect. For example if a project 
application is two tire it is communicate between client 
and server directly. If the application communicate 
betwween client system and webserver after that webserver 
server of the application is called three tire structure.

If I am wrong let me know.

Project Architecture, exactly right what rajesh said. Its 
one tire or two tire or... When candidate is placed inside 
the project, he l be given the documents. In that 
documents, project structure and process also will be 
given, It shows the Entire process from batabase to 
informatica to BO

Mr "A" it is a official site.it is not a commidy site to do 
commidy.Every one should speak in English only.ur advice is 
too worest.

Project Architecturemeans not only 2-tier/n-tier, we need to
explain how the systems are connected within the systems,
how the communication happens between different systems
including third party components etc.

The term also refers to documentation of a system's 
software architecture. Documenting software architecture 
facilitates communication between stakeholders, documents 
early decisions about high-level design, and allows reuse 
of design components and patterns between projects.