About the architecture of project

Question

Dear All,

 

I face one question in a lot of interviews about the architecture of project. I have answered in many ways but every time interviewer seems dissatisfied. I have worked mostly on web applications which have 3 layered like

 

Presentation Layer

Business Layer

Database Layer  

 

I tried to explain them about the same like presentation layer is UI, business layer consist of business logic and common db functions which communicates with database(SQL) to insert,select and update data.

 

Is there any thing wrong that I am explaining, if yes then please suggest the appropriate answer for this question or if there is any other way i can explain

 

Thanks in advance.